5-Aminonaphthalin-2-sulfonsure

Bezeichnung:5-Aminonaphthalin-2-sulfonsure

CAS-Nr119-79-9

Englisch Name:1-Aminonaphthalene-6-sulfonic acid

CBNumberCB6228406

SummenformelC10H9NO3S

Molgewicht223.25

MOL-Datei119-79-9.mol

Synonyma

5-Aminonaphthalin-2-sulfonsure

5-Aminonaphthalin-2-sulfonsure physikalisch-chemischer Eigenschaften

Schmelzpunkt	>300°C
Dichte	1.3588 (rough estimate)
Dampfdruck	0Pa at 25℃
Brechungsindex	1.6500 (estimate)
storage temp.	Refrigerator
Löslichkeit	soluble100mg/mL, clear, brown (1N NH4OH)
Aggregatzustand	Solid
pka	pK1: 3.80 (25°C)
Farbe	Purple
Wasserlöslichkeit	1g/L(16 ºC)
Merck	14,2350
BRN	1819887
Dissoziationskonstante	0 at 39℃
CAS Datenbank	119-79-9(CAS DataBase Reference)
NIST chemische Informationen	1-Naphthylamine-6-sulfonic acid(119-79-9)
EPA chemische Informationen	2-Naphthalenesulfonic acid, 5-amino- (119-79-9)

Sicherheit

R-Sätze:	36/37/38
S-Sätze:	26-36/37/39-24/25
RIDADR	1759
WGK Germany	1
RTECS-Nr.	QK1285000
TSCA	Yes
HazardClass	8
PackingGroup	III
HS Code	29309090

Gefahreninformationscode (GHS)

1-Aminonaphthalene-6-sulfonic 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.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
Chemische Eigenschaften
Purple Solid. 1-Aminonaphthalene-6-sulfonic acid [119- 79-9]. (5-aminonaphthalene-2-sulfonic acid), 1,6-Cleve’s acid, C10H9NO3S, Mr 223.24, crystallizes from boiling water as plates of the dihydrate. Its sodium, potassium, and calcium salts are all readily soluble in water, but the barium salt is only sparingly soluble. Sulfonation with 10 % oleum yields 1-aminonaphthalene-4,6-disulfonic acid. Caustic fusion gives 5- amino-2-hydroxynaphthalene, and Bucherertype hydrolysis gives 1-hydroxynaphthalene-6- sulfonic acid.
Verwenden
Intermediate of dyestuff
Verwenden
5-Amino-2-naphthalenesulfonic acid (1,6-Cleve′s acid) was used in the synthesis of nitrate reductase and detection of nitrate reduction by anaerobic bacteria.
Verwenden
Fluorescent reagent.
Vorbereitung Methode
Sulfonation of 1-naphthylamine with concentrated sulfuric acid at 130℃ gives mainly 1-aminonaphthalene-6-sulfonic acid. However, the latter is always made, together with the 1,7-isomer, by nitration of naphthalene-2-sulfonic acid to give the mixed 5- and 8- nitronaphthalene-2-sulfonic acids follwed by reduction to ‘‘mixed Cleve’s acids.’’ A b-sulfonation mass is diluted with sulfuric acid, then 67.5 % nitric acid is added slowly at 34℃. After being quenched and neutralized with calcium carbonate, the filtered liquor is reduced by boiling with iron powder, slight acidity being maintained with sulfuric acid. After basification with magnesia the iron residues are filtered off and the filtrate is evaporated until the magnesium salt of the product crystallizes on cooling. Filtration followed by washing with magnesium sulfate gives a 34 % yield of the magnesium salt of 1,6-Cleve’s acid. Purification by dissolution in hot water, acidification, and filtration of the free acid while hot reduce the yield to 25 % based on naphthalene.
Definition
ChEBI: 5-aminonaphthalene-2-sulfonic acid is an aminonaphthalenesulfonic acid.
Allgemeine Beschreibung
The crystal structure of 5-amino-2-naphthalenesulfonic acid (1,6-Cleve′s acid) depicted the presence of a sulfonate-aminium group zwitterion.

1-Aminonaphthalene-6-sulfonic acid Upstream-Materialien And Downstream Produkte

5-Aminonaphthalin-2-sulfonsure Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

119-79-9, 1-Aminonaphthalene-6-sulfonic acid Verwandte Suche:

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