Polyhedral Oligomeric Silsesquioxane (POSS)


POSS flame retardant is a silsesquioxane with excellent heat resistance, hydrolysis and weather resistance. Recommended for use in PC and PC alloys, dosage 0.08-0.3%.



  • Chemical and thermal properties are very stable, can withstand high temperatures above 400 °C
  • very low dosage
  • environmentally friendly, no bromine, chlorine, phosphorus
  • can be used for ultra-thin products of 1.6mm or less.

Typical Properties

Density 1.26-1.38g/cm3
PH value 6.4-6.8
Softening point 95°C
composition 99.9% Effective
5% thermal decomposition temperature ≥450°C

These properties are typical but do not constitute a specification either in part or as a whole. Specification data is available on request from sales, customer service or customer technical service.


Transportation classification: No regulated for transportation.

Packing: 25kg/bag; 1mt/pallet; 20mt/20’FCL.


TDS / MSDS Download

POSS Polyhedral Oligomeric Silsesquioxane tds baoxu chemical

Baoxu Chemical Flame Retardant Brochure