Usage:Used for water treatment to boiler, also as buffering agent to acidity, detergent, cleaning agent, dyeing flux, for tanning and electroplating. For food additive it is mainly used as buffering agent, emulsification agent, nourishment, etc.

Standard:

Item	Unit	Specification
		Anhydrous		Hydrate
		Tech grade	Food grade	Tech grade	Food grade
Main content：	%	98 min	98 min	98 min	98 min
Phosphorous pentoxide as P2O5:	%	58.0 min	58.0 min	44.6 min	44.6 min
Ph of 1% water solution:	-	4.2-4.8	4.2-4.8	4.2-4.8	4.2-4.8
Heavy metal as Pb:	%	--	0.001 max	--	0.001 max
Arsenic as As:	%	--	0.0003 max	--	0.0003 max
Fluoride as F:	%	--	0.005 max	--	0.005 max
Water insoluble:	%	0.05 max	0.05 max	0.05 max	0.05 max