Salicylic acid
Physical and Chemical properties:  
Crystal powder in pale pink to pale brown,odorless,sweet first and then hot,no chemical change in the air.Atmospherically sublimation temperature over 76oC.Easily to decarboxylate and change into phenol and carbon dioxide when heated atmospherically,and its aqueous solution appears acid reaction,becomes purple with FeCl3.Slightly dissolves in water but dissolves in boiling water easily.Soluble in ethanol or ether and slightly soluble in chloroform.
Specification:
Item    Standard    
Appearance    White or colorless, acicular crystals or a white, crystalline powder    
Salicylic acid    99.0%-100.5% min    
Melting point    158-161°Cmin    
Clarity and color of solution    Clear and colorless    
Heavy Mntals    20ppm    
Chloride    100ppm    
Loss on drying    0.5% max    
Sulfate Ash    0.1%max    
Sulfate       200ppm    

Packing:  
Packing in polypropylene knitted bag attached with paper polyethylene plastic bag inside.
Net weight 25kg.
Storage:  Must be in dry and ventilated place.