6-Hydroxynaphthalene-2-sulphonic acid Struktur

6-Hydroxynaphthalin-2-sulfonsure

Bezeichnung:6-Hydroxynaphthalin-2-sulfonsure

CAS-Nr93-01-6

Englisch Name:6-Hydroxynaphthalene-2-sulphonic acid

CBNumberCB7301210

SummenformelC10H8O4S

Molgewicht224.23

MOL-Datei93-01-6.mol

Synonyma

6-Hydroxynaphthalin-2-sulfonsure

6-Hydroxynaphthalin-2-sulfonsure physikalisch-chemischer Eigenschaften

Schmelzpunkt	>300 °C(lit.)
Siedepunkt	335.63°C (rough estimate)
Dichte	1.4643 (rough estimate)
Brechungsindex	1.5400 (estimate)
pka	0.41±0.40(Predicted)
CAS Datenbank	93-01-6(CAS DataBase Reference)
NIST chemische Informationen	2-Naphthalenesulfonic acid, 6-hydroxy-(93-01-6)
EPA chemische Informationen	2-Naphthalenesulfonic acid, 6-hydroxy- (93-01-6)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	26-36
WGK Germany	3

Gefahreninformationscode (GHS)

6-Hydroxynaphthalene-2-sulphonic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
Chemische Eigenschaften
2-Hydroxynaphthalene- 6 -sulfonic acid [93-01-6]. (6-hydroxynaphthalene-2-sulfonic acid), Schaeffer acid, C10H8O4S, Mr 224.23, is readily soluble in water, from which it can be recrystallized as the monohydrate (mp 129℃). The sodium salt is sparingly soluble in cold water (1.7 %) but forms a 30 % solution at 80℃. Coupling with diazo compounds results in substitution in the 1-position as does treatment with bromine, nitrous acid, or oleum. Fusion with potassium hydroxide gives 2,6-dihydroxynaphthalene, amination gives 2- aminonaphthalene-6-sulfonic acid, and sulfonation (20 % oleum, 25℃) results in 2-hydroxynaphthalene-1,6-disulfonic acid.
Verwenden
2-Hydroxynaphthalene-6-sulfonic acid is used as a coupling component for a wide range of azo dyes, e.g., C.I. Acid Orange 12, C.I. Food Yellow 3, and C.I. Food Orange 2. It is also used as an intermediate for more highly substituted dye components and synthetic tanning agents. The 1-nitroso derivative forms an iron complex (C.I. Acid Green 1) which was formerly used as a wool dye.
synthetische
2-Naphthol is added to a mixture of sulfuric acid and sodium sulfate, and the reaction is continued at 90 C for 12 h. After pouring the reaction mixture into water, the sodium salt of the product is precipitated by addition of salt and filtered at 60℃ to separate the isomers.

6-Hydroxynaphthalene-2-sulphonic acid Upstream-Materialien And Downstream Produkte

6-Hydroxynaphthalin-2-sulfonsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

93-01-6, 6-Hydroxynaphthalene-2-sulphonic acid Verwandte Suche:

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