Sodium Stannate, Sodium Tin Oxide, Sodium Hexa Hydroxo Stannate, 12058-66-1

SODIUM STANNATE (Na₂Sn(OH)₆)

PRODUCT IDENTIFICATION INFORMATION

CHEMICAL STRUCTURE

    Sodium Stannate (Na₂Sn(OH)₆)
    
          OH
           \
    HO — Sn — OH
           / \
          OH  OH
           \
            ONa

    Sodium Hexahydroxostannate(IV)
    Octahedral Structure

Molecular Formula: Na₂Sn(OH)₆ (Na₂SnO₃·3H₂O)
SMILES: [Na+].[Na+].OSn-2(O)(O)(O)O
InChI: InChI=1S/2Na.6H2O.Sn/h;;6*1H2;/q2*+1;;;;;;;+2/p-4
Structure: Octahedral complex with Sn(IV) surrounded by six hydroxide groups

SECTION 1: CHEMICAL IDENTITY AND DEFINITION

SECTION 2: PHYSICAL AND CHEMICAL PROPERTIES

SECTION 3: CHEMICAL PROPERTIES AND REACTIVITY

SECTION 4: COMPARISON OF TIN COMPOUNDS

SECTION 5: PRODUCTION METHODS

Method 1: Dissolution of Tin Metal in Sodium Hydroxide (with Oxidizing Agent)

• Reaction: Sn + 2NaOH + 2H₂O + [O] → Na₂Sn(OH)₆

• Description: Metallic tin is dissolved in concentrated sodium hydroxide solution in the presence of an oxidizing agent (e.g., hydrogen peroxide, sodium nitrate, or oxygen); Sodium stannate is formed; The solution is evaporated and crystallized to obtain the product

Method 2: Reaction of Tin(IV) Oxide with Sodium Hydroxide

• Reaction: SnO₂ + 2NaOH + 2H₂O → Na₂Sn(OH)₆

• Description: Tin(IV) oxide is dissolved in concentrated sodium hydroxide solution under heating; Sodium stannate is formed; Evaporation and crystallization yield the product

Method 3: Precipitation from Tin Salts

• Process: Tin salt + Sodium hydroxide → Sodium stannate

• Description: Tin(IV) salts are reacted with excess sodium hydroxide; Sodium stannate is formed in solution; Purification and crystallization yield the product

Method 4: Hydrothermal Synthesis

• Process: SnO₂ + NaOH (conc.) → Na₂Sn(OH)₆ (under hydrothermal conditions)

• Description: Tin oxide is reacted with concentrated sodium hydroxide under high temperature and pressure; High-purity sodium stannate is obtained

SECTION 6: FUNCTIONAL PROPERTIES AND MECHANISM OF ACTION

SECTION 7: MAIN APPLICATION AREAS

SECTION 8: QUALITY SPECIFICATIONS (TECHNICAL GRADE)

SECTION 9: TOXICOLOGICAL PROFILE

SECTION 10: GHS CLASSIFICATION AND LABELING

GHS Classification (Compliant with CLP and UN GHS):

Signal Word: WARNING

Hazard Pictograms: GHS07 (Exclamation Mark)

Hazard Statements (H-Codes):

NFPA 704 Hazard Classification:

SECTION 11: PRECAUTIONARY STATEMENTS (P-CODES)

SECTION 12: FIRST AID MEASURES

SECTION 13: FIREFIGHTING MEASURES

SECTION 14: STORAGE AND SHELF LIFE

SECTION 15: PACKAGING OPTIONS

SECTION 16: TRANSPORT INFORMATION

SECTION 17: REGULATORY STATUS

SECTION 18: OTHER NAMES AND SYNONYMS

SECTION 19: SUMMARY TABLE

SECTION 20: CRITICAL WARNINGS AND BEST PRACTICES

CRITICAL WARNINGS:

• Causes skin irritation (H315). Avoid skin contact. Use protective gloves.

• Causes serious eye irritation (H319). Use eye protection.

• May cause respiratory irritation (H335). Avoid inhalation of dust.

• Alkaline (pH 11-12). Handle with care; avoid contact with acids.

• Slightly hygroscopic. Protect from moisture.

• Reacts with CO₂. Forms sodium carbonate and tin hydroxide. Store in airtight containers.

• Non-combustible. Does not burn.

• Incompatibilities: Keep away from strong acids, acid chlorides, and oxidizing agents.

• Hygiene Requirement: Wash hands thoroughly after handling.

BEST PRACTICE RECOMMENDATIONS:

• Electroplating: Use as electrolyte in alkaline tin electroplating baths; Provides bright, smooth tin coatings; Used in tin alloy plating (Sn-Cu, Sn-Zn, Sn-Ni); Maintain proper bath composition and operating conditions.

• Textile Industry: Use as flame retardant and weighting agent for textiles; Provides durable flame retardancy; Adds weight and body to fabrics; Combine with other flame retardant additives for enhanced performance.

• Hydrogen Peroxide Stabilization: Use as stabilizer for hydrogen peroxide solutions; Prevents decomposition of H₂O₂; Forms stable complexes; Recommended concentration 0.1-1.0%.

• Glass and Ceramics: Use in glass polishing and ceramic applications; Provides surface finishing; Used in glaze formulations.

• Handling: Use in well-ventilated areas; Avoid dust generation; Wear protective gloves, safety goggles, and appropriate respiratory protection.

• Personal Protective Equipment: Protective gloves (nitrile, neoprene), safety goggles, protective clothing, NIOSH-approved dust mask.

• Hygiene: Wash hands thoroughly after handling; Do not eat, drink, or smoke when using; Remove contaminated clothing and wash before reuse.

• Storage: Store in tightly closed, properly labeled containers in dry conditions; Keep away from acids and oxidizing agents; Protect from moisture and CO₂.

• Spill Response: Avoid dust generation; Vacuum or wet-sweep; Place in closed containers; Do not allow to enter drains or waterways.

• Disposal: Dispose of in accordance with local, regional, and national regulations; Sodium stannate is considered non-hazardous waste.

SPECIAL NOTE ON ELECTROPLATING APPLICATIONS:

Sodium stannate is widely used in alkaline tin electroplating:

• Bath Composition: Sodium stannate (20-50 g/L), Sodium hydroxide (10-20 g/L), Organic additives

• Operating Conditions: Temperature 60-80°C, Current density 1-5 A/dm²

• Anodes: Pure tin anodes

• Applications: Electronic components, Tin alloy plating, Decorative coatings

SPECIAL NOTE ON HYDROGEN PEROXIDE STABILIZATION:

Sodium stannate is an effective stabilizer for hydrogen peroxide:

• Mechanism: Forms stable complexes with tin; Prevents catalytic decomposition

• Concentration: 0.1-1.0% typical

• Application: H₂O₂ storage and transportation; Bleaching processes

• Advantage: Provides long-term stability; Prevents decomposition

LEGAL DISCLAIMER:

The information provided in this document is based on our current knowledge and experience and is presented in good faith. However, as all conditions of use are beyond our control, this document does not constitute a binding specification or warranty. This Technical Data Sheet is for informational purposes only. Users are responsible for testing suitability for their own applications. For complete safety, storage, handling, transportation, waste, and regulatory compliance information, please refer to the official Safety Data Sheet (SDS/MSDS) provided by the manufacturer/supplier.