1-Amino-2-naphthol-4-sulfonic acid

Bezeichnung:1-Amino-2-naphthol-4-sulfonic acid

CAS-Nr116-63-2

Englisch Name:1-Amino-2-naphthol-4-sulfonic acid

CBNumberCB5345948

SummenformelC10H9NO4S

Molgewicht239.25

MOL-Datei116-63-2.mol

1-Amino-2-naphthol-4-sulfonic acid physikalisch-chemischer Eigenschaften

Schmelzpunkt	290 °C (dec.)(lit.)
Dichte	1.4338 (rough estimate)
Brechungsindex	1.6500 (estimate)
storage temp.	Store below +30°C.
Löslichkeit	DMSO (Slightly), Methanol (Slightly)
pka	-0.49±0.40(Predicted)
Aggregatzustand	Powder
Farbe	White to light pink
Wasserlöslichkeit	insoluble
Merck	14,454
BRN	2697469
Stabilität	Stable. Incompatible with strong bases, acid chlorides, acid anhydrides, strong oxidizing agents.
InChIKey	RXCMFQDTWCCLBL-UHFFFAOYSA-N
CAS Datenbank	116-63-2(CAS DataBase Reference)
NIST chemische Informationen	1-Naphthalenesulfonic acid,4-amino-3-hydroxy-(116-63-2)
EPA chemische Informationen	1-Naphthalenesulfonic acid, 4-amino-3-hydroxy- (116-63-2)

Sicherheit

Kennzeichnung gefährlicher	Xi
R-Sätze:	36/37/38
S-Sätze:	37/39-26
RIDADR	3265
WGK Germany	3
RTECS-Nr.	QK1292000
TSCA	Yes
HazardClass	IRRITANT
PackingGroup	III
HS Code	29222100

Gefahreninformationscode (GHS)

1-Amino-2-naphthol-4-sulfonic acid Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
S-Sätze Betriebsanweisung:
S37/39:Bei der Arbeit geeignete Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
Chemische Eigenschaften
1-Amino-2-hydroxynaphthalene-4-sulfonic acid [116-63-2]. (4-amino-3-hydroxynaphthalene-1-sulfonic acid), B€oniger acid, C10H9NO4S, Mr 239.2, is obtained as white or gray needles of the hemihydrate, which is only sparingly soluble in hot water. The alkali-metal salts are soluble in water, but the solutions slowly oxidize in air. Oxidation with nitric acid gives 1,2- naphthoquinone-4-sulfonic acid.
Verwenden
1-Amino-2-naphthol-4-sulfonic acid can be used in determination of phosphate.
Verwenden
4-Amino-3-hydroxy-1-naphthalenesulfonic acid is used as mordant dyes and acid dyes intermediate.
Definition
ChEBI: 4-amino-3-hydroxynaphthalene-1-sulfonic acid is a naphthalenesulfonic acid and an aminonaphthalene. It has a role as a mutagen. It is functionally related to a 2-naphthol.
Vorbereitung Methode
2-Naphthol is dissolved in dilute aqueous sodium hydroxide and precipitated in finely divided form by addition of sulfuric acid at 5℃. Sodium nitrite solution is added to the slightly alkaline suspension, followed by sulfuric acid to effectthe nitrosation while the temperature is held at 5 – 8℃. The suspension of 1-nitroso2-naphthol is neutralized with aqueous sodium hydroxide; a solution of sodium bisulfite is then added. The temperature is allowed to rise to 20℃, and the soluble bisulfite addition complex is formed. Excess sulfuric acid is then added and the temperature is raised to 40℃, whereupon reductive rearrangement takes place and the product slowly crystallizes at 50℃. Filtration and washing give the product as a 25 % paste in 80 % yield. All plant items and reactants must be free from iron to avoid complex formation.
läuterung methode
Purify it by warming 15g of the acid, 150g of NaHSO3 and 5g of Na2SO3(anhydrous) with 1L of water to ca 90o, shaking until most of the solid had dissolved, then filtering hot. The precipitate obtained by adding 10mL of conc HCl to the cooled filtrate is collected, washed with 95% EtOH until the washings are colourless, and is dried under vacuum over CaCl2. It is stored in a dark-coloured bottle, in the cold [Chanley et al. J Am Chem Soc 74 4347 1952]. [Beilstein 14 IV 2825.]

1-Amino-2-naphthol-4-sulfonic acid Upstream-Materialien And Downstream Produkte

1-Amino-2-naphthol-4-sulfonic acid Anbieter Lieferant Produzent Hersteller Vertrieb Händler.

116-63-2, 1-Amino-2-naphthol-4-sulfonic acid Verwandte Suche:

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