Item	Details
Chemical Name:	Sodium Tripolyphosphate (STPP)
Synonyms:	Pentasodium Triphosphate, Sodium Triphosphate, Tripolyphosphate, STP
CAS No.:	7758-29-4
EINECS/EC No.:	231-838-7
HS Code:	28352910
Molecular Formula:	Na₅P₃O₁₀
Molecular Weight:	367.86 g/mol
Grade:	Detergent Grade (Industrial Grade)
Appearance:	White, free-flowing powder or granules

Parameter	Standard Value
Main Content (Na₅P₃O₁₀):	94.0% min
P₂O₅:	56.5% min
pH (10g/L solution):	9.2-10.0
Whiteness:	90% min
Water Insoluble:	0.1% max
Fe:	0.01% max
Pb:	0.001% max
Particle Size:	90% min through 35 mesh
Bulk Density:	0.5-0.9 g/cm³ (adjustable)

Applications

1. Detergent Industry: Primary builder in laundry powders, liquid detergents, and soaps
   • Water softening: Sequesters Ca²⁺ and Mg²⁺ ions
   • Soil suspension: Prevents redeposition of dirt on fabrics
   • Emulsification: Enhances removal of oil and grease
   • pH buffering: Maintains optimal cleaning conditions