Specifications

White power, Opposite density is 1.86, will damp in wet area. It can melt in water, can not melt in Ethyl alcohol.

1,Formula Na₂H₂P₂O₇

2,Formula wt 221.94

3,CAS: [7758-16-9]

4,Specificity: White power, Opposite density is 1.86, will damp in wet area. It can melt in water, can not melt in Ethyl alcohol. Aqueous is cidity, the pH number is 3.7—5.0. It can be synthesize with Fe2+,Mg2+, There are some Aluminum salt and Calcium salt in order to control the respond the velocity when it uses for swelling agent.

5,Packing: 25kg net paper bag or 1mt big bag with PE liner.

Name of index	FCC-V	E450(i)
Description	White powder or grains
Assay	93-100.5%		≥95%
pH of a 1 % solution	--	3.7-5.0
P2O5 Content(ignited basis) ,%	--	63.0-64.5
Lead, ≤%	0.0002	0.0004
Water insoluble ,≤%	1	1
Fluoride, ≤%	0.005	0.001
Loss on drying ≤%	--	0.5(105°C,4h)
As,≤%	0.0003	0.0003
Cadmium ≤%	--	0.0001
Mercury ≤%	--	0.0001