Product name: Meta Base Ester
Chemical name: 2-[(3-aminophenyl)sulphonyl] hydrogensulphate
Synonys: Meta Base VS
Use: It is mainly used as intermediate of dyes.
Package: 25kg plastic woven bag
Specifications of Meta Base Ester:
|Appearance||Grey solid||Grey solid|
Introductions of Meta Base Ester:
Meta Base Ester is an important intermediate of dyestuff. It can be used to make azo dyestuff, such as direct green lotus R, direct sun resistant ash 2BL, direct acid resistant violet, direct peach red, direct copper dye navy blue, sun resistant blue B2R, reactive scarlet, brilliant orange, grass green and red brown, and scarlet acid and phenyl j acid.
Meta Base Ester used to be prepared from β – naphthylamine. Due to the strong carcinogenicity of β – naphthylamine, this production method has been eliminated. Now, 2-naphthylamine-1-sulfonic acid (Tobias acid) is used as raw material to prepare J-acid. After sulfonation and hydrolysis, 2-naphthenic-5,7-disulfonated monosodium salt (amino J acid) was obtained, and then neutralized, alkali melted and acidified.