What is Sodium Stannate Trihydrate CAS 12209-98-2?

Sodium stannate trihydrate is an inorganic tin salt containing sodium, tin, oxygen, and water of crystallization. CAS 12209-98-2 identifies this hydrated material, which is commonly written as Na2SnO3.3H2O or Na2Sn(OH)6, with a formula weight of about 266.73.

Why is Sodium Stannate Trihydrate used in alkaline tin electroplating?

It is a tin source that forms soluble stannate complexes in alkaline plating baths, especially when used with sodium hydroxide. This allows tin to be deposited from alkaline solution and supports more uniform tin or tin-alloy plating in the bath.

What other applications does this product have?

It is used as a stabilizer in hydrogen peroxide solutions, as an intermediate for downstream tin chemicals, and in glass, ceramic, textile mordanting, and fire-retardant fabric applications. It is also used in tin-alloy electroplating systems and water-based stannate process formulations.

What are the typical physical properties?

Sodium stannate trihydrate is normally a white crystalline solid or powder that is soluble in water and forms an alkaline aqueous solution. It is generally insoluble in alcohol and acetone and loses its water of hydration at elevated temperature.

How should Sodium Stannate Trihydrate be stored and handled?

Keep it in tightly closed, moisture-resistant containers in a cool, dry, well-ventilated area. Avoid humid conditions and incompatible acidic or oxidizing materials, and use suitable PPE when handling the solid to prevent dust exposure and skin or eye contact.

Sodium Stannate Trihydrate CAS 12209-98-2

Sodium Stannate Trihydrate (CAS 12209-98-2) is an inorganic stannate compound supplied as a hydrated alkali salt, primarily used as a functional tin source in industrial chemical systems. It is commonly applied in alkaline electroplating and metal surface treatment processes where stable tin species are required under controlled conditions.

In addition, it is used in selected inorganic synthesis processes and in glass or ceramic-related formulations involving tin chemistry. The product is supplied as a solid crystalline material suitable for industrial formulation and processing use, with standard export packaging and documentation support including COA, SDS, and TDS.

CAS: 12209-98-2
Synonyms: Sodium Stannate Trihydrate; Disodium Trioxostannate Trihydrate; Disodium Stannate Trihydrate
Einecs: 235-030-5
Molecular Formula: Na2SnO3.3H2O
Grade: Industrial grade
Package: Available in standard export packaging suitable for solid inorganic chemicals. Packaging can be arranged according to order quantity and logistics requirements.

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Product Description

1 Physicochemical Properties

2 Typical Applications

3 Packaging

4 Storage

Physicochemical Properties

Property	Description
Appearance	White crystalline solid
Odor	Odorless
Molecular Formula	Na₂SnO₃·3H₂O
Solubility	Soluble in water
pH (aqueous solution)	Alkaline
Melting Point	Decomposes before melting (typical for hydrated salts)
Flash Point	Not applicable (inorganic salt)
Supply Form	Solid crystalline / hydrated powder

Typical Applications

Alkaline electroplating systems as a tin source in surface treatment processes
Intermediate in inorganic chemical synthesis involving tin compounds
Glass and ceramic formulations requiring controlled tin chemistry
Industrial process systems using water-based stannate formulations
Raw material for production of downstream tin-based chemicals

For related tin salt pages used in plating, catalyst or specialty chemical systems, review Stannous Chloride Dihydrate, Tin(II) Oxalate, and Stannous Oxalate.

Packaging

Sodium Stannate Trihydrate is supplied as a solid crystalline material in sealed, moisture-protected packaging suitable for industrial handling and export shipment. Typical packaging forms include lined bags or sealed containers designed to prevent moisture uptake and contamination during storage and transport.

Packaging configuration can be arranged based on order volume and logistics requirements to ensure stable delivery and handling efficiency.

Storage

Store in a cool, dry, and well-ventilated environment. Keep containers tightly sealed to prevent moisture absorption. Avoid exposure to humid conditions and incompatible materials. Maintain packaging integrity during storage and transportation.

FAQ - Technical & Supply Chain

Q:
What is Sodium Stannate Trihydrate CAS 12209-98-2?

A: Sodium stannate trihydrate is an inorganic tin salt containing sodium, tin, oxygen, and water of crystallization. CAS 12209-98-2 identifies this hydrated material, which is commonly written as Na2SnO3.3H2O or Na2Sn(OH)6, with a formula weight of about 266.73.
Q:
Why is Sodium Stannate Trihydrate used in alkaline tin electroplating?

A: It is a tin source that forms soluble stannate complexes in alkaline plating baths, especially when used with sodium hydroxide. This allows tin to be deposited from alkaline solution and supports more uniform tin or tin-alloy plating in the bath.
Q:
What other applications does this product have?

A: It is used as a stabilizer in hydrogen peroxide solutions, as an intermediate for downstream tin chemicals, and in glass, ceramic, textile mordanting, and fire-retardant fabric applications. It is also used in tin-alloy electroplating systems and water-based stannate process formulations.
Q:
What are the typical physical properties?

A: Sodium stannate trihydrate is normally a white crystalline solid or powder that is soluble in water and forms an alkaline aqueous solution. It is generally insoluble in alcohol and acetone and loses its water of hydration at elevated temperature.
Q:
How should Sodium Stannate Trihydrate be stored and handled?

A: Keep it in tightly closed, moisture-resistant containers in a cool, dry, well-ventilated area. Avoid humid conditions and incompatible acidic or oxidizing materials, and use suitable PPE when handling the solid to prevent dust exposure and skin or eye contact.

Ordering & Documentation

Key information for document requests, quotations, and supply planning.

Documents

COA, TDS, SDS/MSDS and packing details are available on request.

Quotation

Send the CAS number, grade, quantity, packing preference and destination.

Sample & Supply

Support is available for samples, trial orders, bulk and repeat supply.

Storage & Shipping

Product-specific conditions are confirmed before order.

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