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N-Methylaniline has played a role in organic chemistry for over a century. Chemists in the late 1800s pushed boundaries by methylating aniline, searching for compounds with versatility. Many early dyestuffs and pharmaceuticals drew on this new class of aromatic amines. Researchers needed compounds that offered both reactivity and stability, and N-Methylaniline, with its simple methyl group on the nitrogen atom, stood out. Over the years, its applications changed, but one thing became clear: chemical innovation often rides on the back of small, incremental changes to a molecule. You see the legacy in old patent literature and classic organic textbooks, where N-Methylaniline crops up time and again in reaction tables and syntheses.
You find N-Methylaniline as a clear, oily liquid with a characteristic amine odor—a staple for people who work in bench chemistry. Its structure carries the basic aniline skeleton, modified just enough to boost solubility in non-polar media and change its reactivity profile. Today, suppliers offer it in varying purities, and high-grade material follows strict standards for analytical calibration or industrial blending. The popularity among chemical companies didn't build overnight; success arrived as it proved its worth as a versatile intermediate and a reliable reference standard. That reputation sticks, largely because chemists continue to gravitate to reliable, well-understood building blocks in a world that values both precision and familiarity.
On the lab bench, N-Methylaniline displays a boiling point around 196 degrees Celsius, and it holds up under normal pressures. The solubility profile leans toward organic solvents like ethanol, ether, and benzene, while water mixtures separate unless you bring in special measures. That solubility helps explain why it crops up in extraction work, synthesis, and as a starting point for modified molecules. From personal experience, its amine character makes it a suitable partner for acid-base extraction and a ready participant in methylation or other N-alkylation reactions. The N-methyl group shifts some of the molecule’s properties: it no longer behaves as a primary aromatic amine, affecting both its hydrogen bonding and nucleophilicity compared to its parent, aniline.
Anyone handling analytical standards knows the importance of accurate labeling. With N-Methylaniline, labs expect explicit data on purity, water content, and contaminant levels—attributes that determine suitability for each application. Regulatory bodies, including REACH and OSHA, hold materials to rigorous standards, meaning manufacturers provide batch-controlled certificates and safety documentation. Labels include hazard warnings linked to its classification as a toxic and possibly carcinogenic amine. These specifications aren't just bureaucratic hurdles; they guard employees' health and ensure experimental integrity. Researchers learn early to watch out for ambiguous labeling. A few tenths of a percent of impurity can throw off calibration, lead to regulatory action, or skew research findings.
Synthesizing N-Methylaniline involves straightforward chemistry if you have some experience in alkylation reactions. Chemists often methylate aniline using methylating agents such as methyl iodide in the presence of a base. Industrial settings use dimethyl sulfate or formaldehyde and hydrogen under catalytic conditions, seeking yield and cost-effectiveness. Reactions scale up well, but control becomes vital—overalkylation leads to N,N-dimethylaniline, a different compound altogether. Purification steps often involve distillation, as the boiling point helps separate N-methylaniline from unwanted byproducts and residual solvents. Batching and scale-up call for vigilance; even skilled operators encounter bottlenecks if temperature or methyl source drifts out of balance.
The chemistry of N-Methylaniline opens doors to further modifications. Its methyl group on nitrogen blocks it from behaving as a primary aromatic amine, directing its reactivity in electrophilic aromatic substitution to ortho and para positions. You sometimes see it as a precursor for more complex molecules, including dyes, agrochemicals, and specialty polymers. My time working at a specialty chemical lab brought plenty of tests on catalytic hydrogenation and coupling reactions, noting that N-Methylaniline consistently produced reliable downstream products. Other researchers have reported successful Friedel-Crafts acylations, sulfonations, and diazonium coupling, where its altered electronic profile yields different selectivities compared to plain aniline.
People across chemistry call N-Methylaniline by different names, depending on geography and context. Common aliases include NMA, mono-methylaniline, and N-MA. You’ll also find references to methylated aniline or secondary aniline, though strict nomenclature favors the IUPAC “N-Methylaniline.” Some suppliers and protocol writers use registry numbers like CAS 100-61-8 to avoid confusion. In academic articles and regulatory filings, those numbers and synonyms matter; without standardization, critical safety and research findings become hard to match across borders and disciplines.
From a safety perspective, N-Methylaniline falls under hazardous substances. Exposure can cause respiratory, skin, and eye irritation. Chronic exposure links to blood disorders due to its aromatic amine core. Regulatory agencies demand safety data sheets and proper labeling for all transportation and use. In the lab, anyone who's spilled or inhaled even a small amount recalls the unmistakable odor and immediate urge to step back. Good ventilation, gloves, and eye protection become non-negotiable, and the need for containment takes on added weight for bulk industrial users. Waste handling protocols demand care; disposal without proper documentation risks both environmental harm and regulatory penalties.
N-Methylaniline has made its mark as a versatile intermediate. In fuel research, it serves as an octane booster though its toxicity has limited widespread adoption. The dye industry uses it in producing azo compounds and triarylmethane dyes. Its role as a building block extends to pharmaceuticals, polymers, and agricultural chemicals. In research labs, you’ll find it as a calibration standard for chromatographic analysis or as a test case when screening catalysts and synthetic methodologies. I’ve seen it switched into reaction schemes looking for subtle modifications to aromatic rings or to test selectivity in amine-alkylation protocols. While its use as a gasoline additive has declined in some regions due to environmental and health concerns, it still finds work as a reference point for studying nitrogen-containing organics.
Research teams keep returning to N-Methylaniline because its structure helps answer broad chemical questions. Analysts use it to refine GC or LC-MS calibration curves, while synthetic chemists probe new pathways by tweaking the methyl group or swapping substituents on the ring. Over the last decade, interest has shifted towards understanding how subtle changes in structure alter properties relevant to drug design and catalysis. Environmental scientists have also begun to track its fate in soil and water, especially given concerns about aromatic amine degradation and its role as a marker for industrial contamination. R&D budgets follow trends like green chemistry and sustainability, prompting teams to revisit old molecules like N-Methylaniline using modern techniques that cut waste or lower barriers to entry for more sustainable processes.
Toxicologists have looked long and hard at N-Methylaniline. Tests show that it causes methemoglobinemia in mammals and possible carcinogenicity with long-term exposure. Risk factors multiply when safety gear or ventilation falls short. Researchers now evaluate its breakdown products and persistence in aquatic and soil environments. As regulators turn up scrutiny on aromatic amines, data from toxicity studies shape the company’s operating procedures, permissible exposure limits, and waste management strategies. Industry shifts away from materials that present elevated health risks, but complete elimination proves tough, given N-Methylaniline’s utility and the lack of perfect substitutes. That tension keeps the safety conversation going, both in the classroom and at company safety briefings. I’ve sat through more than one meeting where the focus on possible alternatives falters under the reality that certain molecules just work so well—tradeoffs rarely fall along simple lines.
The road ahead for N-Methylaniline links into wider trends in chemical safety, green chemistry, and regulatory oversight. As analytical detection improves and environmental awareness rises, pressure increases to limit the use of aromatic amines like N-Methylaniline, especially outside controlled industrial settings. Opportunities exist by engineering safer derivatives or closed-loop production and recycling systems that keep hazardous materials away from broader ecosystems. Researchers—both academic and industrial—keep probing new uses where the methylated amine offers a clear performance or cost advantage without the same downsides as unrestricted bulk use. Some of the most promising future work lies in developing catalysts or biosynthetic pathways that either modify N-Methylaniline less hazardously or transform waste back into usable feedstocks. It’s a balancing act: protecting health and the environment while extracting enduring value from tried-and-true chemical scaffolds.
N-Methylaniline shows up as a colorless liquid with a distinct odor, found in labs, factories, and sometimes in products unnoticeable to folks outside the industry. Its chemical formula is C7H9N, and it carries the CAS number 100-61-8. These identifiers sound dry at first glance. In practice, they keep people on the same page—no confusion when trading, storing, or reporting on what’s inside a barrel or a sampling vial.
Chemicals with ambiguous names turn up trouble fast. N-Methylaniline goes by several aliases, but the formula and CAS number settle any mix-ups. In my experience, plant audits grind to a halt if product identity can’t be quickly confirmed. I’ve seen regulatory inspectors flip through purchase orders, match up CAS numbers, and clear shipments on the spot. This process saves companies time and helps keep hazardous materials from falling into the wrong hands—or the wrong machinery.
N-Methylaniline’s role goes further than simple supply lists. I’ve seen it at work as an intermediate in dye manufacturing, paint additives, and even in custom fuel blends. The fuel industry tightens specifications, and an error isn’t just a headache; it can wreck an engine or breach environmental law. Product standards keep everyone accountable, down to the smallest print on a delivery slip.
Scientists rely on standardized reference materials to calibrate equipment. A standard compound—verified by formula and CAS number—means that when a lab technician checks for impurities, the answer stands up whether the lab is in Paris, Mumbai, or Des Moines. Accreditation boards now demand more thorough documentation, especially since international trade depends on confidence in those tiny codes.
N-Methylaniline is not a substance people want in their water or air. Research has linked its misuse to acute toxicity and environmental hazards. Factories must report its use to environmental authorities. History offers plenty of examples where a missing number on a storage drum led to dangerous confusion during an emergency response. Tighter labeling systems work better when everyone embraces the discipline of using CAS numbers and formulas without shortcuts.
Occupational exposure can bring health hazards for workers. I remember safety briefings that listed N-Methylaniline’s symptoms—headaches, skin irritation, even more serious results at high exposure. Personal protective equipment only works if workers recognize the chemical at a glance and know how to respect it. This is why education about chemical labeling should be practical, not just a checkbox exercise.
Building safer workplaces and communities starts before the chemical reaches the dock. Digital inventory systems flag mismatches between shipping manifests and formulas. Training employees to check chemical details reduces slip-ups. Cleaning up ambiguous naming in purchasing means the right materials arrive every time.
Public databases like those run by the National Institutes of Health make it easier for researchers, policymakers, and industry folks to trace every material by formula and number. These open resources empower anyone—from engineers to neighborhood advocates—to understand what is being used around them. Transparency here isn’t just about following the rules; it’s about building trust.
Seeing how much these basics matter—chemical formula: C7H9N, CAS number: 100-61-8—drives home the point that safe, clear labeling isn’t paperwork. It’s real-world safety, scientific accuracy, and business honesty, all in one straightforward step.
Any lab working with fuel quality testing relies on consistency. Refineries and independent fuel testing labs often use N-Methylaniline Standard to calibrate advanced instruments like gas chromatographs. This chemical plays a key role in making sure test results are accurate, whether those results are being reported to a client or checked by regulatory bodies. Gasoline blending, octane rating, and impurity detection all demand the kind of traceable standards N-Methylaniline brings to the bench.
Chemists know the pain of chasing down outliers in their research due to poor calibration. N-Methylaniline Standard addresses this directly. When a researcher is developing new analysis methods—or comparing the purity of materials from different sources—quality reference materials anchor those experiments to recognized benchmarks. If a university or private lab is comparing synthetic pathways or studying reaction mechanisms, reliable standards keep the data honest and reproducible.
Poor calibration doesn't just waste time and resources. In petroleum and chemical manufacturing, a simple misstep can send contaminants into air or water, threatening both human health and natural ecosystems. The right standard lets regulators and inspectors trust that what they’re seeing in the lab matches what’s happening in real pipelines or storage tanks. That same trust keeps industrial workers safe from unexpected exposures and supports companies facing tight environmental regulations.
For anyone running a quality control process, the value of a trusted reference grows fast. N-Methylaniline Standard is a go-to for labs making sure the ingredients in each batch of fuel—or any chemical product—match strict quality specs before shipping. It lets them spot even small deviations before they translate into bigger downstream problems. More than protecting customers, it keeps businesses out of legal and financial trouble tied to poor product quality.
Cost and accessibility block some smaller labs from using certified standards as much as major industry players do. One way forward lies in collaboration—labs in academic or industrial parks can pool resources for higher-end materials and share calibration routines, lowering the barrier for quality research and compliance work. Training also helps. Many mistakes in calibration trace back to unfamiliarity, so practical education in standard preparation and handling saves both money and time in the long run.
Consistent results matter if a company wants to reach markets abroad. Countries check imports for compliance with strict safety and labeling standards. Products validated using high-quality reference materials can pass regulatory hurdles much faster. On the customer side, repeat buyers stay loyal to brands they trust, especially when safety and reliability are on the line. Companies who invest in proper standards build reputations that last much longer than a single sales cycle.
Every scientist and operator in a plant stands to benefit from accurate, credible data. Investing in N-Methylaniline Standard isn’t just about ticking a box for compliance. It comes down to trust and responsibility—protecting workers, the environment, and the people who count on safe, high-quality products. By raising everyday lab practices, industries and researchers cement stronger, more sustainable outcomes for themselves and for everyone relying on their work.
Working with N-Methylaniline Standard calls for real attention to safety. This chemical carries health risks that go beyond basic skin irritation; exposure over time links directly to problems like dizziness, nausea, and damage to the central nervous system. Spilled or mishandled N-Methylaniline poses a real threat—not just for the person using it, but for the entire work environment. Chemical standards, especially ones like this, require a strong safety culture.
A storage area for N-Methylaniline must keep out heat, light, and moisture. The shelf closest to an open window or steam pipe just doesn’t cut it. A cool, well-ventilated room with even temperatures will keep chemical breakdown in check. Fluctuations in temperature or exposure to sunlight can trigger chemical reactions, and no one wants to walk into work on Monday morning to discover a problem bubbling in the supply closet.
Proper labeling is crucial. One faded sticker or scratched-out bottle leads to mistakes. Store the chemical only in its original, tightly sealed container, and keep it away from food and common pathways. I keep a habit of setting up separate shelves with spill pans underneath, and nothing else within arm’s length. It saves headaches and means no mix-up ever ruins a day—or worse, someone’s health.
Gloves, splash goggles, and a lab coat stand between skin and chemical. Even a small drop on bare skin or in the eyes can cause injury. Ventilation counts. Fume hoods help pull dangerous vapors away, and even in a pinch, opening a window can make a difference. If a spill does happen, have absorbent materials and disposal bags ready—don’t rely on paper towels and hope. Practice helps. Running regular safety drills and making sure everyone knows where to find masks, eyewash stations, and emergency showers means a quick, steady response when it matters.
Inhaling N-Methylaniline can bring headaches, confusion, or breathing trouble. Repeated exposure sometimes leads to methemoglobinemia, a disorder where blood can’t carry oxygen like it should. Learning this changed my approach to even small handling tasks—I stopped cutting corners, checked the SDS every time, and kept a close eye on colleagues for signs of exposure. The cost of cutting corners is simply too high.
Lock up N-Methylaniline when not in use, and keep inventory tight. Rushed pours or careless transfers invite accidents or wastage. Training isn’t just a box to tick; everyone handling this chemical needs a full run-through on hazards and safety procedures, refreshed every few months. Emergency contact numbers and safety instructions should always be in plain sight, not tucked away in a binder.
Using spill-proof spouts and leak-proof containers shows respect not just for the chemical, but for everyone sharing the workspace. Never work alone with N-Methylaniline. A buddy nearby can react to an emergency faster than any alarm system. Dispose of leftovers according to hazardous waste guidelines—pouring them down the drain, even in small amounts, threatens both health and the environment.
Caring for people starts with the right storage practices and habits on the bench. While working with N-Methylaniline Standard makes some nervous, clear communication, proper training, and well-kept supplies help everyone breathe easier. A safe lab or workshop keeps work moving forward and gives everyone confidence at the end of the day.
People working in chemical research or fuel blending know N-Methylaniline as a reference material. Purity isn’t just a technical detail you check off a list. Every time I’ve seen a lab technician scan a certificate of analysis, there’s always a split-second where trust hangs in the balance. Whether you’re working on octane boosters or calibrating chromatography equipment, a 99% pure N-Methylaniline can put your mind at ease—because it means fewer “unknowns” could hijack your results.
Most reputable suppliers offer N-Methylaniline Standard with a purity of 99% or above, sometimes as high as 99.5%. Reaching this level takes careful process controls, repeated distillation, and the right storage techniques. Even small variations matter. I remember sifting through data from older batches and noticing that a sample labeled 98% purity produced noticeable background peaks in GC/MS calibration. That purity difference, barely a percent, triggered hours of troubleshooting.
Labs and fuel companies pick high-grade N-Methylaniline not just for pride, but because trace impurities can throw off numbers in tests like oxygenate determination or sulfur analysis. The fewer contaminants ride along, the better the precision.
N-Methylaniline hits the market as a reference for its signature chemical fingerprint. Any contaminant—regardless of how tiny—can mess with this fingerprint. Years ago, in a fuel research project, an analyst flagged an “off” result. The investigation, which stretched over a week, eventually pointed back to a subpar standard with slightly lower purity. That taught me not to cut corners on reference materials, because purity problems often show up as nagging errors in data rather than dramatic failures.
Think about what happens if you use a standard with only 95% purity. You might not know what that missing 5% holds. It could be analogs, decomposition products, or even leftover solvents from manufacturing. Each one can pull your calibration curve in a different direction or trigger ghost peaks during analysis. Regulatory bodies like ISO and ASTM publish strict guidelines for reference materials, insisting on high-purity products to keep measurements consistent across labs.
Trust in purity lives or dies by documentation. Suppliers who post full chromatograms, batch numbers, and calculation methods on their certificates help scientists trace problems back to source. I respect vendors who update their testing methods regularly or invite questions about their assay techniques. Purity claims with zero transparency sound hollow to me.
If you ever doubt a supplier’s claims, asking for a detailed breakdown—showing water content, trace organic impurities, and even residual metal levels—gives you a better picture than a single percentage. Modern labs check standards periodically, keeping backup vials stored away from light and air to slow down degradation.
There is always room for more openness between suppliers and buyers. Consistent third-party testing, batch-to-batch comparison data, and even quick-access QR codes linking to lab reports could make a difference. For scientists and quality managers, the single most powerful move is building direct relationships with manufacturers, pushing for better documentation and upgrades in quality control.
In every lab I’ve worked with, responsibility for accuracy starts with the standards you pick. N-Methylaniline purities above 99% aren’t an arbitrary bar—they’re a baseline built on past frustration, unnecessary troubleshooting, and a collective push for results that mean something.
Anyone working with N-Methylaniline knows the stakes run high. This chemical hits pharmacy labs, flavor compounding, and industrial settings for its handy methyl group that brings versatility. But before anything gets weighed, poured, or diluted, researchers and engineers want to trust what’s in the bottle. That trust starts with a piece of paper: a certificate of analysis, often called a COA.
So much rides on a chemical’s purity. Maybe the experiment needs reproducibility, or the product will head to market. Even the smallest contamination can bring projects to a halt or let toxic by-products sneak in. A COA tracks what’s inside, confirming purity, trace metals, water content, and other contaminants. Receiving a reagent without this basic document means uncertainty. In the lab, uncertainty wastes time, eats money, and sometimes puts safety on the line.
Several suppliers include a COA by default. It’s not just a checkmark for compliance – it’s the foundation of traceability. Without it, I’ve seen plenty of headaches. Teams get stuck retesting the material, racking up lab bills or scrambling for another batch from somewhere else. Over the years, I’ve worked projects where missing or sketchy documentation led to rejected shipments, nixed experiments, even legal headaches. In some countries, labs legally require proof of identity and purity. Without a COA, there’s no evidence of that.
It helps to think about who leaves out a COA. Maybe a distributor lacks a robust quality control process. Or maybe the supplier expects the customer to request one with each order. Scientists and technicians often end up calling or emailing for documentation, wasting hours that could go to research. Strong suppliers bake the COA right into the ordering process, reducing confusion and building trust.
Some larger chemical suppliers digitize the process. With a barcode scan or a product code lookup, anyone on a team can access the COA from their smartphone. I remember once digging through paperwork for a bottle of N-Methylaniline in an old storeroom, only to learn the company had switched to electronic records. Time lost, lesson learned. Digital access means fewer lost documents and more transparency when audits hit.
Here’s what I’ve found works. Before placing an order, ask about the COA. Reputable suppliers have no trouble sending it over, sometimes even ahead of the shipment. If quality is mission-critical, shop where traceability is part of the deal, not an afterthought. At the end of the day, the cost of a missing COA often dwarfs any saving from a cut-rate supplier. A little diligence avoids missed deadlines and dangerous mistakes.
N-Methylaniline isn’t some backroom chemical. High-stakes work in medicine, manufacturing, and tech relies on the details inside its COA. Science never moves faster than trust, and paperwork isn’t a formality. It’s the handshake between buyer and seller, guaranteeing what’s in the drum or vial. Demand the paper, check the numbers, and nobody gets caught off guard down the line.
| Names | |
| Preferred IUPAC name | N-methylaniline |
| Other names |
N-Methylaniline N-Methylbenzenamine N-Methylphenylamine |
| Pronunciation | /ɛnˌmɛθ.ɪl.əˈnɪl.iːn ˈstænd.əd/ |
| Identifiers | |
| CAS Number | 100-61-8 |
| Beilstein Reference | 605315 |
| ChEBI | CHEBI:40548 |
| ChEMBL | CHEMBL1409 |
| ChemSpider | 7279 |
| DrugBank | DB01406 |
| ECHA InfoCard | 03b5be789540-41f2-929a-8c024e677a7d |
| EC Number | 202-870-9 |
| Gmelin Reference | Gmelin 8288 |
| KEGG | C01579 |
| MeSH | D000573 |
| PubChem CID | 7667 |
| RTECS number | UU4025000 |
| UNII | D3V9O57TYX |
| UN number | UN2333 |
| CompTox Dashboard (EPA) | DTXSID2020823 |
| Properties | |
| Chemical formula | C7H9N |
| Molar mass | 121.18 g/mol |
| Appearance | Colorless liquid |
| Odor | Aromatic |
| Density | 0.993 g/mL at 25 °C (lit.) |
| Solubility in water | slightly soluble |
| log P | 1.90 |
| Vapor pressure | 0.46 mmHg (25°C) |
| Acidity (pKa) | pKa 4.85 |
| Basicity (pKb) | 9.41 |
| Magnetic susceptibility (χ) | -72.9 × 10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.608 |
| Viscosity | 0.96 mPa.s (20°C) |
| Dipole moment | 2.22 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 127.8 J·mol⁻¹·K⁻¹ |
| Std enthalpy of combustion (ΔcH⦵298) | -3347 kJ/mol |
| Pharmacology | |
| ATC code | V03AB06 |
| Hazards | |
| Main hazards | Harmful if swallowed. Causes serious eye irritation. Causes skin irritation. Suspected of causing genetic defects. Toxic to aquatic life. |
| GHS labelling | GHS02, GHS06, GHS08 |
| Pictograms | GHS02,GHS07,GHS08 |
| Signal word | Danger |
| Hazard statements | H302 + H312 + H332: Harmful if swallowed, in contact with skin or if inhaled. |
| Precautionary statements | P261, P280, P301+P312, P304+P340, P308+P313, P405, P501 |
| NFPA 704 (fire diamond) | 2-2-0-ALU |
| Flash point | 76 °C |
| Autoignition temperature | 606 °C (1123 °F; 879 K) |
| Explosive limits | Explosive limits: 1.2% - 7% |
| Lethal dose or concentration | LD50 Oral Rat 940 mg/kg |
| LD50 (median dose) | LD50 (median dose): Oral rat 930 mg/kg |
| NIOSH | NA0157 |
| PEL (Permissible) | PEL (Permissible): 5 ppm (parts per million) (Skin) |
| REL (Recommended) | 250 mg |
| IDLH (Immediate danger) | 80 ppm |
| Related compounds | |
| Related compounds |
Acetanilide Aniline N,N-Dimethylaniline N-Ethylaniline N-Methylaniline Phenol |
