© 2026 Nanjing Finechem Holdings Co., Ltd,
All Right Reserved
Chemistry has a way of evolving quietly, with specialized molecules popping up over the decades and becoming must-haves in the lab. N,N-Diisopropylcarbodiimide (DIC), first introduced in the 1950s, is a textbook case. In peptide synthesis, scientists needed an agent that could move quickly, stay stable, and not gum up the works with byproducts. The early days leaned on dicyclohexylcarbodiimide—stubborn stuff, hard to handle and awkward to purify out. Once the isopropyl version arrived, folks welcomed it: less likely to form insoluble byproducts, still reactive enough to get the tough jobs done in organic synthesis.
This compound became a staple. It shows up in liquid form, clear and sharp-smelling. Laboratories across biotechnology, pharmaceuticals, and advanced material research count on DIC for the legwork in creating bonds—especially when building peptides or tweaking carboxylic acids into other compounds. The science community stuck with it not out of habit but because it’s reliable. In my own lab experience, consistent reaction profiles trump fancy names, and DIC fits the bill. No trickery, just dependable results.
N,N-Diisopropylcarbodiimide looks simple, but it’s got a punch. It’s a colorless to pale yellow liquid, prized for its low viscosity and miscibility in organic solvents. The molecule carries two isopropyl groups flanking a functional carbodiimide center, giving it just the right blend of reactivity and steric hindrance. You hold up a bottle, and the chemical’s sharp aroma reminds you to pay attention—ventilation counts in this line of work. The boiling point sits at a manageable range for standard greenhouse operations, so storage isn’t fussier than with similar organics.
Bottles arrive labeled clearly with hazard information—flammable, irritant to the eyes and respiratory tract, handle with gloves and goggles. Every researcher gets the quick tour through safety protocols. Most manufacturers offer purity above 98 percent, which meets even demanding synthesis standards in pharmaceuticals. I’ve never seen a reputable supplier ignore these details, and for good reason: a misstep with an impure or mislabeled reagent can cause a whole month’s worth of ruined experiments.
Producing DIC does not demand bleeding-edge technology but careful chemical work. Factories tend to take readily available diisopropylamine and fire it through a dehydrating reaction with phosgene or similar agents, driving off byproduct gases and leaving behind the active carbodiimide. Proper venting and containment become essential—there’s no room for sloppy technique with reagents like phosgene hovering around. Seasoned chemists know how to keep things safe, check the end product with spectroscopy, and recycle where possible to minimize waste.
DIC jumps into coupling reactions, eager to help create amide bonds. Synthetic chemists get a lot of mileage turning weak carboxylic acids and amines into robust links. I’ve used it in solid-phase peptide synthesis—less gunk, easier separations, faster purifications. Side-products like diisopropylurea remain soluble, avoiding the mess that bogs down older carbodiimides. Sometimes, researchers tweak the molecule by pairing it with additives to push selectivity or avoid unwanted racemization. The versatility here supports everything from small-scale compounds to larger-scale preclinical lots in drug discovery.
This molecule goes by a few names: DIC, N,N'-Diisopropylcarbodiimide, and its CAS registry number appears in research papers. In commercial catalogs, the name stays close to its roots—purists stick with the IUPAC naming, but most chemists just say DIC and move on. It rarely causes confusion, since the field has standardized its usage for decades.
Safety comes front and center in every lab that stocks DIC. Beyond the gloves and goggles, ventilation systems run overtime any time the bottle opens. The compound irritates skin and eyes, and inhalation isn’t pretty either. Most labs store it in flame-proof cabinets and keep a stack of SDS sheets on hand. Standard practice means training new students thoroughly, with supervisors demonstrating best handling techniques. I’ve seen peer labs slip up and pay the price—irritated eyes, ruined batches, or lost time cleaning up accidents. Respect counts more than bravado in chemical work.
Pharmaceutical chemistry leans hard on DIC for synthesizing tricky molecules. When peptide bonds need forging, or amino acid derivatives must come together cleanly, this carbodiimide shines. Life sciences, crop sciences, and specialty material labs also keep it around for niche reactions—crosslinking, polymer modification, custom reagent design. Its performance edge translates to fewer purification headaches, which means projects run faster and budgets stretch further. My firsthand experience shows that every successful peptide project involves this carbodiimide at some stage, the unsung ally doing the heavy lifting.
Research never stops looking for quicker, greener, or safer ways to build molecules. DIC still holds its own thanks to a solid performance-to-cost ratio, but researchers keep trying to refine its use. Labs investigate pairing it with less hazardous co-reagents, try recapturing byproducts, or develop catalysts to cut down waste. Even within academic circles, the quest to minimize side reactions and streamline peptide synthesis continues at a rapid pace. Documented efforts focus on integrating DIC in continuous flow systems for process intensification. I’ve watched startups and seasoned pharma giants alike tinker with these approaches, all looking to rush new drugs from the bench to the bedside.
Every chemical that promises power in synthesis deserves scrutiny for toxicity. DIC doesn’t escape this. Extended exposure causes eye and throat irritation. Chronic skin contact brings allergic responses, especially in poorly ventilated spaces. Toxicology reports highlight these hazards, and the lighter molecular weight means the risk can spread if spills go unnoticed. In vivo studies look to minimize exposure levels during handling—engineering controls, robust training, and, in some jurisdictions, real-time air monitoring. The research community stays up to date with evolving workplace guidelines, making sure safety standards move with new discoveries in acute and long-term effects.
N,N-Diisopropylcarbodiimide maintains its spot at the core of complex synthesis, but the calls for safer, more sustainable chemistry have never been louder. Regulations get tighter, and market demand evolves toward greener alternatives. The next wave of development will likely focus on mitigating hazardous aspects without sacrificing reactivity. Researchers work on engineered systems for recycling spent reagents or capturing emissions. In my view, DIC’s value in both established and cutting-edge applications ensures it will remain relevant until a new, less hazardous workhorse arrives. Real progress lies not only in discovering replacements but in squeezing greater efficiency and safety from the tools already proven to work.
N,N-Diisopropylcarbodiimide, often shortened to DIC in the chemistry world, pulls more weight in labs than most chemicals you’ll find on the shelf. You won’t see it making headlines outside of a chemistry textbook, but research labs and companies hunting for new drugs or materials treat it as a workhorse. The molecule works by kicking off strong chemical bonds, making it a cornerstone for building complex organic compounds.
Peptide chemists count on DIC to help link amino acids together. Those bonds rarely just snap together on their own, so chemists rely on reagents to bridge the gap. DIC acts as a coupling agent, nudging the process forward by turning one amino acid’s carboxyl group into a more reactive form so another amino acid’s nitrogen can jump in and connect. This step forms the backbone of both research peptides and the drugs built from them.
Some people might wonder why DIC got the job instead of something else. Peptide reactions are famous for tripping up scientists with unwanted byproducts and side reactions. DIC does the job efficiently and, with proper handling, leaves fewer leftover chemicals to clean up, saving money and avoiding waste. This cleaner approach helps researchers develop pharmaceuticals with less environmental impact and fewer headaches in the purification process.
Beyond building peptides, DIC plays a role in making esters and amides. If a lab needs to link a carboxylic acid and an alcohol, DIC steps in to smooth out the reaction. That link-up forms everything from specialty solvents to monomers for plastics—real-world items that influence work and life outside the lab.
To keep things running smoothly, chemists weigh the risks of each reagent. DIC scores points for giving consistent results and being less sensitive to water than some rivals. Labs like that reliability, especially when scaling up production or working under tight deadlines. Despite its reputation as reliable, every worker knows: fixating on precision reduces exposure. Breathing in its fumes or spilling it on skin brings real health risks, so labs enforce gloves, fume hoods, and careful handling.
Speaking from experience, the sharp, almost eye-watering smell of DIC reminds chemists not to get careless. Some reactions with DIC spit out ureas as waste products, so storing and disposing of waste becomes part of the routine. Environmental agencies watch this kind of chemistry closely. The push to clean up science means industries have to rethink how DIC and similar chemicals fit into a more sustainable picture.
Some labs now try alternatives like carbodiimides with less toxic profiles or inventing new coupling agents that skip over messy byproducts altogether. Teaching younger scientists about the broader impact of these choices matters as much as mastering a reaction scheme. Choosing a smart reagent turns into a lesson about weighing performance, price, and responsibility.
Working with DIC gave me an appreciation for behind-the-scenes tools powering discovery. While it isn’t flashy, knowing the pieces that fit into new medicines or materials helps everyone—from students to professionals—see how everyday science decisions ripple through health, safety, and the planet. Staying informed and choosing wisely sets a higher bar for the whole field.
N,N-Diisopropylcarbodiimide shows up in laboratories and chemical manufacturers under the formula C7H16N2. Its structure reflects a backbone where two isopropyl groups tie into a carbodiimide functional group, a sequence you’ll see written as (iPr)2N=C=N. This molecule often gets shortened to DIC in synthetic chemistry circles, but that mouthful of a name—N,N-Diisopropylcarbodiimide—reminds you of the two isopropyl fragments attached to a nitrogen each.
Chemists reach for DIC often. The blend of carbon, hydrogen, and nitrogen does more than fill a textbook; it solves everyday problems in peptide synthesis. By connecting amino acids into chains, DIC works behind the scenes as a dehydrating agent. The formula matters here since those isopropyl arms give DIC both reactivity and enough bulk to tweak selectivity—points anyone running a reaction pays attention to.
Simplicity in the formula translates right into usability. DIC, with its straightforward atomic lineup, lets chemists drive efficient reactions without handing headaches on waste or clean-up. The molecule doesn't bring out urea-type byproducts as readily as some others in its field, like dicyclohexylcarbodiimide (DCC). This means less time filtering out sludge and more time making products. Having worked with both, I definitely notice the difference in how easily DIC clears up in a work-up.
I saw graduate students get tripped up by stubborn byproducts during peptide coupling runs. Once DIC replaced DCC, those bottlenecks eased. The smooth post-reaction phase matters, especially for folks who rely on consistent results day in, day out.
While DIC’s formula brings a level of efficiency, it also carries responsibility. Vapors smell sharp, and skin contact can trigger irritation. In my old lab, a single spill proved how quickly the liquid can seep through gloves. Storing DIC with clear labeling and using fume hoods helps keep exposure to a minimum. Smart chemistry means thinking past what a formula does at the bench—considering personal protective gear and ventilation as much as reagents and glassware.
Waste disposal rules for DIC draw from its nitrogen core and hydrocarbon arms. Regulatory documents, including Europe’s REACH database and OSHA, flag DIC for careful disposal with compatible organic waste streams. Tracking usage and confirming responsible recycling keeps chemical makers in line with growing demands for greener chemistry practices.
People in pharmaceuticals, materials science, and academic labs keep finding fresh roles for DIC. Patents showcase its value not just in traditional peptide syntheses, but also in forming new plastics and drug candidates. Advances in green chemistry keep pushing researchers to weigh the structure of molecules like DIC for both utility and impact. I’ve watched as biochemists challenge suppliers to deliver cleaner, safer alternatives—but practicality and strong yields still mean DIC stays relevant.
In short, knowing the formula C7H16N2 puts a powerful tool in the hands of chemists. Staying informed about both its uses and best practices helps lift the standard whether working on the next crucial medication or a simple reaction setup for tomorrow’s experimenters.
N,N-Diisopropylcarbodiimide, often called DIC, shows up in many organic syntheses, mostly as a coupling agent. This stuff doesn’t get as much attention in safety talks as some other reagents, but the risks don’t take a back seat. Chemical burns stand out because DIC reacts strongly with water and skin, leading to blisters, swelling, pain, and potential long-term injury. A simple splash can bring a pretty rough day.
Some folks ignore the dangers of inhalation, but even a quick whiff can start trouble — headaches, sore throats, or worse if vapors get strong. Sensitization remains another serious threat. After repeated handling, even a tiny amount might cause a big allergic response. Chronic exposure makes the risks stack up. From first-hand experience, just being in a closed lab where someone spilled a few drops made breathing tougher and left everyone’s eyes watering.
Goggles never leave my side in synthetic chemistry work, but with DIC, standard eye protection can fall short. Full splash-proof goggles plus a face shield give extra security. Nitrile gloves should go double-layered, since thin ones degrade fast with DIC contact. Always check glove integrity before starting the weighing or transfer. Even the best gloves fail with unnoticed pinholes.
Lab coats need long sleeves and decent thickness. I keep a spare on hand whenever the risk of splashing gets high. Once DIC splattered on a colleague’s sleeve, the quick removal of the coat saved hours in first aid — no exaggeration. Closed footwear is a must in any lab, but with DIC, shoe covers add useful insurance, especially if carrying large volumes.
Strong ventilation doesn’t just improve comfort. Fume hoods suck away vapors and keep the rest of the room safer, especially if accidents spill or reactions run out of control. One time, a forgotten open vial of DIC cleared out half the lab; having an efficient hood stopped the incident from becoming more serious.
Storage sometimes feels like an afterthought, but DIC needs dark, dry spaces, tightly sealed. It reacts with water, so damp basements or badly closed containers make things dicey. Label containers with clear hazard stickers and never leave transfer bottles lying around. Segregate DIC from acids, bases, oxidizers, and anything else known to react or decompose violently.
Spills demand quick and confident action. Absorb minor drops with appropriate pads, then scoop the waste into tightly capped containers for disposal. Flush tools and surfaces with lots of water, but remember: the drain won’t always handle DIC by itself. Ask your local hazardous chemical team for help.
Safe disposal starts before anything leaves the workbench. Collect DIC waste in proper glassware, cap it securely, and use the designated hazardous waste pickup. Never mix DIC waste with other solvents unless you know their compatibility — mishaps cost time, health, and sometimes jobs.
Nobody learns these safety habits from just a binder or a poster. Real understanding comes from experience and sharing stories, both successes and close calls. Supervisors, postdocs, and teaching assistants need open, honest communication so newcomers pick up safe habits early. Taking shortcuts with DIC only proves the old saying true: the lab keeps no secrets for long.
N,N-Diisopropylcarbodiimide, commonly known as DIC, shows up often in the chemistry world, especially in peptide synthesis. Its use gets talked about, but safe storage tends to slip through the cracks. It’s not just about following rules—storing it the right way keeps you, your workspace, and your research safe. The chemical itself can react with water and can trigger fires if it catches the wrong conditions, so a laid-back attitude just doesn’t work here.
From my years in the lab, the most effective approach is to treat DIC with respect right from the moment the bottle arrives. The bottle needs to stay tightly sealed. You can’t let moisture creep inside, since DIC can break down in the presence of water and may even produce gas that forces the container open. No one wants that surprise.
DIC belongs in a cool, dry place, away from direct sunlight. Heat speeds up unwanted reactions. Some folks tuck their bottle away in a flammable storage cabinet—this comes as standard practice in most chemical labs and keeps things contained in case of accidents. Never leave a bottle sitting by the windowsill or on a bench near a heating element.
It helps to store DIC in a container made from material that won’t break down or corrode when exposed to the chemical. Original containers usually do fine. Avoid transferring it unless absolutely needed. If transfer comes up, use glass or HDPE containers and relabel them clearly. Mixing with acidic substances or oxidizers could lead to hazardous reactions, so always keep it away from acids, bases, and anything that might trigger a runaway reaction.
DIC has a reputation for giving off a strong and often irritating odor. Properly ventilated storage areas make a difference here, so aim for a spot with a fume hood or dedicated exhaust. Never underestimate the impact of strong fumes, even with a sealed bottle.
Never shrug off the importance of labelling. Each bottle should bear not just the chemical name but also the date received and date opened. Frequent checks help spot discoloration, crystal formation, or leaking. At the first sign of trouble, consult your lab’s chemical safety officer and don’t take risks trying to handle degraded material.
Whenever you handle DIC, gloves and eye protection aren’t optional. Avoid breathing in fumes and wash hands after handling, even if you’ve just moved the bottle. If you’re a manager or team lead, regular safety talks never go to waste—reminders help everyone keep sharp.
Only withdraw the amount you need. Excess gets wasted, but even worse, sitting leftovers up the risk of accidents. Old or excess DIC should get handled as hazardous waste, with coordinated pickup or disposal in line with local regulations. Protecting both people and the environment starts the moment those bottles hit your loading dock.
Good habits turn into second nature after a while. Secure storage means more peace of mind and far fewer headaches. Practical strategies like clear labels, secure doors, and regular check-ins make a difference. That way, research can move forward—and nobody has to worry about their safety in the process.
N,N-Diisopropylcarbodiimide feels like a mouthful, but most researchers just call it DIC. In any mid-sized research lab, bottles of this reagent crowd the shelves. I still remember my first time running a peptide coupling reaction in grad school and pulling DIC off the shelf, hoping for a straightforward day. It smells, it stings the nose, and you respect its power the way you might size up a bracing cup of black coffee on a Monday morning. It matters because DIC improves the efficiency and quality of tons of reactions, not just the textbook ones.
Peptide bond formation builds the backbone for synthetic biology, pharmaceuticals, even materials science. Whenever my peers tackled custom peptides, they reached for DIC along with additives like HOBt. DIC helps bring together carboxylic acids and amines, letting chemists build up proteins or bioactive molecules piece by piece. It stands out since it avoids the harsh conditions that older methods brought — working at room temperature, without strong acids or bases. For labs aiming to create designer peptides on the fly, this makes everything smoother. The byproduct, a urea derivative, falls out of solution or can be washed away with a bit of water. I always found cleanup comparably easy.
Amides catch the spotlight, but DIC shows its flexibility whenever someone wants to make esters. Methylation or ethylation of carboxylic acids happens faster, with fewer side reactions, if DIC gets involved. In my time working with fragrance molecules, this shortcut saved hours. You avoid water-sensitive reagents and move through reaction steps with more confidence. Chemists working on large-scale flavors, fragrances, or fine chemicals all point to DIC because you get consistent results and fewer purification headaches.
Not many people outside synthetic chemistry realize all the quirky rings that drive drug discovery. Heterocycles — those nitrogen or oxygen-rich rings — appear again and again in drug candidates. DIC steps in for cyclizations, often closing rings between carboxylic acids and amines. My old advisor would pull out DIC for complicated heterocycle synthesis, appreciating how you could scale up with minor tweaks. Organic chemists care about reliability, and DIC holds its own.
Every tool brings downsides. DIC’s reputation includes allergic reactions with repeated exposure. Keeping good gloves and proper ventilation in place kept me and my colleagues safe across hundreds of runs. It works with many acids and amines, but if the starting materials get too bulky or tricky, sometimes things grind to a halt, or side reactions pile up. In those cases, shifting to a different coupling reagent, like EDC or HATU, solves the problem. Still, most labs keep DIC as their first-line option for many jobs.
As more chemists push toward greener synthesis, the industry wants less hazardous waste and cheaper, reliable processes. DIC wins people over since its byproducts wash away with water and don’t leach much toxicity downstream. Teams developing automated peptide synthesizers still design around DIC for solid-phase reactions. By teaching newer chemists solid safety habits and careful planning, we keep DIC useful and minimize headaches. It’s tough to imagine life in organic synthesis without this scrappy, tried-and-true reagent.
| Names | |
| Preferred IUPAC name | N,N'-di(propan-2-yl)carbodiimide |
| Other names |
DIC Diisopropylcarbodiimide N,N′-Diisopropylcarbodiimide N,N-Diisopropylcarbodiimide 1,3-Diisopropylcarbodiimide |
| Pronunciation | /ɛnˌɛn daɪ.aɪ.səˌproʊpɪlˌkɑːr.boʊˈdaɪ.ɪ.maɪd/ |
| Identifiers | |
| CAS Number | 693-13-0 |
| Beilstein Reference | 1209285 |
| ChEBI | CHEBI:53076 |
| ChEMBL | CHEMBL156420 |
| ChemSpider | 16619 |
| DrugBank | DB07716 |
| ECHA InfoCard | ECHA InfoCard: 100.009.236 |
| EC Number | 221-728-2 |
| Gmelin Reference | 110287 |
| KEGG | C06501 |
| MeSH | D003670 |
| PubChem CID | 7834 |
| RTECS number | FF8750000 |
| UNII | YG7I39P40F |
| UN number | UN3272 |
| CompTox Dashboard (EPA) | DTXSID5020707 |
| Properties | |
| Chemical formula | C7H16N2 |
| Molar mass | 126.22 g/mol |
| Appearance | Colorless to yellow liquid |
| Odor | Amine-like |
| Density | 0.811 g/mL at 25 °C |
| Solubility in water | insoluble |
| log P | 2.6 |
| Vapor pressure | <0.1 hPa (20 °C) |
| Acidity (pKa) | 36.00 (H₂O, conj. acid) |
| Basicity (pKb) | 3.86 |
| Magnetic susceptibility (χ) | -56.2·10⁻⁶ cm³/mol |
| Refractive index (nD) | 1.416 |
| Viscosity | 4.02 mPa·s at 25 °C |
| Dipole moment | 2.127 D |
| Thermochemistry | |
| Std molar entropy (S⦵298) | 372.7 J·mol⁻¹·K⁻¹ |
| Std enthalpy of formation (ΔfH⦵298) | −144.3 kJ·mol⁻¹ |
| Std enthalpy of combustion (ΔcH⦵298) | -2906 kJ mol⁻¹ |
| Hazards | |
| GHS labelling | GHS02, GHS07 |
| Pictograms | GHS02,GHS07 |
| Signal word | Warning |
| Precautionary statements | P210, P261, P280, P303+P361+P353, P305+P351+P338, P405, P501 |
| Flash point | 62 °C |
| Autoignition temperature | The autoignition temperature of N,N-Diisopropylcarbodiimide is **390°C**. |
| Lethal dose or concentration | LD₅₀ (oral, rat): 409 mg/kg |
| LD50 (median dose) | LD50 (median dose) = 424 mg/kg (rat, oral) |
| NIOSH | WX8575000 |
| PEL (Permissible) | PEL: Not established |
| REL (Recommended) | 0.005 ppm |
| IDLH (Immediate danger) | No IDLH established |
| Related compounds | |
| Related compounds |
N,N′-Dicyclohexylcarbodiimide 1-Ethyl-3-(3-dimethylaminopropyl)carbodiimide Carbonyldiimidazole Dicyclohexylurea |
