Package: It is packed with polypropylene woven bag or paperbag.The net weight is 500kg,25kg or according to customers' demanda

Product description:

Usage:It can be used in the production of Dacron polyester; used as intermediate and modifier for pharmaceutical, pesticide and polyester.

Physicochemical properties:This product is white crystal powder. It is soluble in water.

Molecular formula:C8H5O7SNa Molecular weight:268.24 Melting point:300℃

Structural formula:

Quality index

Item	Standard requirement
	Premium grade	First grade product	Qualified proudct
20% water solution	No suspended matter, no sediment clear liquid	—	—
Chromaticity,(20% water solution,platinum—cobalt )number ≦	20	20	20
40%EGChromaticity,(platinum—cobalt )number ≦	50	60	100
Absorbance ≦	0.40	—	—
Acid value,mgKOH/g	415~421	415~421	415~421
Content,% ≧	99.0	99.0	99.0
Sulfate(Counted by SO4)Content,mg/kg ≦	500	500	500
Ferrum(Fe)Content,mg/kg ≦	5	8	10
Chloride(Counted by C1)Content,mg/kg ≦	10	15	20
Moisture,% ≦	0.50	0.50	1.0
PH value	1.8~2.2	—	—

S & T:It should be stored in dry and ventilated place, and avoid moisture, sunlight and fire; Avoid to place together with other chemical products.

Packing:It is packed with polypropylene woven bag or paper bag. The net weight is 500kg, 25kg or according to customers’ demands.