1.Chemical name:Disodium Dihydrogen Pyrophosphate, Sodium Acid Pyrophosphate
2.M. F.: Na2H2P2O7
3.M. W. : **1.*4
4.Physical properties: Monoclinic, white crystalline powder. Density 1.*6. Practically insoluble in alcohol, soluble in water. Hydrolyzes to orthophosphate on heating in acid medium. Hygroscopic, forms hexahydrate in damp air. Decomposes to metaphosphate at above **0
5.Quality standard: (FCCV, GB*********0)
 

Name of index	FCC-V	GB*********0
Content (as counted by Na2H2P2O7) ≥ %	*3.****0.5	*3.****0.5
Water Insoluble% ≤%	1.0	1.0
PH (1% aqueous solution)	-	3.**4.5
Arsenic(As),ppm, ≤	3	3
Heavy Metals (as Pb),ppm, ≤	*0	*0
Fluoride(F),ppm, ≤	*0	*0
Pb  ppm, ≤	2	2

 
6.Usage: In food industry, it is used as rapid ferment agent, quality improver and applied as acid component of bread and cakes synthetic leavening agent. Mixed with other phosphates can be applied to water retention of meat product, such as canned meat, cooked ham, meat can and instant noodles.
7.Packing: *5kg composite plastic woven/paper bag with PE liner.
8.Storage and transport: It should be stored in a dry and ventilative warehouse and kept away from moisture and poisonous substances. Handled with care, so as to avoid damage to packing bags.