CAS No. 121-57-3

Appearance	white crystal
content %	≥ 99.0
Aniline %	≤ 0.02
Water insoluble %	≤ 0.1
Moisture%	≤ 0.5

Molecular Formula: C6H7NO3S
Molecular Weight: 173.19
Hazard Symbols: C,Xi
UN Number: UN 2790 8/PG 3
WGKGermany: 1
HS Code: 29214210

EINECS:204-482-5
Molecular formula:C6H7NO3S

Appearance	White crystalline powder
Assay	99.00% Max.
Aniline content	0.02% Max
Water insoluble	0.10% Ma
Water content	0.50% Max.

Melting point:> 300 ° C (lit.)
Density :1.485
Storage condition:Store in dark!
Water solubility: 0.1 g / 100 mL (20 ºC)
Merck :14, 8926
BRN :908765
Stability: Stable. Incompatible with strong oxidizing agents.
Assay:99.5%
Cl:0.001%

Chemical properties: white or off-white crystal. The hydrate loses moisture at 100 ° C, and the anhydrides begin to decompose and carbonize at 280 ° C. The relative density of 1.485 (25/4). Slightly soluble in cold water, insoluble in ethanol, ether and benzene, a significant acid, soluble in caustic soda solution and sodium carbonate solution.

Upstream raw materials: aniline, sulfuric acid
Downstream products: acid yellow 2G, acid orange Ⅱ, alkaline yellow O, p-amino acid, anhydrous, methyl orange