Product Name:	Sodium Tripoly Phosphate (STPP)
WCode:	19-053
CAS No.	7758-29-4
Molecular Formula:	Na5P3O10
Formula Weight:	367.86

Physical and Chemical Properties
Physical State			White powder
Melting Point			620 °C
Specific Gravity			> 1.5
Solubility in Water			20% at 25 C
PH			9.7-9.8
Stability			Stable under ordinary conditions
Applications
The alkaline phosphates offer detergency activity in combination with the properties of sequestration, dispersion and buffering ability. STPP is used in water softening, industrial cleaners, food uses, detergent, emulsifier of oil and grease, peptizing agent, deflocculating agent in oil well, sequester in cotton boiling.
Sales Specification
Food Grade Kosher
Appearance					White powder up to standard with FCC
Assay (Na5P3O10)					95.00% Min
P2O5					57.0% Min
Fe:					0.01% Max
PH (in1% water solution):					9.5-10.0
Chloride (as Cl)):					0.0001%
Heavy metal:					0.001% Max.
Pb:					0.0001% Max
Arsenic (as Cl):					0.0001% Max.
Fluoride (as F):					0.003% Max.
Water insoluble:					0.05% Max.
Technical Grade
Appearance				White granular or powder
Assay (Na5P3O10)				95.00% Min
P2O5 Content				57% Min
F				0.003% Max
As				0.0003% Max
Heavy metal (As Pb)				0.001% Max
Cl				0.025% Max
SO4				0.4% Max
Insoluble				0.05% Max
PH				9.5-10.00
Packing:
In 25 KG plastic woven bags
Screen Analysis, % thru USSS						Specifications
Powder:		40 mesh (420 um)				99 Min
		100 mesh (150 um)				90 Min
Granulars:
Light Density		12 mesh (1.70 um)				100 Min
		20 mesh (850 um)				90 Min
		100 mesh				10 Max
Dense Density		18 mesh (1.18 um)				100 Min
		20 mesh (850 um)				95 Min
		100 mesh				5 Max
Bulk Density, lb/ft3(kg/m3)						Typical Value
	Powder					53 (850)
	L/D Granular					32 (510)
	Dense Granular					63 (1010)