Sodium arsenate dibasic heptahydrate
Sodium arsenate dibasic heptahydrate (CAS: 10048-95-0) is a hydrated inorganic salt with the linear formula Na<sub>2</sub>HAsO<sub>4</sub> · 7H<sub>2</sub>O and a molecular weight of 312.01 g/mol. Supplied by TSS as a crystalline solid with high purity (99.995% trace metals basis), this compound serves as a valuable reagent in chemical synthesis, catalysis research, and materials science, finding application in inorganic chemistry and general research settings.
- IUPAC
- Disodium hydrogen arsenate heptahydrate,Sodium hydrogenarsenate heptahydrate
- Synonyms
- Disodium hydrogen arsenate heptahydrateSodium hydrogenarsenate heptahydrate

Chemical Synthesis Reagent
Utilised as a source of arsenate ions in various chemical reactions, facilitating the synthesis of complex inorganic compounds and organoarsenic derivatives. Its high purity ensures reliable reaction outcomes.
Catalysis Research
Investigated for its potential role as a catalyst or catalyst precursor in specific chemical transformations, contributing to the development of new catalytic processes in materials science and inorganic chemistry.
Inorganic Chemistry Studies
Serves as a standard reagent for research and development in inorganic chemistry, particularly for studies involving arsenic compounds and their properties.
Materials Science Applications
Employed in the development and characterisation of novel materials, where the incorporation of arsenic can influence material properties for specialised applications.
| Molecular weight | 312.01 |
|---|---|
| Linear formula | Na2HAsO4 · 7H2O |
| Assay | 99.995% trace metals basis |
| Form | crystalline |
| Solubility | H2O: slightly soluble(lit.) |
| Impurities tested | ≤0.005% Insoluble matter |
| Melting point | 180 °C (dec.)(lit.) |



Hazard statements
- H301Toxic if swallowed
- H331Toxic if inhaled
- H350May cause cancer
- H410Very toxic to aquatic life with long-lasting effects
Precautionary statements
- P201Obtain special instructions before use
- 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, full-face particle respirator type N100 (US), Gloves, respirator cartridge type N100 (US), type P1 (EN143) respirator filter, type P3 (EN 143) respirator cartridges |
|---|---|
| Transport (UN / ADR) | UN 1685 6.1 / PGII |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | T,N |
| Risk statements (R) | 45-23/25-50/53 |
| Safety statements (S) | 53-45-60-61 |
| Cation traces | Fe: ≤0.001%heavy metals (as Pb): ≤0.002% |
| Anion traces | arsenite (As2O3): ≤0.01%chloride (Cl-): ≤0.001%nitrate (NO3-): ≤0.005%sulfate (SO42-): ≤0.01% |
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 arsenate dibasic heptahydrate used for?
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Sodium arsenate dibasic heptahydrate is used as a reagent in chemical synthesis, in catalysis research, and for studies in inorganic chemistry and materials science.
What are the CAS number and chemical formula for Sodium arsenate dibasic heptahydrate?
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The CAS number is 10048-95-0 and the linear formula is Na₂HAsO₄ · 7H₂O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium arsenate dibasic heptahydrate with an assay of 99.995% (trace metals basis). This product is not represented as USP, BP, or EP grade.
What are the primary safety concerns when handling this chemical?
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This compound is highly toxic if swallowed or inhaled (Danger: H301, H331), is a suspected human carcinogen (H350), and is very toxic to aquatic life with long-lasting effects (H410). Strict adherence to safety protocols, including the use of appropriate personal protective equipment and ventilation, is essential.
How is Sodium arsenate dibasic heptahydrate packed and shipped?
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Sodium arsenate dibasic heptahydrate is shipped as UN 1685, Class 6.1, Packing Group II, indicating it is a toxic substance. TSS ensures compliant packaging and documentation for global export.
How can I request a quote or sample?
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Please contact our sales team through the website or by phone to request a quote for Sodium arsenate dibasic heptahydrate or to arrange for a sample.
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