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3-Aminobenzoic acid
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Description
3-Aminobenzoic Acid
Other Names: Meta-aminobenzoic acid, m-Aminobenzoic acid, MABA
CAS Number: 99-05-8
Sum Formula: C₇H₇NO₂
Molar Mass: 137.14 g/mol
Appearance: White to off-white crystalline powder
3-Aminobenzoic acid is an aromatic compound containing both an amino group and a carboxylic acid group in the meta position on a benzene ring. It is commonly used as an intermediate in organic synthesis, including dyes, resins, and specialty chemical production. The presence of both acidic and basic functional groups makes it reactive in a wide range of substitution and condensation reactions.
Chemical and Physical Properties
Density: ~1.43 g/cm³
Melting Point: 174–178°C
Boiling Point: Decomposes before boiling
Solubility in Water: Slightly soluble (~1.6 g/L at 25°C)
Solubility in Organic Solvents: Soluble in ethanol, methanol, and acetone
Odor: Odorless
Stability: Stable under recommended storage conditions
Applications
Used as a building block in the synthesis of azo dyes, pigments, and resins
Employed in the production of corrosion inhibitors and polymer additives
Serves as a reagent or intermediate in laboratory organic synthesis
Used in technical processes involving aromatic amine derivatization
Safety
Signal Word: Warning
H302 (78.8%): Harmful if swallowed [Warning Acute toxicity, oral]
H315 (98.1%): Causes skin irritation [Warning Skin corrosion/irritation]
H319 (98.1%): Causes serious eye irritation [Warning Serious eye damage/eye irritation]
H335 (96.2%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposure; Respiratory tract irritation]
P261, P264, P264+P265, P270, P271, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P403+P233, P405, and P501
First Aid Measures
Eye Contact: Rinse immediately with plenty of water for at least 15 minutes. Seek medical attention
Skin Contact: Wash with soap and water. Remove contaminated clothing
Inhalation: Move to fresh air. Seek medical attention if symptoms occur
Ingestion: Rinse mouth with water. Do not induce vomiting. Seek medical help
Handling and Storage
Store in a cool, dry, well-ventilated area in tightly sealed containers
Protect from moisture, strong oxidizing agents, and incompatible materials
Avoid dust formation and use PPE when handling bulk quantities