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High-purity anhydrous and dihydrate forms available for precision chemical synthesis.
Strong reducing agent with rapid, controllable reactivity in aqueous and alcoholic media.
Excellent solubility in water, ethanol, and dilute HCl—enabling flexible formulation integration.
Stabilizes sensitive compounds (e.g., antioxidants, dyes) against oxidative degradation.
Low volatility and non-hygroscopic handling characteristics under controlled storage conditions.
Tin-plating electrolytes for corrosion-resistant metal finishing on steel and copper substrates.
Catalyst in esterification and transesterification reactions for biopolymer and plasticizer synthesis.
Reducing agent in analytical chemistry for spectrophotometric determination of gold, mercury, and nitrate.
Stabilizer in food-grade packaging inks and PVC heat stabilizer systems (where permitted).
Key precursor in the production of organotin compounds for agrochemical intermediates.
| Chemical Type | Inorganic tin(II) salt |
| Product Form | Anhydrous powder or dihydrate crystals (SnCl₂·2H₂O) |
| Appearance | White to off-white crystalline solid; may develop slight yellow tint upon air exposure |
| Melting Point (Anhydrous) | 246–247 °C (decomposes) |
| Primary Applications | Reduction, catalysis, electroplating, analytical reagent |
| Key Features | High reducing power (E° = −0.14 V vs. SHE), low chloride impurity profile |
| Benefits | Precise stoichiometry control, minimal side-product formation, batch-to-batch consistency |
| Regulatory Compliance | Meets ACS Reagent Grade specifications; compliant with ISO 9001 manufacturing controls |
| Common Compatible Systems | Suitability |
| Aqueous HCl solutions (0.1–2 M) | Highly Recommended – Ensures Sn²⁺ stability and prevents hydrolysis |
| Ethanol/water co-solvent systems | Recommended – Suitable for organic-phase reduction without precipitation |
| Acidified tin-plating baths (e.g., fluoborate-based) | Highly Recommended – Maintains uniform deposition and bath longevity |
| PVC thermal stabilizer blends (with Ca/Zn soaps) | Suitable – Effective co-stabilizer at ≤0.5 wt%, subject to regulatory approval |
Q1: What is the CAS Registry Number for stannous chloride?
A: Anhydrous stannous chloride: CAS 7772-99-8; Stannous chloride dihydrate: CAS 10025-69-1.
Q2: How should stannous chloride be dosed in tin-plating electrolytes?
A: Typical concentration range is 25–45 g/L SnCl₂ in acidic fluoborate or sulfate-based baths; precise dosage depends on current density and substrate geometry—consult technical bulletin TB-SN-07 for optimization.
Q3: How does stannous chloride compare to sodium stannite in electroless plating applications?
A: Stannous chloride offers superior stability in acidic formulations and higher tin ion availability, whereas sodium stannite is alkaline-limited and prone to oxidation—making SnCl₂ preferred for robust, pH-controlled processes.
Q4: Is stannous chloride approved for use in food-contact materials?
A: Not as a direct additive; however, it is permitted as a processing aid in FDA 21 CFR 178.3750 (tin catalysts for polyester resins) and EU Regulation (EC) No 10/2011 under strict migration limits (<0.01 mg/kg food simulant).
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