1-Diazonio-4-sulfonaphthalen-2-olate

Appearance:

Yellow acicular crystal or paste, slightly soluble in water, soluble in alkali. Its sodium salt melting point 168 ℃, flammable

Content ≥ 75%

Main content (HPLC) ≥ 95%

Insoluble matter ≤ 0.1%

Free acid (based on H2SO4) ≤ 2%

Iron ion mg / kg ≤ 30

Application:

dye intermediate for the synthesis of acid mordant dyes, azo dyes, dichromatic dyes and nitrodiazoxide.