Sodium&Nbsp; Tripolyphosphate (STPP)

• Customization: Available
• CAS No.: 7758-29-4
• Usage: Water Treatment Chemicals, Paper Chemicals
• Model NO.: STPP
• Color: White
• Molecular Formula: Na5p3o10
• CAS Number: 7758-29-4
• Molecular Weight: 367.86
• pH Value: 9.2-10.3
• Whiteness: 85 Min
• Transport Package: 25kg/Paper Bag or 1000kg/Supersack
• Specification: STPP
• Trademark: Deborn
• Origin: China
• HS Code: 2835311000

Product Description

Synonym: Pent-sodium Phosphate
Molecular formula: Na₅P₃O₁₀
Molecular Weight: 367.86
CAS Number: 7758-29-4 
Technical index:

Testing Items	STPP Food Grade	STPP Technical Grade
Appearance	White Powder or granules	White Powder or granules
Content (Na5P3O10)%	95.0 min	94.0 min
P2O5 %	57.0 min	56.5 min
Fluoride (F) %	0.003 max	-
Arsenic (As)%	0.0003 max	-
Heavy Metal (Pb)%	0.001 max	-
Chloride (Cl)%	0.025 max	-
Sulfate (SO42-) %	0.4 max	-
Water Insoluble %	0.05 max	0.1 max
pH Value	9.5-10	9.2-10.3
Whiteness	85 min	85 min

Application:
It can be used as moisture conservative. Applied to can, fruit drinks, milk products, vegetable protein drinks, instant noodles, meat products, and so on.
Package:
25kg/paper bag or 1000kg/supersack.

STPP is a critical additive in detergents and cleaning products, where it serves multiple functions:

Chelation of Metal Ions: STPP binds calcium (Ca²+) and magnesium (Mg²+) ions in hard water, preventing them from forming insoluble salts with surfactants. This enhances detergent efficiency, reduces residue on fabrics, and maintains fabric brightness

Emulsification and Dispersion: It breaks down proteins and fats in stains, emulsifies oils, and disperses solid particles (e.g., dirt, sand), improving overall cleaning performance
pH Buffering: STPP stabilizes the pH of detergent solutions at ~9.4, optimizing the removal of acidic stains
Anti-Caking Agent: In powdered detergents, STPP prevents clumping by absorbing moisture and maintaining a dry, free-flowing texture