2-Amino-1,5-naphthalenedisulfonic acid Chemical Properties

Boiling point:

205.8°C (rough estimate)

Density 

1.6329 (rough estimate)

refractive index 

1.7330 (estimate)

storage temp. 

2-8°C

pka

-0.51±0.40(Predicted)

Water Solubility 

soluble

LogP

-1.85

CAS DataBase Reference

117-62-4(CAS DataBase Reference)

EPA Substance Registry System

1,5-Naphthalenedisulfonic acid, 2-amino- (117-62-4)

Safety Information

Hazard Codes 

Xi,C

Risk Statements 

36-34

Safety Statements 

26-28A

RIDADR 

1759

WGK Germany 

2

RTECS 

QJ6135000

F 

8-10

HazardClass 

8

PackingGroup 

III

Toxicity

LD50 oral in rat: 5430mg/kg

MSDS

• Language:English Provider:2-Naphthylamine-1,5-disulfonic acid
• Language:English Provider:ACROS
• Language:English Provider:SigmaAldrich

2-Amino-1,5-naphthalenedisulfonic acid Usage And Synthesis

Description

2-Aminonaphthalene-1,5-disulfonic acid [117-62-4]. 5-sulfo-Tobias acid, C10H9NO6S2, Mr 303.32, is purified by crystallization of the dipotassium salt from water. Alkali fusion results in formation of 2-amino-5-hydroxynaphthalene-1-sulfonic acid. Sulfonation (40 % oleum, 100℃) gives 2-aminonaphthalene-1,5,7-trisulfonic acid. Heating with aqueous sulfuric acid produces 2-aminonaphthalene-5- sulfonic acid. The diazo compound is converted to 2-diazo-1-hydroxynaphthalene-5-sulfonic acid on treatment with alkaline hypochlorite.

Chemical Properties

BEIGE POWDER

Uses

?As a diazo component in orange and red azo reactive dyes, 2-Amino-1,5-naphthalenedisulfonic acid gives more bathochromic shades than Tobias acid.

Production Methods

Sulfonation of Tobias acid to produce 2-aminonaphthalene-5-sulfonic acid proceeds via 2-Aminonaphthalene-1,5-disulfonic acid, which is isolated from the quenched reaction mixture with careful avoidance of desulfonation.

2-Amino-1,5-naphthalenedisulfonic acid(117-62-4)Related Product Information

• Sodium xylenesulfonate
• 6-Aminocaproic acid
• Dioctyl sulfosuccinate sodium salt
• Dihydroergotoxine mesylate
• Glycine
• Folic acid
• 2,4-Xylenesulfonic acid
• Sodium diphenylamine-4-sulfonate
• 1-Naphthylamine
• Tris(hydroxymethyl)aminomethane
• ALTRENOGEST
• Ascoric Acid
• 8-AMINO-1,5-NAPHTHALENEDISULFONIC ACID MONOSODIUM SALT
• REACTIVE RED 195
• POLYVINYL CHLORIDE, AMINATED
• 2-Naphthylamine-5,7-disulfonic acid
• 7-AMINO-1,3-NAPHTHALENEDISULFONIC ACID MONOPOTASSIUM SALT
• 7-Amino-1,3-naphthalenedisulfonic acid