Metanilic acid
Metanilic acid Basic information
- Product Name:
- Metanilic acid
- Synonyms:
-
- 3-AMINOBENZENESULFONIC ACID
- 3-amino-benzenesulfonicaci
- Aminobenzenesulfonic acid
- aminobenzenesulfonicacid
- Benzenesulfonic acid, 3-amino-
- benzenesulfonicacid,3-amino
- Benzenesulfonicacid,3-amino-
- Kyselina anilin-3-sulfonova
- CAS:
- 121-47-1
- MF:
- C6H7NO3S
- MW:
- 173.19
- EINECS:
- 204-473-6
- Product Categories:
-
- Intermediates of Dyes and Pigments
- INORGANIC & ORGANIC CHEMICALS
- Mol File:
- 121-47-1.mol
Metanilic acid Chemical 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.)
- form
- Powder
- pka
- 3.73(at 25℃)
- color
- White to grayish-beige
- Water Solubility
- slightly soluble
- Merck
- 14,5927
- BRN
- 473264
- Stability:
- Stable. Combustible. Incompatible with strong oxidizing agents, acids.
- LogP
- -2.77 at 21℃
- CAS DataBase Reference
- 121-47-1(CAS DataBase Reference)
- NIST Chemistry Reference
- Metanilic acid(121-47-1)
- EPA Substance Registry System
- Metanilic acid (121-47-1)
Safety Information
- Hazard Codes
- Xn
- Risk Statements
- 20/21/22
- Safety Statements
- 23-28-28A-25
- RIDADR
- 3261
- WGK Germany
- 1
- RTECS
- OY2300000
- TSCA
- Yes
- HazardClass
- IRRITANT
- HS Code
- 29214200
MSDS
- Language:English Provider:3-Aminobenzenesulfonic acid
- Language:English Provider:SigmaAldrich
- Language:English Provider:ACROS
- Language:English Provider:ALFA
Metanilic acid Usage And Synthesis
Chemical Properties
white powder
Uses
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.
Uses
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.
Definition
ChEBI: 3-aminobenzenesulfonic acid is an aminobenzenesulfonic acid. It is a conjugate acid of a 3-aminobenzenesulfonate.
Production Methods
Metanilic acid can be obtained by sulfonation of aniline sulfate with oleum and boric acid at 20 – 50 ℃. The yield is 98%. For industrial production, however, nitrobenzene is sulfonated to m-nitrobenzenesulfonic acid, which is then reduced either with iron or catalytically with hydrogen. Crude 3-aminobenzenesulfonic acid can be used directly, either as a solution or dried, to obtain 3-aminophenol by alkali fusion. It is not sufficiently pure for use in dye manufacture, however. Therefore the crude solution is acidified; after filtration the product thus obtained is of satisfactory purity.
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.
Hazard
See aniline.
Fire Hazard
Flash point data for Metanilic acid are not available, however Metanilic acid is probably combustible.
Flammability and Explosibility
Non flammable
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.]
Metanilic acid Preparation Products And Raw materials
Preparation Products
Raw materials
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