Appearance : beige powder
M.W.: 380

Solution method of AS-G
Naphthol AS-G   10
Nekal BX        2
Hot water        X
NaOH(36°Be)   5.19ml/L (total amount :10.19ml/L)
(The free alkalie is 2g/L ,which amounts to 36°Be NaOH of 5ml/L )

Operation :
Nekal BＸ is adde into Naphthol AS-G , after wetting, NaOH is added into AS-G and they are stirred into the paste .
Then some hot water is added into the paste for complete solution before use.
Grounding with AS-G – drying – developing with Colour fast base or salt – soaping – drying

Coupling constant between AS-G and the following colour fast base ( weight ratio : AS-G is 1 )