117-55-5

Usage

Safety Profile

When heated to decomposition itemits toxic fumes of SOx and NOx.

InChI:InChI=1/C10H9NO6S2/c11-7-4-5-8(18(12,13)14)6-2-1-3-9(10(6)7)19(15,16)17/h1-5H,11H2,(H,12,13,14)(H,15,16,17)

Upstream product

• 7664-93-9 sulfuric acid 
• 82-75-7 8-anilino-1-naphthalenesulfonate 
• 91-20-3 naphthalene 
• 100362-96-7 8-acetylamino-naphthalene-1-sulfonic acid 

Downstream Products

• 83-65-8 4,5-dihydroxy-1-naphthalene-sulfonic acid 
• 117-56-6 1-naphthol-4,8-disulfonic acid 
• 83-64-7 8-amino-1-naphthol-5-sulfonic acid 
• 84-86-6 4-amino-1-naphthalenesufonic acid 
• 81-04-9 naphthalene-1,5-disulfonate 
• 82-65-5 1,1-dioxo-2H-1λ⁶-naphth[1,8-cd]isothiazole-3,5-disulfonic acid 
• 60913-37-3 naphthalene-1,4,5-trisulfonic acid 

Relevant academic research and scientific papers

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 isolation of 1-naphthylamine-4,8-disulphonic acid

Process for the isolation of 1-naphthylamine-4,8-disulphonic acid from sulphonation mixtures containing it according to which process the sulphonation mixture is introduced into preheated water in such a manner that, at the start of crystallization, a temperature of at least 100° C. is reached and the 1-naphthylamine-4,8-disulphonic acid is separated from the mother liquor at a temperature not higher than 70° C. The process is applied particularly advantageously for the isolation of 1-naphthylamine-4,8-disulphonic acid from sulphonation mixtures which have been obtained by introducing in turns alkali metal sulphate, 1-naphthylamine-8-sulphonic acid and SO3 into sulphuric acid which has been introduced initially, a total of 1.5 to 3 mols of SO3 and 0.6 to 1.5 mols of alkali metal sulphate being employed per mol of 1-naphthylamine-8-sulphonic acid.