3-Amino-benzolsulfonsäure

Bezeichnung:3-Amino-benzolsulfonsäure

CAS-Nr121-47-1

Englisch Name:Metanilic acid

CBNumberCB7143612

SummenformelC6H7NO3S

Molgewicht173.19

MOL-Datei121-47-1.mol

Synonyma

3-Aminobenzolsulfonsure

3-Amino-benzolsulfonsäure

3-Amino-benzolsulfonsäure physikalisch-chemischer Eigenschaften

Schmelzpunkt	>300 °C (lit.)
Dichte	1.69
Brechungsindex	1.5500 (estimate)
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
Löslichkeit	ethanol: very slightly soluble(lit.)
pka	3.73(at 25℃)
Aggregatzustand	Powder
Farbe	White to grayish-beige
Wasserlöslichkeit	slightly soluble
Merck	14,5927
BRN	473264
Stabilität	Stable. Combustible. Incompatible with strong oxidizing agents, acids.
LogP	-2.77 at 21℃
CAS Datenbank	121-47-1(CAS DataBase Reference)
NIST chemische Informationen	Metanilic acid(121-47-1)
EPA chemische Informationen	Metanilic acid (121-47-1)

Sicherheit

Kennzeichnung gefährlicher	Xn
R-Sätze:	20/21/22
S-Sätze:	23-28-28A-25
RIDADR	3261
WGK Germany	1
RTECS-Nr.	OY2300000
TSCA	Yes
HazardClass	IRRITANT
HS Code	29214200

Gefahreninformationscode (GHS)

Metanilic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
S-Sätze Betriebsanweisung:
S23:Gas/Rauch/Dampf/Aerosol nicht einatmen(geeignete Bezeichnung(en) vom Hersteller anzugeben).
S28:Bei Berührung mit der Haut sofort abwaschen mit viel . . . (vom Hersteller anzugeben).
S25:Berührung mit den Augen vermeiden.
Chemische Eigenschaften
white powder
Verwenden
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.
Verwenden
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.
Definition
ChEBI: 3-aminobenzenesulfonic acid is an aminobenzenesulfonic acid. It is a conjugate acid of a 3-aminobenzenesulfonate.
Vorbereitung Methode
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.
Allgemeine Beschreibung
White powder. Small colorless needles; toxic.
Air & Water Reaktionen
Water insoluble [Hawley].
Reaktivität anzeigen
Metanilic acid is an amino acid. Reacts weakly with both acids and bases.
Hazard
See aniline.
Brandgefahr
Flash point data for Metanilic acid are not available, however Metanilic acid is probably combustible.
Flammability and Explosibility
Non flammable
läuterung methode
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 Upstream-Materialien And Downstream Produkte

3-Amino-benzolsulfonsäure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

121-47-1, Metanilic acid Verwandte Suche:

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