Tricalcium Phosphate (Flame Retardant Grade)

Name: Tricalcium Phosphate (Flame Retardant Grade)
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 7758-87-4

Tricalcium phosphate flame retardant grade is an inorganic mineral filler that functions as a halogen-free, phosphorus-based flame retardant and smoke suppressant in polymer applications. It acts in the condensed phase by catalyzing char formation and releasing phosphate species that cross-link the char layer, improving its integrity and heat shielding efficiency. When combined with intumescent systems or metal hydroxides, it provides synergistic smoke suppression and enhanced flame retardancy.

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Technical Specifications

appearance	White fine powder
purity (%)	≥96
moisture (%)	≤1.0
calcium content (%)	38.8
phosphorus content (%)	19.9
particle size (D50, µm)	5–20

Applications

PVC and EVA cable insulation as smoke suppressant and FR synergist
Polyolefin compounds with mineral FR systems for halogen-free applications
Intumescent coating formulations as inorganic phosphorus source and char stabilizer
Ceramic and glass fiber composites with improved fire resistance
Rigid PVC building profiles and foam boards with reduced flammability

Key Features

Inorganic mineral origin ensures excellent thermal stability above 500°C for demanding fire scenarios
Dual phosphorus and calcium ions synergistically catalyze condensed-phase char formation and stabilization
Halogen-free and low-toxicity profile makes it suitable for food-contact adjacent and medical applications
Cost-effective white filler that simultaneously contributes to opacity and flame retardancy in filled polymers