Strontium carbonate
CAS 1633-05-2
EC 216-643-7
Formula CH2O3.Sr
MW 147.63 g/mol
Salts & Minerals Pharmaceuticals & HealthcarePlastics & PolymersCoatings, Adhesives, Sealants & Elastomers pH Regulation & BufferingAntioxidant & StabilizerPreservation & BiocideCatalysis
Description
Strontium Carbonate (CAS 1633-05-2) is an inorganic salt derived from strontium, commercially known under designations including C.I. 77837, Pigment White 34, SW-K, and strontianite. It carries no assigned E-code and is registered under EC number 216-643-7 with the molecular formula CH2O3.Sr.
In plastics and polymer stabilization, Strontium Carbonate acts as a heat stabilizer by neutralizing acidic degradation byproducts generated during high-temperature processing, slowing polymer chain breakdown. In coatings and sealant formulations, it functions as a pH buffer and mild antimicrobial agent, helping to maintain formulation stability and inhibit microbial growth over time.
Strontium Carbonate is supplied as a free-flowing powder and is subject to REACH registration requirements for EU market supply. Procurement should confirm grade specifications against relevant purity standards for pharmaceutical or industrial applications. HS code 2836920000 applies for customs classification across EU member states.
In plastics and polymer stabilization, Strontium Carbonate acts as a heat stabilizer by neutralizing acidic degradation byproducts generated during high-temperature processing, slowing polymer chain breakdown. In coatings and sealant formulations, it functions as a pH buffer and mild antimicrobial agent, helping to maintain formulation stability and inhibit microbial growth over time.
Strontium Carbonate is supplied as a free-flowing powder and is subject to REACH registration requirements for EU market supply. Procurement should confirm grade specifications against relevant purity standards for pharmaceutical or industrial applications. HS code 2836920000 applies for customs classification across EU member states.
Physical Properties
| Melting Point | 1494 °C |
| Density | 3.5 g/cm³ |
| Appearance | Milky white free flowing powder |
| Color | white |
| Odor | Odorless |
| Form | Powder |
| Water Solubility | Soluble in ammonium chloride. Slightly soluble in ammonia and water. |
| Refractive Index | 1.518 |
| pH | 7-8 (20°C, 0.01g/L in H2O) |
| Log P | -0.809 (est) |
Trade & Regulatory
| HS Code | 2836920000 |
Other Names
SW-Kci77837C.I. 77837strontianitePigment White 34C.I. Pigment White 34Strontium(II) carbonate
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Raw Materials
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