TOBIAS ACID

2-Amino-naphthalene sulfonic acid 

Usage: an important dye intermediate for the manufacture of J acid and y-acid, Naphthol AS-SW, Reactive Red K1613 and other dyes, and organic pigment purple and so on.

Quality Standard: HG/T2548-2006

Item		Indicator
		Superior Grade	First Grade	Qualified Grade
Appearance		White to light red powder
Total Amino Value (in Tobias acid dry) (mass fraction)	% ≥	98.5	98.5	97.5
2 - Naphthylamine (mass fraction)	% ≤	0.01	0.10	0.25
Moisture (mass fraction)	% ≤	1.0	1.0	2.0

 

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