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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 7419Generated: October 23, 2026

3-Aminobenzoic Acid

M-AMINOBENZOIC ACID · Maba · 3-aminobenzoic · META AMINO BENZOIC ACID · 3-Abz-OH · H-3-ABZ-OH · H-M-ABZ-OH · Benzaminicacid

https://huagongshe.com/en/chemical/7419

3-Aminobenzoic Acid molecular structure

Identifiers & Physical Properties

CAS No.99-05-8
Molecular formulaC7H7NO2
Average molar mass137.14 g/mol
Monoisotopic mass137.04767847 g/mol
SMILESNc1cccc(C(=O)O)c1
InChIKeyXFDUHJPVQKIXHO-UHFFFAOYSA-N
PubChem CID7419
ChEMBLCHEMBL307782
ChEBICHEBI:42682
EC No.202-724-4
DTXSIDDTXSID3059183

Chemical & Physical Properties

XLogP0.1
Topological polar surface area63.3
Hydrogen bond donors2
Hydrogen bond acceptors3
Rotatable bonds1
Heavy atoms10
Formal charge0
Complexity136
LogP (partition coefficient)0.65
Solubility5.9 mg/mL at 15 °C>20.6 [ug/mL] (The mean of the results at pH 7.4)5.9 g/L (15°C)5.9 g/L (15 ºC)
Melting point173 °C178-180 °C(lit.)
Vapor pressure0.000278 [mmHg]
Physical DescriptionSolid[Merck Index]
Ionization EfficiencyPositive3.252.7Agilent XCTElectrospray ionizationformic acid (5.3nM)
Boiling point251.96°C (rough estimate)
Density1,51 g/cm3
Refractive index1.5323 (estimate)
Flash point150 °C
Storage conditionsKeep in dark place,Inert atmosphere,Room temperature
pKa (acidity coefficient)4.78(at 25℃)
Physical statePowder
ColorWhite-brownish to beige-brown
OdorOdorless
Merck14,421
BRN471603
Henry's law constant3.7×106 mol/(m3Pa) at 25℃, Ebert et al. (2023)
InChI1S/C7H7NO2/c8-6-3-1-2-5(4-6)7(9)10/h1-4H,8H2,(H,9,10)
InChIKeyXFDUHJPVQKIXHO-UHFFFAOYSA-N
SMILESNc1cccc(c1)C(O)=O
LogP (partition coefficient)0.650
CAS DataBase Reference99-05-8(CAS DataBase Reference)
EWG's Food Scores1
FDA UNIIG2X3B3O37U
NIST Chemistry ReferenceBenzoic acid, 3-amino-(99-05-8)
EPA Substance Registry SystemBenzoic acid, 3-amino- (99-05-8)
UNSPSC Code41116107
NACRESNA.24
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302-H315-H319-H335
GHS precautionary statementsP280a-P304+P340-P405-P501a-P280-P301+P312+P330-P304+P340+P312-P305+P351+P338-P337+P313-P261-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313
Hazard symbolsXn,Xi
Risk statements (R)22-36/37/38
Safety statements (S)26-37/39-36
Water hazard class (WGK)2
RTECS numberDG1225000
TSCA inventory statusTSCA listed
Customs code29224995
Storage class11 - Combustible Solids
REACH registrationsActive

Safety & Regulations

GHS classificationWarningH302 (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 exposureRespiratory 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 (click each P-code to see the statement)Aggregated GHS information provided per 52 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website.
Regulatory informationChemical: Benzoic acid, 3-amino-Status: Active Update: 07-02-2018 https://echa.europa.eu/registration-dossier/-/registered-dossier/22177Benzoic acid, 3-amino-: Does not have an individual approval but may be used under an appropriate group standard
Other safety informationEvaluation - Chemicals that are unlikely to require further regulation to manage risks to environment
Hazards summaryMay cause irritationMay induce methemoglobinemia[Alfa Aesar MSDS]
Hazard Classes and CategoriesAcute Tox. 4 (78.8%)Skin Irrit. 2 (98.1%)Eye Irrit. 2 (98.1%)STOT SE 3 (96.2%)
Adverse effectsMethemoglobinemia - The presence of increased methemoglobin in the bloodthe compound is classified as secondary toxic effect
Water hazard class (WGK)2
TSCA inventory statusTSCA listed
RTECS numberDG1225000
Customs code29224995
Risk statements (R)22-36/37/38
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXn,Xi
Safety statements (S)26-37/39-36
Storage class11 - Combustible Solids
GHS hazard statementsH302-H315-H319-H335
REACH registrationsActive
GHS precautionary statementsP280a-P304+P340-P405-P501a-P280-P301+P312+P330-P304+P340+P312-P305+P351+P338-P337+P313-P261-P264-P302+P352+P332+P313+P362+P364-P305+P351+P338+P337+P313

Applications & Uses

Uses

3-Aminobenzoic acid is used as an intermediate for dyes, pesticides and other organic synthesis.

Uses

It finds its application as crystalline Intermediate for azo dyes, pharmaceuticals, and X-ray contrast media.

General Description

3-Aminobenzoic acid, popularly known as Mesalazine Impurity E, is a related compound of anti-inflammatory agent Mesalazine. Mesalazine belongs to a group of drugs referred to as aminosalicylates and is generally used in the treatment of inflammatory bowel disease.Pharmaceutical secondary standards for application in quality control, provide pharma laboratories and manufacturers with a convenient and cost-effective alternative to the preparation of in-house working standards.

Preparation & Synthesis

Preparation

3-Aminobenzoic acid is prepared by the reduction of 3-nitrobenzoic acid and used in dye syntheses. Its derivative N,N-dimethyl-3- aminobenzoic acid is also used in the production of dyes.