METANILIC ACID

PRODUCT IDENTIFICATION

CAS NO. 121-47-1

METANILIC ACID

EINECS NO. 204-473-6
FORMULA H2NC6H4SO3H
MOL WT. 173.19
H.S. CODE 2921.42.2100
TOXICITY  
SYNONYMS 3-Aminobenzenesulfonic Acid; m-Anilinesulfonic Acid;
Kyselina Anilin-3-Sulfonova (Czech); Kyselina Metanilova (Czech); 3-Aminobenzolsulfonsäure (German); ácido 3-aminobencenosulfónico (Spanish); Acide 3-aminobenzenesulfonique (French); Metanilic acid; 1-Aminobenzene-3-sulfonic acid; Aminobenzenesulfonic acid; m-Aminobenzenesulfonic acid;
SMILES c1(cc(ccc1)N)S(O)(=O)=O

CLASSIFICATION

 

EXTRA NOTES

 

PHYSICAL AND CHEMICAL PROPERTIES

PHYSICAL STATE Beige powder
MELTING POINT Decomposes
BOILING POINT  
SPECIFIC GRAVITY 1.69
SOLUBILITY IN WATER slightly soluble
AUTOIGNITION  
pKa 3.75
VAPOR DENSITY  
log P -2.08 (Octanol-water)
VAPOR PRESSURE 2.02E-07 (mmHg at 25 C)
HENRY LAW CONSTANT 8.89E-13 (atm-m3/mole at 25 C)
OH RATE CONSTANT 2.32E-11 (cm3/molecule-sec at 25 C Atmospheric )
NFPA RATINGS Health: 2; Flammability: 0; Reactivity: 0

REFRACTIVE INDEX

 
FLASH POINT

 

STABILITY Stable under ordinary conditions


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, 162M 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.

SALES SPECIFICATION

APPEARANCE

Beige powder
PURITY

99.0% min

INSOLUBLES 0.1% max
TRANSPORTATION
PACKING  
HAZARD CLASS  
UN NO.

 

SAFETY INFORMATION

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

 

SIGNAL WORD Warning

PICTOGRAMS

HAZARD STATEMENTS

H302-H312-H332

P STATEMENTS

P280

EC DIRECTIVES

 

HAZARD CODES

RISK PHRASES

20/21/22

SAFETY PHRASES

23-28




PRICE INFORMATION