4-Hydroxy-7-methylamino-2-naphthalenesulfonic acid Chemical Properties

Density 

1.542

refractive index 

1.4790 (estimate)

storage temp. 

2-8°C

form 

crystalline powder

pka

-0.14±0.40(Predicted)

color 

Very dark brown

CAS DataBase Reference

22346-43-6(CAS DataBase Reference)

EPA Substance Registry System

2-Naphthalenesulfonic acid, 4-hydroxy-7-(methylamino)- (22346-43-6)

Safety Information

HS Code 

2930909899

4-Hydroxy-7-methylamino-2-naphthalenesulfonic acid Usage And Synthesis

Chemical Properties

4-Hydroxy-7-methylaminonaphthalene-2- sulfonic acid [22346-43-6], N-methyl J acid, is produced by reaction of 2,5-dihydroxynaphthalene-7-sulfonic acid with methylamine and aqueous sodium bisulfite at 96 C for 36 h (yield 83 %). It is used to produce C.I. Reactive Orange 4, C.I. Reactive Orange 13, and C.I. Reactive Red 33.

4-Hydroxy-7-methylamino-2-naphthalenesulfonic acid(22346-43-6)Related Product Information

• Sulfanilic acid
• Nickel bis(sulphamidate)
• 4-(Trifluoromethyl)cinnamic acid
• Ethyl 4-methylcinnamate
• 1,3-Dimethylbarbituric acid
• 4-Amino-benzenesulfonic acid monosodium salt
• Naphthalene-2-sulfonic acid
• Taurine
• Diethyl methylmalonate
• Molasses
• Sulfamic acid
• 3,3-Dimethyl-2-oxobutyric acid
• CHLOROPHOSPHONAZO III
• 2-Methylpropanedioic acid
• CHLORANTINE FAST RED 5B
• Disodium 7,7'-(carbonyldiimino)bis(4-hydroxynaphthalene-2-sulphonate)
• 5,5'-Dihydroxy-2,2'-dinaphthylamine-7,7'-disulphonic acid
• DIRECT RED 80