117-42-0

Basic information

• Product Name: Koch acid
• Synonyms: 8-amino-1,3,6-naphthalenetrisulfonic acid;8-aminonaphthalene-1,3,6-trisulphonic acid;2-Naphthyl;1,3,6-Naphthalenetrisulfonic acid,8-amino-;1-Aminonaphthalene-3,6,8-trisulfonic acid;3,6-Naphthalenetrisulfonic acid, 8-amino-1;6-naphthalenetrisulfonic acid, 8-amino-3;1-AMinonapthelene 3,6,8 trisulfonic acid disodiuM
• CAS NO: 117-42-0
• Molecular Formula: C₁₀H₉NO₉S₃
• Molecular Weight: 383.37476
• EINECS: 204-188-7
• Product Categories: Intermediates of Dyes and Pigments
• Mol File: 117-42-0.mol

Chemical Properties

• Appearance: /
• Density: 1.974
• PKA: -1.62±0.40(Predicted)
• CAS DataBase Reference: Koch acid(CAS DataBase Reference)
• NIST Chemistry Reference: Koch acid(117-42-0)
• EPA Substance Registry System: Koch acid(117-42-0)

Safety Data

• Hazardous Substances Data: 117-42-0(Hazardous Substances Data)

Usage

Uses

Used in Pharmaceutical and Chemical Industries:
Koch acid is used as a reagent for the synthesis of novel drugs, dyes, and other products due to its high stability and low reactivity.
Used in Medicine:
Koch acid is used as an anti-inflammatory and analgesic agent in preclinical studies, demonstrating its therapeutic potential in the field of medicine.

InChI:InChI=1/C10H9NO9S3.3Na/c11-8-3-6(21(12,13)14)1-5-2-7(22(15,16)17)4-9(10(5)8)23(18,19)20;;;/h1-4H,11H2,(H,12,13,14)(H,15,16,17)(H,18,19,20);;;/q;3*+1/p-3

Upstream product

• 38267-31-1 8-nitronaphthalene-1,3,6-trisulphonic acid 
• 7647-01-0 hydrogenchloride 
• 408511-00-2 1,1-dioxo-2H-1λ⁶-naphth[1,8-cd]isothiazole-4,7-disulfonic acid 
• 7664-93-9 sulfuric acid 
• 86-66-8 naphthalene-1,3,6-trisulfonic acid 
• 120-94-5 1-Methylpyrrolidine 
• 91-20-3 naphthalene 

Downstream Products

• 6251-07-6 4-amino-naphthalene-2,7-disulfonic acid 
• 90-20-0 4-amino-5-hydroxy-2,7-naphthalenedisulfonic acid 
• 86-66-8 naphthalene-1,3,6-trisulfonic acid 
• 2234-13-1 octachloronaphthalene 
• 786696-32-0 C₁₇H₁₄N₂O₁₁S₃ 
• 1258000-28-0 C₂₂H₂₃N₇O₉S₃ 
• 1268310-56-0 C₁₉H₁₃Cl₂N₅O₉S₃ 
• 1189037-38-4 C₂₃H₂₃NO₁₄S₃ 

Relevant articles and documents

Novel environment-friendly production process for preparing amine product and H - acid through silane chemical reduction of several nitro compounds

The invention relates to the field of new materials for fine chemicals, and relates to a reduction reaction of a series of nitro compounds, in particular to m-nitroaniline. Several particular important amine compounds such as m-phenylenediamine, 5 - amino o-cresol, 2 - methyl p-phenylenediamine, 1/2 - naphthylamine, H - acid amine and 2, 4, 6 - trimethyl-M-phenylenediamine are prepared from the corresponding mono-or double-nitro compound precursors with a new environmental protection production process technology of and acids derived from the novel process technology. H.

Denitrification and neutralization process of H-acid monosodium salt

The invention provides a denitrification and neutralization process of H-acid monosodium salt. The process comprises the following steps: adding a certain amount of ethylene glycol monomethyl ether and phenol into a mixed solvent of a sodium hydrocarbonate solution, adding the mixture into a compound catalytic system of Ir(CO)Cl(PPh3)2 and RhCl3, introducing CO into a nitrification intermediate reaction kettle, controlling the reaction conditions such as certain pressure, temperature and reaction time, and utilizing a CO/water system to carrying out catalytic reduction on a nitrification intermediate so as to obtain an amino intermediate of H-acid. The denitrification and neutralization process can effectively improve the product yield and quality and can reduce the emission of three wastes.

Synthesis, characterization and RP-HPLC method development and validation for simultaneous determination of Koch acid and H acid

1-amino-8-naphthol-3,6-disulfonic acid (H acid) is an important intermediate used for the synthesizing some dyestuffs and pharmaceuticals. The synthesis of H acid was followed by sulfonation, nitration, reduction and alkali fusion. The total yield was increased to 35% with 99% purity. This study focuses on cheap synthesis of H acid on an industrial scale. The composition and percentage of these compounds were characterized by making reactive dyes and chromatographic analysis, i.e. UV/Visible, IR and HPLC. The RP-HPLC method was developed; in the analysis of Koch acid (1-amino-naphthalene-3,6,8-trisulfonic acid) and H acid. The single HPLC method is useful, both, in the chemical intermediate (Koch acid) and for the final product (H acid).

Device for preparing H-acid

The invention discloses a device for preparing H-acid, comprising a sulfonating device, a nitrating device, a denitration device, an extraction device, a reduction device, a concentration device, a dilution device, a separation and filter device and a drying device. An outlet of the sulfonating device is connected with an inlet of the nitrating device, an outlet of the nitrating device is connected with an inlet of the denitration device, an outlet of the denitration device is connected with an inlet of the extraction device, a first outlet of the extraction device is connected with an inlet of the reduction device, an outlet of the reduction device is connected with an inlet of the concentration device, an outlet of the concentration device is connected with an inlet of the dilution device, an outlet of the dilution device is connected with a first inlet of the separation and filter device, an outlet of the separation and filter device is connected with an inlet of the drying device, and a second outlet of the extraction device is connected with a second inlet of the separation and filter device. The device for preparing H-acid produces H-acid with a continuous production method, has the high production efficiency, saves materials and reduces economic cost.

Process for the preparation of aminoarylsulphonic acids

In the process according to the invention for the preparation of aminoarylsulphonic acids by catalytic hydrogenation of nitroarylsulphonic acids, a substantial increase in the space-time yield in combination with reduced consumption of the catalyst is achieved by dispersing the hydrogen more finely and by limiting according to the invention the concentration of the nitroarylsulphonic acids to be hydrogenated.

Fiber-reactive disazo brown dye having vinylsulfone-type reactive group

A compound, or a salt thereof, represented by the following formula, STR1 wherein A is a substituted or unsubstituted phenylene or naphthylene group, B is STR2 in which R3 is a hydrogen atom or a lower alkyl, lower alkoxy, acylamino or ureido group, and R4 is a hydrogen atom or a lower alkyl or lower alkoxy group, R1 and R3 are independently a hydrogen atom or a substituted or unsubstituted lower alkyl group, X is a substituted or unsubstituted amino, lower alkoxy, substituted phenoxy or sulfo group, Y is --SO2 CH=CH2 or --SO2 CH2 CH2 Z, in which Z is a group capable of being split by the action of an alkali, and m is 2 or 3, which is useful for dyeing hydroxyl group- or amide group-containing fiber materials to give dyed products of a brown color having excellent fastness properties with good build-up property.

Process for the production of aromatic primary amines

Aromatic primary amines, e.g., aniline, are prepared by reduction of an aromatic nitro compound, e.g., nitrobenzene with carbon monoxide and water in the presence of a basic nitrogen containing compound selected from the group consisting of tertiary amine and amide and a rhodium catalyst selected from the group consisting of rhodium oxide, rhodium hydroxide, rhodium carbonyl compound and rhodium salt which forms a rhodium carbonyl compound under reduction conditions.