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Koch acid

Product Name
Koch acid
CAS No.
117-42-0
Chemical Name
Koch acid
Synonyms
Kochaci;2-Naphthyl;NSC 227195;Koch acid ISO 9001:2015 REACH;3,6,8-Trisulfo-1-naphthylamine;6-naphthalenetrisulfonic acid, 8-amino-3;8-amino-1,3,6-naphthalenetrisulfonic acid;1-Aminonaphthalene-3,6,8-trisulfonic acid;3,6-Naphthalenetrisulfonic acid, 8-amino-1;8-aminonaphthalene-1,3,6-trisulphonic acid
CBNumber
CB8874779
Molecular Formula
C10H9NO9S3
Formula Weight
383.37
MOL File
117-42-0.mol
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Koch acid Property

Density 
1.974
pka
-1.62±0.40(Predicted)
EPA Substance Registry System
1,3,6-Naphthalenetrisulfonic acid, 8-amino- (117-42-0)
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Hazard and Precautionary Statements (GHS)

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N-Bromosuccinimide Price

American Custom Chemicals Corporation
Product number
FRL0001498
Product name
8-AMINO-1,3,6-NAPHTHALENETRISULFONIC ACID
Purity
95.00%
Packaging
5MG
Price
$503.87
Updated
2021/12/16
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Koch acid Chemical Properties,Usage,Production

Chemical Properties

1-Aminonaphthalene-3,6,8-trisulfonic acid [117-42-0]. (8-aminonaphthalene-1,3,6- trisulfonic acid), Koch acid, T acid, C10H9NO9S3, Mr 383.36, and its alkali-metal salts are readily soluble in water. The solutions are unusual for this class of compound in that they exhibit no fluorescence. Hydrolysis with dilute sulfuric acid produces 1-hydroxynaphthalene-3,6,8-trisulfonic acid, whereas diazotization followed by acid hydrolysis results in formation of the corresponding sultone. Reduction with zinc and alkali desulfonates 1-Aminonaphthalene-3,6,8-trisulfonic acid to give 1-amino-naphthalene-3,6-disulfonic acid. Amination gives 1,3-diaminonaphthalene-6,8- disulfonic acid.

Uses

Apart from caustic fusion to give H acid, the other main use is the production of chromotropic acid by treatment with strong caustic under pressure.

Production Methods

Naphthalene in sulfuric acid solution is treated with gradual addition of 65 % oleum and temperature profiling (to 160℃) to optimize formation of the 1,3,6-trisulfonic acid. A mixture of sulfuric acid and nitric acids is added slowly at 40℃ to form 1-nitronaphthalene-3,6,8-trisulfonic acid (nitro-Koch acid) which is converted to neutral liquor by liming out. The liquor is reduced with iron powder in the presence of acetic acid and, after removal of iron residues, the crude product is isolated, as the acid calcium – sodium salt. This is purified by dissolution with sodium carbonate and removal of calcium carbonate. The trisodium salt liquor is concentrated before direct use in H acid manufacture. To obtain pure Koch acid, the 1-nitro3,6,8-trisulfonic acid can be isolated before reduction. The reduction step can alternatively be carried out by hydrogenation of the aqueous solution of nitro-Koch acid in the presence of a nickel catalyst.

Koch acid Preparation Products And Raw materials

Raw materials

Preparation Products

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Koch acid Suppliers

Chengdu AstaTech Trading Co., Ltd./AstaTech (Chengdu) Pharma. Co., Ltd.
Tel
+86-28-85122536 85324413
Fax
+86-28-85326443
Email
market@astatech.cn
Country
China
ProdList
8026
Advantage
55
Lanzhou Angeli Biochemical Technology Co., Ltd.
Tel
0931-8235634 13321316780
Fax
+86(931) 4873122
Email
1455540579@qq.com
Country
China
ProdList
958
Advantage
55
Dideu Industries Group Limited
Tel
+86-29-89586680 +86-15129568250
Email
1026@dideu.com
Country
China
ProdList
23325
Advantage
58
Dayang Chem (Hangzhou) Co.,Ltd.
Tel
571-88938639 +8617705817739
Fax
+86-571-88938652,+86-571- 88492614
Email
info@dycnchem.com
Country
China
ProdList
52849
Advantage
58
Shaanxi Dideu Medichem Co. Ltd
Tel
029-61856358 15229202216
Fax
029-88380327
Email
1020@dideu.com
Country
China
ProdList
10011
Advantage
58
career henan chemical co
Tel
+86-0371-86658258 +8613203830695
Email
sales@coreychem.com
Country
China
ProdList
29886
Advantage
58
Suzhou ARTK Medchem Co., Ltd.
Tel
+86-512-68323658 +86-18168183658
Email
sales1@artkmedchem.com
Country
China
ProdList
39004
Advantage
58
GIHI CHEMICALS CO.,LIMITED
Tel
+8618058761490
Email
info@gihichemicals.com
Country
China
ProdList
49979
Advantage
58
PT CHEM GROUP LIMITED
Tel
Email
peter68@ptchemgroup.com
Country
China
ProdList
35425
Advantage
58
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View Lastest Price from Koch acid manufacturers

Shaanxi Dideu Medichem Co. Ltd
Product
Koch acid 117-42-0
Price
US $0.00-0.00/KG
Min. Order
1KG
Purity
99.0%+
Supply Ability
100 tons
Release date
2019-12-30
Career Henan Chemical Co
Product
Koch acid 117-42-0
Price
US $7.00/g
Min. Order
1g
Purity
99%
Supply Ability
JD 01
Release date
2019-09-15

117-42-0, Koch acidRelated Search:


  • 8-amino-1,3,6-naphthalenetrisulfonic acid
  • 8-aminonaphthalene-1,3,6-trisulphonic acid
  • 2-Naphthyl
  • 3,6-Naphthalenetrisulfonic acid, 8-amino-1
  • 6-naphthalenetrisulfonic acid, 8-amino-3
  • 1-AMinonapthelene 3,6,8 trisulfonic acid disodiuM
  • 3,6,8-Trisulfo-1-naphthylamine
  • NSC 227195
  • 1,3,6-Naphthalenetrisulfonic acid,8-amino-
  • 1-Aminonaphthalene-3,6,8-trisulfonic acid
  • Kochaci
  • Koch acid ISO 9001:2015 REACH
  • 117-42-0
  • Intermediates of Dyes and Pigments