Sodium stannate

CAS Number

12058-66-1

EC Number

235-030-5

Industries: Plastics & Polymers Textiles, Leather & Paper

What is Sodium stannate?

Sodium stannate (CAS 12058-66-1), also known as disodium tin trioxide, is an inorganic tin salt used industrially as a catalyst precursor, flame retardant additive, and surface treatment agent.

Where is Sodium stannate used?

Textile and leather finishing: mordant and weighting agent that improves dye uptake and fabric density in wool and silk
Polymers and plastics: stabilizer and flame retardant additive contributing to char formation and thermal stability in PVC
Paper: surface sizing and coating for wet strength and stability
Construction coatings and cement chemistry: setting modifier and corrosion-inhibiting additive
It delivers tin chemistry in a water-soluble, alkaline form suited to wet processing.

Commercial specifications

Purity 95% to 99%+ depending on application requirements
Anhydrous form and trihydrate; anhydrous grade preferred for moisture sensitivity

Other Names (Synonyms)

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What are the physical properties of Sodium stannate?

Melting Point 140°C

Density 4.68 g/cm³ @ Temp: 25 °C

Appearance white to light tan crystals with a characteristic odour

Odor Odorless

Form Crystalline

Water Solubility Slightly soluble in water.

How is Sodium stannate classified and handled safely? Learn More

Danger

GHS05· Corrosive GHS07· Irritant

Hazard Statements

H314 Causes severe skin burns and eye damage

H315 Causes skin irritation

H318 Causes serious eye damage

H319 Causes serious eye irritation

H335 May cause respiratory irritation

H412 Harmful to aquatic life with long lasting effects

Precautionary Statements

P260 Do not breathe dust/fume/gas/mist/vapours/spray.

P261 Avoid breathing dust/fume/gas/mist/vapours/spray.

P264 Wash … thoroughly after handling.

P271 Use only outdoors or in a well-ventilated area.

Which trade and regulatory codes apply to Sodium stannate?

WGK (Germany) 3