Usage: it can be widely used in medicine,herbicide,chemicals and dyes. Formula: 1,4-C6H4O2 Molecular weight: 108.1 Specification: Appearance: yellow or black green crystalline powder Content: 99 pct Min Melting point: 112DC-116DC Loss on dry: 0.5 pct Max Residue after ignition: 0.05 pct Max. Packages: in 35kgs(N.W.) and 40kgs(N.W.)cardboard drum lined with double plastic bags for more details, pls view http://chemicals.wycn.net email:wywcc@163.com