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Chemical Name: 2-Amino-5-hydroxybenzoic acid
Synonyms: Anthranilic acid-5-ol
Chemical Formula: C7H7NO3
CAS Number: 89-73-6
Recognizing chemicals by both name and number matters in the lab or any place that stores substances with similar names. Misidentification can steer actions toward unsafe choices, especially with aromatic compounds like this one that share traits with pharmaceuticals, dyes, and intermediates used across multiple fields.
Hazard Statements: May cause irritation to skin, eyes, and respiratory tract
Precautionary Measures: Avoid dust formation, use only in well-ventilated areas, steer clear of inhalation or direct contact
Carelessness around chemicals known to irritate doesn’t just cause discomfort; it pushes people out of work and can lead to bigger medical bills down the road. This compound, neither as deadly as some nor as harmless as others, still deserves respect in handling. Irritation from accidental contact prompts the body’s defenses but doesn’t always mean you can shrug it off.
Main Ingredient: 2-Amino-5-hydroxybenzoic acid, purity typically above 97% in reagent grades
Once contamination gets mixed in with a sample, analysis turns unreliable and risks climb. Working with pure chemicals, even those viewed as low risk on paper, means each step—lab work, storage, disposal—carries out as intended.
Inhalation: Move person to fresh air, support breathing as needed
Skin Contact: Wash affected area with soap and water
Eye Contact: Flush with large amounts of water for at least 15 minutes
If Swallowed: Rinse mouth, seek medical help
Quick reactions make all the difference. Years of lab experience teach that people who hesitate in a spill or exposure gamble with their own recovery. Small mistakes show up as rashes and coughs, bigger ones can lodge particles deep in tissue or create hours of discomfort. Blinking red eyes or burning skin always take precedence over explanations or excuses.
Suitable Extinguishing Media: Water spray, dry chemical, foam, carbon dioxide
Hazards: During combustion, may produce toxic fumes including nitrogen oxides and carbon oxides
Protective Equipment: Full protective gear, self-contained breathing apparatus
Dry powders ignite less readily than solvents, but ignoring the risks of heat and sparks around organic acids can still land responders in dangerous situations. Toxic gases are invisible and don’t wait for good intentions; gear and planning matter as much as speed.
Spill Response: Sweep up while avoiding dust, collect in a container for disposal
Environmental Precautions: Prevent runoff into waterways
The sight of a spilled flask or powder raises heart rates in even seasoned professionals. Powders cling to shoes and drift into air vents, carrying with them both the threat to people and the risk of environmental spread. Immediate cleanup, not tomorrow’s intention, keeps the workspace from getting written up during the next inspection.
Handling: Wear proper protective equipment, keep containers tightly shut, manage in ventilated spaces
Storage: Store in a cool, dry area away from oxidizers
Stuffed cabinets and crowded benches breed carelessness. Once opened, reagents attract humidity and dust like magnets. Protective gloves and closed containers keep the workspace clean and extend the life of every chemical. I’ve seen the difference between a setup that respects each bottle and one that treats storage like a junk drawer—one is painful to clean and always short on supplies, the other runs safely and efficiently.
Engineering Controls: Use fume hood or local exhaust when dust formation is possible
Personal Protective Equipment: Nitrile gloves, safety goggles, laboratory coat
The right gear turns what might have become an emergency into a quick cleanup and a story for the break room. Rushing without goggles or relying on cheap disposable gloves never pays off, especially once the skin begins to tingle or the nose starts to sting. Making safety routine means everyone gets to go home as healthy as they arrived.
Appearance: Pale yellow to brownish solid
Melting Point: About 222-224°C
Solubility: Low in water, higher in organic solvents
Chemicals that won’t dissolve leave residues, block filters, and clog lines; those that melt or burn easily complicate every experiment. Knowing what to expect from appearance and basic behaviors keeps mix-ups to a minimum.
Chemical Stability: Stable under recommended storage conditions
Incompatible Materials: Strong oxidizing agents
Hazardous Decomposition: Nitrogen oxides, carbon oxides on decomposition
It’s tempting to think shelf-stable chemicals stay safe forever, but time, temperature, and neighbors on the shelf all push unnoticed reactions. Shelf checks and routine inspections catch problems before bottles turn to goo or pressure builds under the cap.
Routes of Exposure: Eyes, skin, inhalation, ingestion
Symptoms: Irritation, redness, coughing, nausea
Direct experience in the lab shows the difference between reading possible symptoms and living through them. The sting from a splash or a whiff of dust lingers, and recovery often needs more than cold water. Even less toxic benzoic acid derivatives can set off allergies or worsen chronic conditions for some people.
Aquatic Toxicity: Data limited; minimize release to environment
Persistence: May not degrade quickly
Eco-impact matters even in a small bench-top setup. Flushing chemicals down the drain on autopilot piles up in local streams and builds problems no one wants to pay for years later. What seems like a harmless rinse once a week, repeated everywhere, shapes future regulations and clean-up costs for entire communities.
Waste Disposal: Follow national or local legal requirements; do not release to water systems
Dumping leftovers or contaminated gloves in standard trash crosses a line. Labs that pay attention to waste—separating hazardous from regular, labeling bottles, following rules—protect everyone, from janitors to waste handlers to downstream neighbors.
Transport Classification: Treat as regulated for safety; avoid conditions that could rupture packaging
Rough handling, poorly sealed bottles, and ignored warning labels send fine powders traveling far beyond their original destination. Damaged packaging shows up as sticky dust, wet spots, or a lingering chemical smell—signs that the rules aren’t there for show. Every missed label or torn box adds risk for dozens of people along the way.
Regulation: Subject to chemical management laws in many countries, must comply with chemical workplace safety rules
Laboratories and workplaces ignore compliance at their own risk. Regulators inspect procedures, logbooks, and storage not to nitpick but to highlight habits that could hurt workers, neighbors, or the environment. Up-to-date documentation, regular audits, and shared responsibility sidestep the sort of fines or discipline that follow inattention, and safeguard reputations forged over years of careful work.
