Zinc Hydroxystannate

We have in store for our clients a wide range of Zinc Hydroxystannate. Zinc Hydroxystannate has excellent flame retardant and smoke suppression properties of ZHS. Further, this can be used in Flame Retardant Low Smoke (FRLS) & Halogen-Free Flame Retardant (HFFR).

Zinc Hydroxystannate is also known as ZHS.

Specification Of Zinc Hydroxystannate (ZHS) :
Chemical formula ZnSn(OH6)
Appearance White powder
Analysis Sn - 41%
Zn - 23%
CI - < 0.1%
Free H2O - < 1%
Specific gravity 3.3
Bulk density (g/cm3) Tamped - 0.6
Untamped - 0.5
Median particle size (g/cm3) (µM) 2.3
Aqueous solubility (@ 20°C) <0.01%
Refractive index (@20°C) 1.9
Decomposition temperature (°C) > 180

Applications :
  • Zinc Hydroxystannate (ZHS) can replace Molybdenum Trioxide in PVC FRLS cable compound
  • ZHS was developed initially for use on halogen containing polymer formulation, especially flexible PVC for wires and cables
  • Zinc Hydroxystannate (ZHS) can provide Oxygen Index as well as Smoke Suppressant properties
  • By adding Antimony Trioxide you get oxygen index but smoke increases, while by adding ZHS you get oxygen index as well as smoke suppressant properties


The excellent flame retardant and smoke suppression properties of ZHS have been demonstrated for the following materials:-

  • PVC ( Rigid and Flexible), FRLS CABLE compound
  • Polyester Resins
  • Alkyd Resin-Based Paints
  • Polychloroprene ( Neoprene)
  • Chlorosulphoned Polyethylene ( Hypalon )
  • Polyamide ( Nylon 6 and Nylon 66 )
  • Epoxy Resins and Ethylene-Vinyl Acetate Co-Polymer
  • EVA, HFFR cable compound

Zinc Stannate

We have in store for our clients a wide range of Zinc Stannate (ZnSnO3). Manufactured in our state-of-the-art- manufacturing unit, these are quality tested on well-defined parameters before supplying it to our clients. Below mentioned are some of the packaging specifications:

Specification Technical Data Sheet :
Mol. Wt. 232.15
CAS No. 12036-37-1
Description White Powder
Tin 53.00 To 56.00%
Zinc 26.0 To 27.5%
Chloride 800 ppm Max.
Moisture 0.5%
Volatitelossat 105°C 1.00% Max.
Sieve Analysis (200 Mesh) 0.1% Max.
Conductivity US 800 Max.
Decompositation Temperature >570°C