Sodium tellurite
Sodium tellurite (CAS: 10102-20-2), chemical formula Na₂TeO₃, is an inorganic compound with a molecular weight of 221.58 g/mol. This white powder is a tellurium salt, typically supplied at 99% purity. It serves as a critical reagent in various laboratory applications, particularly within materials science and metal and ceramic research, contributing to the development of advanced materials and analytical procedures.

Materials Science
Sodium tellurite is employed in materials science research for the synthesis and characterisation of novel materials. Its properties are leveraged in the development of compounds with specific electronic or optical characteristics.
Metal and Ceramic Science
In metal and ceramic science, sodium tellurite can be used as a precursor or additive in the processing of specialized alloys and ceramics. It contributes to achieving desired material properties through controlled chemical reactions.
Chemical Synthesis
As a tellurium salt, sodium tellurite functions as a reagent in various organic and inorganic synthesis pathways. It is a source of tellurium for creating more complex tellurium-containing compounds.
Chromogenic Agent
Sodium tellurite is recognised for its use in microbiological media as a selective agent. It helps in differentiating and identifying certain bacterial species based on their ability to reduce tellurite.
| Molecular weight | 221.58 |
|---|---|
| Linear formula | Na2TeO3 |
| Assay | 99% |
| Form | powder |
| Particle size | −100 mesh |

Hazard statements
- H301Toxic if swallowed
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3288 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T |
| Risk statements (R) | 23/24/25 |
| Safety statements (S) | 22-36/37/39-45 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Sodium Tellurite used for?
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Sodium Tellurite (CAS: 10102-20-2) is used in materials science, metal and ceramic research, chemical synthesis, and as a chromogenic agent in microbiological media.
What is the CAS number and chemical formula for Sodium Tellurite?
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The CAS number for Sodium Tellurite is 10102-20-2, and its chemical formula is Na₂TeO₃.
What grade and purity does Tech Serve Solutions supply for Sodium Tellurite?
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Tech Serve Solutions supplies Sodium Tellurite with an assay of 99%. This product is supplied for research and laboratory use and is not represented as USP, BP, EP, or pharmaceutical grade.
How should Sodium Tellurite be handled safely?
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Sodium Tellurite is toxic if swallowed, in contact with skin, or if inhaled (H301 + H311 + H331). Handle with appropriate personal protective equipment, including eyeshields, face shields, gloves, and P2 respirator cartridges. Ensure adequate ventilation and avoid dust formation.
Is Sodium Tellurite subject to any special regulations?
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Sodium Tellurite is classified as toxic. It is regulated under UN 3288, hazard class 6.1, Packing Group II, for transport purposes.
How is Sodium Tellurite packaged and exported by TSS?
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Sodium Tellurite is carefully packaged to ensure safe handling and transit. Tech Serve Solutions offers global export services for this chemical, adhering to all relevant shipping regulations.
How can I request a quote or sample of Sodium Tellurite?
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To request a quote or sample of Sodium Tellurite, please contact our sales department through the TSS website or by phone. Our team will be pleased to assist you with your inquiry.
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