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HomeProduct name list2-Amino-1,5-naphthalenedisulfonic acid

2-Amino-1,5-naphthalenedisulfonic acid

  • CAS NO.:117-62-4
  • Empirical Formula: C10H9NO6S2
  • Molecular Weight: 303.31
  • MDL number: MFCD00021512
  • EINECS: 204-201-6
  • SAFETY DATA SHEET (SDS)
  • Update Date: 2024-10-09 17:25:53
2-Amino-1,5-naphthalenedisulfonic acid Structural

What is 2-Amino-1,5-naphthalenedisulfonic acid?

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

The Uses of 2-Amino-1,5-naphthalenedisulfonic acid

?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.

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

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
CAS DataBase Reference 117-62-4(CAS DataBase Reference)
EPA Substance Registry System 1,5-Naphthalenedisulfonic acid, 2-amino- (117-62-4)

Safety information for 2-Amino-1,5-naphthalenedisulfonic acid

Signal word Warning
Pictogram(s)
ghs
Exclamation Mark
Irritant
GHS07
GHS Hazard Statements H319:Serious eye damage/eye irritation
Precautionary Statement Codes P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

Computed Descriptors for 2-Amino-1,5-naphthalenedisulfonic acid

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Globus Pharmachem (Para Products Pvt Ltd)

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Jagson Colorchem Limited

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Phone:+91-9879484214
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Vipul Organics Ltd

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Phone:+91-2266139999
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Bodal Chemicals Ltd

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DL INTRACHEM

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Phone:+91-9099014678
Whatsapp: +91-9099014678
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Santel Industries

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Phone:+91-7926401417
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Bhageria Industries Limited

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Macson Products

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Shree Pushkar Chemicals And Fertilisers Ltd

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