PRODUCT IDENTIFICATION

CLASSIFICATION

EXTRA NOTES

PHYSICAL AND CHEMICAL PROPERTIES

REFRACTIVE INDEX

EXTERNAL LINKS & GENERAL DESCRIPTION

Wikipedia Linking - Benzenesulfonic acid

Google Scholar Search

Drug Information Portal (U.S. National Library of Medicine) - Metanilic acid

PubChem Compound Summary - Metanilic acid

KEGG (Kyoto Encyclopedia of Genes and Genomes) -  Metanilic acid

http://www.ebi.ac.uk/ -  Metanilic acid

http://www.ncbi.nlm.nih.gov/ -  Metanilic acid

http://www.clri.org/
Biodegradation of studies on Metanilic acid:
Synonyms : 3-Aminobenzenesulfonic acid, Aniline, Meta Sulphonic Acid.
Metanilic acid is an isomer of sulfanilic acid with the sulfonic acid group at position 2. Hence, 162¥ìM concentration of Metanilic acid degradation studies was carried out in O.curviceps BDU 92191 to further confirm the biodecolourization potential of the marine cyanobacterium.

http://www.1911encyclopedia.org/
Benzene sulphonic acid, C6H 5 S0 3 H,11H 2 O, crystallizes in small plates and is very deliquescent. Benzene sulphochloride, C6H5 S02C1, is a colourless fuming liquid which boils at 120° C. (10 mm.). The aminobenzene sulphonic acids, particularly the meta and para compounds, are of importance owing to their employment in the colour industry. The direct sulphonation of aniline yields the para acid, sulphanilic acid, C 6 H 4 (NH 2)(SO 3 H), which crystallizes in small plates and is sparingly soluble in cold water. When fused with caustic potash it yields aniline, whilst oxidation with chromic acid yields benzoquinone. In constitution it is probably to be regarded ?NH3 as a cyclic ammonium salt, C 6 H 4 When diazotized in NS0 3 / . acid solution and coupled with dimethyl aniline it yields helianthine, the sodium salt of which is used as an indicator. Metanilic acid C6H4(NH2) (S03H) [1.3], which crystallizes in prisms, is formed b y the reduction of meta-nitrobenzene sulphonic acid and is used in the preparation of various azo dyes.

Local:
Sulfanilic acid is a light grey powder or crystals; slightly soluble in water, alcohol, and ether, soluble in hot water and fuming hydrochloric acid, char at 288 - 300 C. Sulfanilic acid is a sulfonated aniline product. Aniline is the starting material in the dye manufacturing industry. Sulfonic acid and its salts present in organic dyes provide useful function of water solubility and or improve the washfastness of dyes due to their capabiltity of binding more tightly to the fabric. Sulfanilic acid is used as an intermediate for colorants (dyes, food colors, optical brightening agents), medicines and other organic synthesis. It is a component of griess reagent to determine nitrous acid. Sulfanilic acid is converted to sulfanilamide which is one of the basic materials to produce antibacterial sulfa drugs. There is an isomer called metanilic acid, sulfonic group at position 2. It is used in the manufacture of azo dyes and in synthesis sulfa drugs.

APPEARANCE

99.0% min

HAZARD OVERVIEW

May cause methemoglobinemia. Harmful if swallowed, inhaled, or absorbed through the skin. Causes burns by all exposure routes. Target Organs: Blood, blood forming organs, eyes, skin, mucous membranes

GHS

PICTOGRAMS

HAZARD STATEMENTS

H302-H312-H332

P STATEMENTS

P280

RISK PHRASES

20/21/22

SAFETY PHRASES

23-28