Gamma Acid - gg

"Gamma Acid
Chemical Name: 2-Amino-8-Naphthol-6-Sulfonic Acid
Other names: γ-acid; gamma acid
Appearance: Light grey powder
Molecular formula: C10H9NO4S
M.W.: 239.25
CAS NO: 90-51-7
Specification:
Purity(coupling value): ≥ 90%
Moisture: ≤ 5%
Ash content: ≤ 3.0%"