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

1,8-Dihydroxynaphthylene-3,6-disulfonic acid

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Koch acid Suppliers

China 14 India 3 Switzerland 1 United Kingdom 1 Global 19

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: 8033
Advantage: 55

Lanzhou Angeli Biochemical Technology Co., Ltd.

Tel: 0931-8235634 13321316780
Fax: +86(931) 4873122
Email: 1455540579@qq.com
Country: China
ProdList: 959
Advantage: 55

Dideu Industries Group Limited

Tel: +86-29-89586680 +86-15129568250
Email: 1026@dideu.com
Country: China
ProdList: 29220
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: 52867
Advantage: 58

Shaanxi Dideu Medichem Co. Ltd

Tel: +86-29-87569266 15319487004
Fax: 029-88380327
Email: 1015@dideu.com
Country: China
ProdList: 2263
Advantage: 58

Shaanxi Dideu Medichem Co. Ltd

Tel: 029-81124267 15229202216
Fax: 029-88380327
Email: 1073@dideu.com
Country: China
ProdList: 10011
Advantage: 58

career henan chemical co

Tel: +86-0371-86658258
Email: sales@coreychem.com
Country: China
ProdList: 29914
Advantage: 58

GIHI CHEMICALS CO.,LIMITED

Tel: +8618058761490
Email: info@gihichemicals.com
Country: China
ProdList: 49999
Advantage: 58

PT CHEM GROUP LIMITED

Tel: +86-85511178 +86-85511178
Email: peter68@ptchemgroup.com
Country: China
ProdList: 35453
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:

1-Naphthylamine 1-Aminonaphthalene-6-sulfonic acid 1-NAPHTHYLAMINE-3,6,8-TRISULFONIC ACID DISODIUM SALT HYDRATE 1,3,(6,7)-Naphthalenetrisulfonic acid trisodium salt hydrate PONCEAU 6R 8-Aminonaphthalene-1,6-disulfonic acid 1,6-Naphthalenedisulfonic acid Koch acid Peri acid

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

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