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130-23-4

Basic Information
CAS No.: 130-23-4
Name: 1-Amino-8-naphthol-4,6-disulfonic acid
Article Data: 4
Molecular Structure:
Molecular Structure of 130-23-4 (1-Amino-8-naphthol-4,6-disulfonic acid)
Formula: C10H9NO7S2
Molecular Weight: 319.316
Synonyms: 1-Naphthol-3,5-disulfonicacid, 8-amino- (6CI);1-Amino-8-hydroxynaphthalene-4,6-disulfonic acid;1-Amino-8-naphthol-4,6-disulfonic acid;4-Amino-5-hydroxy-1,7-naphthalenedisulfonic acid;4-Amino-5-naphthol-1,7-disulfonic acid;8-Amino-1-hydroxy-3,5-naphthalenedisulfonic acid;8-Amino-1-naphthol-3,5-disulfonic acid;K acid;NSC 7110;
EINECS: 204-982-3
Density: 1.88 g/cm3
Solubility: 20g/L at 26.4℃
Appearance: light brown powder
Hazard Symbols: Xi,T
Risk Codes: R41
PSA: 171.75000
LogP: 3.36380
Synthetic route
17894-99-4

8-amino-naphthalene-1,3,5-trisulfonic acid

furan-2,3,5(4H)-trione pyridine (1:1)

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

Conditions
ConditionsYield
at 170 - 175℃; unter Druck;
17894-99-4

8-amino-naphthalene-1,3,5-trisulfonic acid

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

Conditions
ConditionsYield
With alkali hydroxide at 150 - 220℃;
90-20-0

4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

141236-48-8, 35418-05-4

3-nitrocinnamoyl chloride

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

N,N'-bis-{3-[2-(8-hydroxy-4,6-disulfo-[1]naphthylcarbamoyl)-vinyl]-phenyl}-urea

Conditions
ConditionsYield
Reduktion und Behandlung des Reaktionsprodukts mit Phosgen bei Gegenwart von Natriumacetat in waessr. Loesung;
14368-49-1

p-nitrobenzenediazonium

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

3,4-diamino-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions
ConditionsYield
With acid Reduktion des Farbstoffs mit Zinn oder Zinn(II)-chlorid in Salzsaeure;
5957-03-9

Diphenyl-4,4'-bis-diazonium

130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

123726-98-7

4,4'-diamino-5,5'-dihydroxy-6,6'-biphenyl-4,4'-diyl-bis-azo-bis-naphthalene-1,7-disulfonic acid

Conditions
ConditionsYield
With sodium carbonate
130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

100-05-0

4-nitrobenzenediazonium chloride

3,4,6-triamino-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions
ConditionsYield
nachf. Kuppeln mit Benzoldiazoniumchlorid in saurer und alkal. Loesung und Reduktion des entst. Bisazofarbstoffs mit Zinn(II)-chlorid und konz. Salzsaeure;
130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

100-05-0

4-nitrobenzenediazonium chloride

4-amino-8-(4-amino-phenylazo)-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions
ConditionsYield
With acid und Reduzieren des Reaktionsprodukts mit Natriumsulfid;
130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

5-amino-2,3,6,8-tetrabromo-[1,4]naphthoquinone

Conditions
ConditionsYield
With sulfuric acid; bromine; acetic acid
130-23-4

4-amino-5-hydroxy-1,7-naphthalenedisulfonic acid

4-chloro-5-hydroxy-naphthalene-1,7-disulfonic acid

Conditions
ConditionsYield
durch Austausch von NH2 gegen Cl nach dem Sandmeyerschen Verfahren;
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  • 130-23-4  CAS NO.130-23-4

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    130-23-4 CAS NO.130-23-4

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Specification

The 1-Amino-8-naphthol-4,6-disulfonic acid ,its cas register number is 130-23-4.It also can be called as l,7-Naphthalenedisulfonic acid, 4-amino-5-hydroxy- and the IUPAC name about this chemical is 4-Amino-5-hydroxynaphthalene-1,7-disulfonic acid .It belongs to the Intermediates of Dyes and Pigments. Raw materials is 1-Naphthylamine-4,6,8-trisulfonic acid .

Following are the chemical properties about 1-Amino-8-naphthol-4,6-disulfonic acid :(1)#H bond acceptors: 8 ; (2)#H bond donors: 5 ; (3)#Freely Rotating Bonds: 4 ; (4)Polar Surface Area: 115.97 Å2 ; (5)Index of Refraction: 1.764 ; (6)Molar Refractivity: 70.15 cm3 ; (7)Molar Volume: 169.8 cm3 ; (8)Polarizability: 27.81x10-24cm3 ; (9)Surface Tension: 104.7 dyne/cm

The 1-Amino-8-naphthol-4,6-disulfonic acid is a light brown powder, it slightly soluble in cold water and soluble in hot water, also it can soluble in soda ash or caustic soda solution, after react with ferric chloride it will be  yellow green.It can be used as azo dyes, reactive dyes and organic pigment intermediates, mainly used for the production of cationic dyes, reactive red K-2G and so on.

Preparition methods: The 1-Amino-8-naphthol-4,6-disulfonic acid can be got from the 1-naphthylamine-4,6,8-3 acid by neutralization, alkali, acidification. The 1-naphthylamine-4,6,8-3 acid solution with sodium carbonate and sodium were naphthylamine 3, then at 178-184 °C under liquid alkali fusion with sodium hydroxide; then use sulfuric acid in the 0.7- 0.78MPa obtained under acid 4h. The finished product is rice brown powder, K acid content of 80%.

This chemical can be described computed from structure:
(1)Canonical SMILES: C1=CC(=C2C=C(C=C(C2=C1N)O)S(=O)(=O)O)S(=O)(=O)O
(2)InChI: InChI=1S/C10H9NO7S2/c11-7-1-2-9(20(16,17)18)6-3-5(19(13,14)15)4-8(12)10(6)7/h1-4,12H,11H2,(H,13,14,15)(H,16,17,18) 
(3)InChIKey: ZUQOBHTUMCEQBG-UHFFFAOYSA-N