[Standard]: Q/LZK003-2002

[Molecular formula]: C₅H₆O₄

[Molecular weight]: 130

[Properties]:

Item	Value	Test method
	Premium grade
appearance	white powder or crystal	eyeballing
purity	99	neutralization
MP	165-169	GB5962-81
Chroma	10	absorption spectrum
Fe %	0.001	colorimetric analysis
heavy metal %	0.003	turbidimetric method
loss on dry %	0.3	GB6613-80
residue on ignition %	0.1	GB6614-80
chloride assay	0.0015	colorimetry
sulfate %	0.02	colorimetry

[Properties]: White powder or crystal.

[Uses]: Used as additive of resin, synthetic fiber, plastic, coating, rubber and monomer material.

[Packing & storage]: 50kg in paper bag, avoid moisture.