Selenous acid
Selenous acid (CAS 7783-00-8), chemical formula H2SeO3, is an inorganic acid containing selenium in the +4 oxidation state. With a molecular weight of 128.97 g/mol, it presents as a white crystalline solid. This compound is primarily utilised in chemical synthesis, as a reagent in analytical chemistry, and in the preparation of other selenium compounds. Its properties also lend it to applications within materials science and microelectronics.
- IUPAC
- Selenious acid
Chemical Synthesis Reagent
Selenous acid serves as a key precursor for synthesising various selenium-containing organic and inorganic compounds. It is instrumental in redox reactions and the formation of metal selenides.
Analytical Chemistry
In analytical laboratories, selenous acid can be employed as a reducing agent or in specific qualitative and quantitative analyses. Its reaction behaviour is utilised in titrimetric methods.
Materials Science
This acid is used in the development of novel materials, particularly in the field of semiconductor research and the creation of selenium-doped materials for electronic applications.
Microelectronics Manufacturing
Selenous acid finds application in the micro/nanoelectronics industry, potentially in deposition processes or as a component in the formulation of etching or cleaning solutions.
| Molecular weight | 128.97 |
|---|---|
| Linear formula | H2SeO3 |
| Assay | 98% |
| Density | 3.004 g/mL at 25 °C(lit.) |
| Melting point | 70 °C (dec.)(lit.) |
Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H373May cause damage to organs through prolonged exposure
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P273Avoid release to the environment
- P301IF SWALLOWED
- P311Call a POISON CENTER or doctor
- P501Dispose of contents and container per local regulations
| Protective equipment | Eyeshields, Faceshields, Gloves, type P2 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 3283 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 23/25-33-50/53 |
| Safety statements (S) | 20/21-28-45-60-61 |
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 Selenous Acid (CAS 7783-00-8) used for?
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Selenous acid is primarily used in chemical synthesis, as a reagent in analytical chemistry, and in the preparation of other selenium compounds. It also finds application in materials science and micro/nanoelectronics.
What is the CAS number and chemical formula for Selenous Acid?
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The CAS number for Selenous Acid is 7783-00-8, and its chemical formula is H2SeO3.
What grade and purity does Tech Serve Solutions supply for Selenous Acid?
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Tech Serve Solutions supplies Selenous Acid with a minimum assay of 98%. We do not represent this product as USP, BP, or EP grade.
How is Selenous Acid (H2SeO3) handled and shipped?
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Selenous Acid is classified as toxic and an environmental hazard (H301, H331, H373, H410). Handling requires appropriate personal protective equipment, including eyeshields, face shields, gloves, and P2 respirator cartridges. It is shipped as UN 3283, Class 6.1, Packing Group II.
How can I request a quote or sample for Selenous Acid?
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To request a quote or sample of Selenous Acid, please contact the Tech Serve Solutions sales team via our website or direct inquiry channels.
Is Selenous Acid a controlled substance?
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The provided data does not indicate that Selenous Acid is a controlled substance. However, users should always comply with local regulations regarding its procurement and handling.
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