Zinc Stannate (ZnSnO3) Smoke Suppressant

Name: Zinc Stannate (ZnSnO3) Smoke Suppressant
Brand: Chemzip
Price: 1 USD
Availability: InStock

CAS Number: 12036-37-2

Zinc stannate (ZnSnO3) is an inorganic smoke suppressant and char promoter used primarily in flexible and rigid PVC, rubber, and halogen-containing polymer systems. It suppresses smoke generation by catalyzing dehydrochlorination and cross-linking reactions that reduce volatile hydrocarbon emissions. Zinc stannate can partially replace antimony trioxide as a halogen synergist while simultaneously providing significant smoke reduction, making it valuable in applications requiring low smoke toxicity ratings such as mass transit vehicles and building wiring.

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Technical Specifications

appearance	White powder
moisture (%)	<0.5
ZnO content (%)	32–34
SnO2 content (%)	64–66
particle size D50 (µm)	1–5
decomposition temperature (°C)	>400

Applications

PVC cable insulation and jacketing with low-smoke and low-toxicity requirements
Flexible PVC flooring and wall panels for mass transit and marine applications
Halogenated rubber compounds for cable sheaths and conveyor belts
PVC rigid profiles and fittings for fire-rated building applications
Chlorinated polyethylene (CPE) and PVDC barrier film compounds

Key Features

Dual action as halogen synergist and smoke suppressant in a single additive reduces formulation complexity
Effective reduction of CO and total smoke density in PVC combustion, meeting BS 6853 and EN 50268 limits
High thermal stability (>400 °C) prevents premature decomposition during PVC compound processing
Compatible with ATH and MDH for use in halogen-free systems requiring additional smoke control