Index number: C.I. direct yellow 27(13950)
Molecular weight: 662
Molecular formula: C₂₅H₂₀O₉N₄S₃Na₂ 
Structural formula:  

Quality Standard:
Apperance: Dark canary uniform powder. 
Intensity: 100±3 % of the standard. 
Colorful light: Approximate to standard 
Yellow powder,lemon yellow in water,soluble in fibre,difficultly soluble in aclohol,orange in benzene or carbon tetrachloride,not soluble in other organic agents.
Uses:For cotton and hemp glue or dyeness of fibre clothes,or for the dyeness of silk wool terylene and its mixed weave,or for dyeness of leather pulp.
Packing: Net weight 25Kg ,packing in iron bucket.