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Metanilic acid

Chemical Name:
Metanilic acid
3-AMINOBENZENESULFONIC ACID;phenylsulfamic acid;3-SULFOANILINE;ANILINE-3-SULFONIC ACID;aminobenzenesulfonicacid;metanilic;Metanilsure;Metanilc Acid;METANILIC ACID;Aniline-3-sulf
Molecular Formula:
Molecular Weight:
MOL File:
MSDS File:

Metanilic acid Properties

Melting point >300 °C (lit.)
Density 1.69
refractive index 1.5500 (estimate)
storage temp. Keep in dark place,Inert atmosphere,Room temperature
solubility ethanol: very slightly soluble(lit.)
pka 3.73(at 25℃)
form Powder
color White to grayish-beige
Water Solubility slightly soluble
Merck 14,5927
BRN 473264
Stability Stable. Combustible. Incompatible with strong oxidizing agents, acids.
CAS DataBase Reference 121-47-1(CAS DataBase Reference)
EWG's Food Scores 1
NIST Chemistry Reference Metanilic acid(121-47-1)
EPA Substance Registry System Metanilic acid (121-47-1)


Risk and Safety Statements

Signal word  Warning
Hazard statements  H320-H302-H312-H332-H302+H312+H332
Precautionary statements  P280-P261-P264-P270-P271-P301+P312+P330-P302+P352+P312+P362+P364-P304+P340+P312-P305+P351+P338+P337+P313-P501-P280h-P301+P312a-P304+P340-P321-P501a
Hazard Codes  Xn
Risk Statements  20/21/22
Safety Statements  23-28-28A-25
RIDADR  3261
WGK Germany  1
RTECS  OY2300000
HazardClass  IRRITANT
HS Code  29214200

Metanilic acid price More Price(20)

Manufacturer Product number Product description CAS number Packaging Price Updated Buy
Sigma-Aldrich 165794 3-Aminobenzenesulfonic acid 97% 121-47-1 250g $78.5 2022-05-15 Buy
TCI Chemical A0265 3-Aminobenzenesulfonic Acid >99.0%(T) 121-47-1 25g $19 2022-04-27 Buy
TCI Chemical A0265 3-Aminobenzenesulfonic Acid >99.0%(T) 121-47-1 500g $81 2022-04-27 Buy
Alfa Aesar A14574 Metanilic acid, 98+% 121-47-1 100g $20.9 2021-12-16 Buy
TRC A591695 3-Aminobenzenesulfonic acid 121-47-1 25g $45 2021-12-16 Buy
Product number Packaging Price Buy
165794 250g $78.5 Buy
A0265 25g $19 Buy
A0265 500g $81 Buy
A14574 100g $20.9 Buy
A591695 25g $45 Buy

Metanilic acid Chemical Properties,Uses,Production

Chemical Properties

white powder


3-Aminobenzenesulfonic acid was used in the synthesis of cytocompatible sulfonated polyanilines. It was used in fabrication of novel glucose biosensor having large active surface area and excellent conductivity.


Metanilic acid was used in the synthesis of cytocompatible sulfonated polyanilines. It was used in fabrication of novel glucose biosensor having large active surface area and excellent conductivity. It undergoes microbial desulfonation to 3-aminophenol by Pseudomonas sp. strain S-313. It can be used to produce CN3O6(1-)*Cs(1+) and dicesium salt of N-nitrometanilic acid at temperature of 25°C.

General Description

White powder. Small colorless needles; toxic.

Air & Water Reactions

Water insoluble [Hawley].

Reactivity Profile

Metanilic acid is an amino acid. Reacts weakly with both acids and bases.


See aniline.

Fire Hazard

Flash point data for Metanilic acid are not available, however Metanilic acid is probably combustible.

Purification Methods

Crystallise the acid from water (as the hydrate), under CO2 in a semi-darkened room. The solution is photosensitive. Dry it over 90% H2SO4 in a vacuum desiccator. [Beilstein 14 H 688, 14 IV 2640.]

Synthesis of Metanilic acid from m-Toluidine
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View Lastest Price from Metanilic acid manufacturers

Image Release date Product Price Min. Order Purity Supply Ability Manufacturer
2021-07-02 Metanilic acid
US $15.00-10.00 / KG 1KG 99%+ HPLC Monthly supply of 1 ton Zhuozhou Wenxi import and Export Co., Ltd
2019-12-31 Metanilic acid
US $0.10 / KG 1KG 99.0% 1000 tons Shaanxi Dideu Medichem Co. Ltd
2019-07-06 Metanilic acid
US $1.00 / kg 1kg 95%-99% 10kg Career Henan Chemical Co
  • Metanilic acid
  • US $15.00-10.00 / KG
  • 99%+ HPLC
  • Zhuozhou Wenxi import and Export Co., Ltd
  • Metanilic acid
  • US $0.10 / KG
  • 99.0%
  • Shaanxi Dideu Medichem Co. Ltd
3-amino-benzenesulfonicaci Aminobenzenesulfonic acid Benzenesulfonic acid, 3-amino- benzenesulfonicacid,3-amino Benzenesulfonicacid,3-amino- Kyselina anilin-3-sulfonova Kyselina metanilova kyselinaanilin-3-sulfonova kyselinametanilova metanilic m-Sulfanioicacid M-AMINOBENZENESULFONIC ACID M-ANILINESULFONIC ACID METANILIC ACID ANILINE-M-SULFONIC ACID METANILIC ACID, 98+% MetanilicAcidPurified META-SULPHANILICACID Metanilsure 3-AMINOBENZENESULPHONIC ACID / METANILIC ACID METANILIC ACID pract m-Aminophenylsulfonic acid Metanilc Acid Metanilic acid, 98% 100GR m-Anilinesulfonic Acid Metanilic Acid 3-Sulfoaniline 3-AMinobenzenesulfonic acid, 98%+ Aniline-3-sulf M-SULFANILIC ACID M-SULFOANILINE 1-Aminobenzene-3-sulfonic acid for synthesis 1-Aminobenzene-3-sulfonic acid 1-aminobenzene-3-sulfonicacid 3-Aminobenzene sulphonic acid metanilic acid 77% 3-AminobenzenesuL 3-AminobenzenesulfonicAcid> Metanilic acid ISO 9001:2015 REACH Metanilic Acid pure, 98% METANILIC ACID Extra Pure 3-AMINOBENZENESULFONIC ACID aminobenzenesulfonicacid ANILINE-3-SULFONIC ACID 3-SULFOANILINE phenylsulfamic acid 121-47-1 C6H7N5O3S C6H5NHSO3H Organic Building Blocks Sulfonic/Sulfinic Acids Sulfur Compounds SULFONIC ACID Building Blocks Intermediates of Dyes and Pigments INORGANIC & ORGANIC CHEMICALS