浙江中致贸易有限公司
Zhejiang Zhongzhi Trade Co., Ltd.

Chinese name: H-acid
Alias: - Amino-8-naphthol-3,6-disulfonic acid
English name: 4-Amino-5-hydroxy-2,7-naphtholenedisulfonic acid
CAS RN： 90-20-0
EINECS number: 201-975-7
Molecular formula: C₁₀H₉NO₇S₂
Molecular weight: 319.31
Appearance and Characteristics: The pure product is a colorless crystal, slightly soluble in cold water, and soluble in alkaline solutions such as soda ash and caustic soda. It appears brownish red when interacting with ferric chloride solution. Acid salts have a slightly blue red fluorescence, which turns red purple when alkaline is added.
Product Usage: Mainly used for the production of acidic, direct, and reactive dyes, such as Acid fuchsin 6B, Acid Dahong G, Acid Black 10B, Direct Black, Reactive Brilliant Red K-2BP, Reactive Purple K-3R, Reactive Dissolved Blue K-R, and more than 90 other types. These dyes are used for dyeing wool and cotton fabrics. It can also be used for the production of drugs.