2-Aminobenzolsulfonsure

Bezeichnung:2-Aminobenzolsulfonsure

CAS-Nr88-21-1

Englisch Name:Aniline-2-sulfonic acid

CBNumberCB1484656

SummenformelC6H7NO3S

Molgewicht173.19

MOL-Datei88-21-1.mol

Synonyma

2-Aminobenzolsulfonsure

2-Aminobenzolsulfonsure physikalisch-chemischer Eigenschaften

Schmelzpunkt	300 °C
Siedepunkt	363.26℃[at 101 325 Pa]
Dichte	1.342 (estimate)
Dampfdruck	0Pa at 25℃
Brechungsindex	1.5500 (estimate)
storage temp.	Keep in dark place,Inert atmosphere,Room temperature
Löslichkeit	3.565g/L in organic solvents at 20 ℃
Aggregatzustand	Crystalline Powder
pka	2.48(at 25℃)
Farbe	White to beige
Wasserlöslichkeit	sparingly soluble
Merck	14,6882
BRN	1309204
InChIKey	ZMCHBSMFKQYNKA-UHFFFAOYSA-N
LogP	0 at 23℃
CAS Datenbank	88-21-1(CAS DataBase Reference)
NIST chemische Informationen	Aniline-o-sulfonic acid(88-21-1)
EPA chemische Informationen	o-Aminobenzenesulfonic acid (88-21-1)

Sicherheit

Kennzeichnung gefährlicher	C
R-Sätze:	34
S-Sätze:	26-36/37/39-45-28A
RIDADR	UN 2585 8/PG 3
WGK Germany	3
RTECS-Nr.	DB4727700
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29214200

Gefahreninformationscode (GHS)

Aniline-2-sulfonic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R34:Verursacht Verätzungen.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Chemische Eigenschaften
LIGHT BROWN FINE CRYSTALLINE POWDER
Definition
ChEBI: An aminobenzenesulfonic acid carrying an amino group at position 2.
Vorbereitung Methode
2-Aminobenzenesulfonic acid (Aniline-2-sulfonic acid) is obtained from 2-nitrothiophenol by boiling in a mixture of dioxane and water (ratio 20:1) for seven hours; the yield is 86.7% of theory. The acid can also be produced as follows: 2-chloronitrobenzene is reacted with sodium disulfide in aqueous alcoholic solution to form 2,2'-dinitrodiphenyl disulfide. After having been dissolved in a mixture of hydrochloric acid and nitric acid this is oxidized with chlorine to form 2-nitrobenze- nesulfonyl chloride, which is then hydrolyzed with soda solution and finally reduced with iron turnings. Alternatively 2,2'-dinitrodiphenyl disulfide can first be reduced to 2,2'- diaminodiphenyl disulfide and then oxidized with hydrogen peroxide in aqueous sulfuric acid to 2-aminobenzenesulfonic acid.
2,2'- Diamino-diphenyldisulfide can also be arrived at by alkaline hydrolysis of benzothiazole or mercaptobenzothiazole, followed by oxidation with hydrogen peroxide. The additional oxidation leading to 2-aminobenzenesulfonic acid can be performed in alkaline solution. Thus the synthesis starting from benzothiazole can be carried out exclusively in alkaline solution in a single reactor. Yield: 70%, based on benzothiazole.
Allgemeine Beschreibung
Light brown powder.
Air & Water Reaktionen
Soluble in water.
Reaktivität anzeigen
Aniline-2-sulfonic acid is an amino acid. Reacts weakly with both acids and bases.
Brandgefahr
Flash point data for Aniline-2-sulfonic acid are not available, however Aniline-2-sulfonic acid is probably combustible.
Flammability and Explosibility
Non flammable
läuterung methode
Crystallise orthanilic acis from aqueous solution, containing 20mL of conc HCl per L, then crystallise it from distilled water, and dry it in a vacuum desiccator over Sicapent (m 315o). When an aqueous solution is chilled below 13.5o, the hydrated form of the acid is obtained. It is used for the determination of nitrite and nitrate. The S-benzylisothiuronium salt has m 137o (from H2O). [Wertheim Org Synth Coll Vol II 471 1943, Beilstein 14 H 681, 14 I 714, 14 II 429, 14 III 1896, 14 IV 2638.]

Aniline-2-sulfonic acid Upstream-Materialien And Downstream Produkte

2-Aminobenzolsulfonsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

88-21-1, Aniline-2-sulfonic acid Verwandte Suche:

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