ChemicalBook > CAS DataBase List > 2-Amino-4,8-naphthalenedisulfonic acid

2-Amino-4,8-naphthalenedisulfonic acid

Product Name
2-Amino-4,8-naphthalenedisulfonic acid
CAS No.
131-27-1
Chemical Name
2-Amino-4,8-naphthalenedisulfonic acid
Synonyms
acidiv;C ACID;kyselinac;AMINO C ACID;CASSELLA ACID;JACS-131-27-1;2-Amino-4,8-naphthal;4,8-disulfo-2-naphthalamine;4,8-Disulfo-2-naphthylamine;2-Ethylamino-4,8-dinaphthalene
CBNumber
CB5200922
Molecular Formula
C10H9NO6S2
Formula Weight
303.31
MOL File
131-27-1.mol
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2-Amino-4,8-naphthalenedisulfonic acid Property

Boiling point:
205.8°C (rough estimate)
Density 
1.6329 (rough estimate)
refractive index 
1.7330 (estimate)
storage temp. 
2-8°C
pka
-1.16±0.40(Predicted)
CAS DataBase Reference
131-27-1(CAS DataBase Reference)
EPA Substance Registry System
1,5-Naphthalenedisulfonic acid, 3-amino- (131-27-1)
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Safety

Risk Statements 
36/37/38
Safety Statements 
26-36/37/39
Toxicity
rat,LD50,oral,11400mg/kg (11400mg/kg),"Prehled Prumyslove Toxikologie; Organicke Latky," Marhold, J., Prague, Czechoslovakia, Avicenum, 1986Vol. -, Pg. 1058, 1986.
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Hazard and Precautionary Statements (GHS)

Symbol(GHS)
Signal word
Warning
Hazard statements

H302Harmful if swallowed

H315Causes skin irritation

H319Causes serious eye irritation

H335May cause respiratory irritation

Precautionary statements

P261Avoid breathing dust/fume/gas/mist/vapours/spray.

P264Wash hands thoroughly after handling.

P264Wash skin thouroughly after handling.

P270Do not eat, drink or smoke when using this product.

P271Use only outdoors or in a well-ventilated area.

P280Wear protective gloves/protective clothing/eye protection/face protection.

P301+P312IF SWALLOWED: call a POISON CENTER or doctor/physician IF you feel unwell.

P302+P352IF ON SKIN: wash with plenty of soap and water.

P304+P340IF INHALED: Remove victim to fresh air and Keep at rest in a position comfortable for breathing.

P305+P351+P338IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing.

P330Rinse mouth.

P332+P313IF SKIN irritation occurs: Get medical advice/attention.

P337+P313IF eye irritation persists: Get medical advice/attention.

P362Take off contaminated clothing and wash before reuse.

P403+P233Store in a well-ventilated place. Keep container tightly closed.

P405Store locked up.

P501Dispose of contents/container to..…

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N-Bromosuccinimide Price

Biosynth Carbosynth
Product number
FA40997
Product name
2-Amino-4,8-naphthalenedisulfonic acid
Packaging
100g
Price
$60
Updated
2021/12/16
Biosynth Carbosynth
Product number
FA40997
Product name
2-Amino-4,8-naphthalenedisulfonic acid
Packaging
250g
Price
$100
Updated
2021/12/16
Biosynth Carbosynth
Product number
FA40997
Product name
2-Amino-4,8-naphthalenedisulfonic acid
Packaging
500g
Price
$180
Updated
2021/12/16
Matrix Scientific
Product number
094178
Product name
3-Aminonaphthalene-1,5-disulfonic acid
Purity
92+%
Packaging
1g
Price
$189
Updated
2021/12/16
Biosynth Carbosynth
Product number
FA40997
Product name
2-Amino-4,8-naphthalenedisulfonic acid
Packaging
1kg
Price
$240
Updated
2021/12/16
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2-Amino-4,8-naphthalenedisulfonic acid Chemical Properties,Usage,Production

Chemical Properties

2-Aminonaphthalene-4,8-disulfonic acid [131-27-1]. (3-aminonaphthalene-1,5-disulfonic acid), Cassella acid, C acid, C10H9NO6S2, Mr 303.32, and its salts are readily soluble in water. Reduction with sodium amalgam desulfonates 2-Aminonaphthalene-4,8-disulfonic acid to give 2-aminonaphthalene-8-sulfonic acid, whereas boiling with dilute sulfuric acid results in desulfonation and hydrolysis to give 2- hydroxynaphthalene-4-sulfonic acid. Alkali fusion (KOH, 215℃) produces 2-amino-4-hydroxynaphthalene-8-sulfonic acid.

Uses

2-Amino-4,8-naphthalenedisulfonic Acid is used in green preparation method of direct blended blue D 3GL.

Uses

Cassella acid is an important diazo component for yellow direct and reactive dyes.

Production Methods

The iron(II) salt of 3-nitronaphthalene-1,5-disulfonic acid (nitro-Armstrong acid) is reduced with iron in dilute acid. A claimed improvement involves isolation of nitro-Armstrong acid from the nitration products of naphthalene-1,5-disulfonic acid as the crystalline magnesium salt prior to catalytic reduction to C acid.

2-Amino-4,8-naphthalenedisulfonic acid Preparation Products And Raw materials

Raw materials

FUMING SULFURIC ACID Naphthalene Magnesium carbonate Nitric acid

Preparation Products

Pigment Red 53:1 Direct Black 103 Direct Blend Blue Reactive Yellow KE-4RN PROCION BLUE H-5R Direct Yellow 86 2-NAPHTHYLAMINE-4,6,8-TRISULFONIC ACID Direct Blue 71 Reactive Yellow 3 Reactive Blue 222 Reactive Yeiiow M-3RE Direct Blending Yellow D-3RNL
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View Lastest Price from 2-Amino-4,8-naphthalenedisulfonic acid manufacturers

Henan Bao Enluo International TradeCo.，LTD
Product
2-Amino-4,8-naphthalenedisulfonic acid 131-27-1
Price
US $30.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
1000tons
Release date
2023-08-04
Shaanxi Dideu Medichem Co. Ltd
Product
2-Amino-4,8-naphthalenedisulfonic acid 131-27-1
Price
US $0.10/KG
Min. Order
1KG
Purity
99.0%
Supply Ability
1000 tons
Release date
2020-01-02
Career Henan Chemical Co
Product
2-Amino-4,8-naphthalenedisulfonic acid 131-27-1
Price
US $1.00/kg
Min. Order
1kg
Purity
99%
Supply Ability
Customized
Release date
2018-12-22

131-27-1, 2-Amino-4,8-naphthalenedisulfonic acidRelated Search:

Stearic acid Sodium diphenylamine-4-sulfonate 6-Aminopenicillanic acid 6-Aminocaproic acid PHENOLDISULFONIC ACID 2-AMINODIETHYLMALONATE Sodium xylenesulfonate 1-Naphthylamine Folic acid Citric acid Indigo Carmine Ethyl 2-(Chlorosulfonyl)acetate Methyl 3-aminocrotonate Dihydroergotoxine mesylate Glycine DL-ALPHA-AMINOPIMELIC ACID L-ASPARTIC ACID Ascoric Acid

  • 2-Ethylamino-4,8-dinaphthalene
  • 5-Naphthalenedisulfonicacid,3-amino-1
  • acidiv
  • beta-naphthylamine-4,8-disulfonicacid
  • beta-naphthylaminedisulfonicacid
  • kyselina2-naftylamin-4,8-disulfonova
  • kyselinac
  • 2-Ethylamino-4,8-dinaphthalenedisulfonicacid
  • 3-amino-1,5-naphthalenedisulfonic
  • 3-amino-5-naphthalenedisulfonicacid
  • 3-aminonaphthalene-1,5-disulphonicacid
  • 4,8-disulfo-2-naphthalamine
  • CASSELLA ACID
  • C ACID
  • 2-NAPHTHYLAMINE-4,8-DISULFONIC ACID
  • 2 NAPHTHYLAMINE 4,8 DISULPHONIC ACID
  • AMINO C ACID
  • 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID
  • 3-aminonaphthalene-1,5-disulfonic acid
  • 2-Naphthylamine-4,8-Disulphonic Acid (C-Acid)
  • 2-Naphthylamine-4,8-Disulfonic Acid Amino C Acid (or Cassella Acid)
  • 1-AMINONAPHTHALENE-4,8-DISULPHONICACID
  • 3-AMINO-1,5-NAPHTHALENEDISULFONIC ACID 50%
  • 2-Amino-4,8-naphthalenedisulfonic acid
  • 4,8-Disulfo-2-naphthylamine
  • 7-Amino-1,5-naphthalenedisulfonic acid
  • 2-Aminonaphthalene-4,8-disulfonic acid
  • 3-azanylnaphthalene-1,5-disulfonic acid
  • 2-Amino-4,8-naphthal
  • JACS-131-27-1
  • 1,5-Naphthalenedisulfonic acid, 3-amino-
  • 3-aminonaphthalene-1,5-disulfonicaci
  • 2-Amino-4,8-naphthalenedisulfonic acid ISO 9001：2015 REACH
  • 3-Aminonaphthalin-1,5-disulfonsure
  • TIANFU-CHEM -2-Amino-4,8-naphthalenedisulfonic acid
  • 131-27-1
  • H2NC10H5SO3H2
  • Intermediates of Dyes and Pigments