Sodium phosphate dibasic dodecahydrate
Sodium phosphate dibasic dodecahydrate (CAS: 10039-32-4; Na2HPO4 · 12H2O) is a hydrated inorganic salt with a molecular weight of 358.14. This white crystalline powder is readily soluble in water and exhibits alkaline properties. It finds application as a buffering agent, a laboratory reagent in chemical synthesis, and in various industrial processes requiring a source of dibasic sodium phosphate. TSS supplies this compound meeting stringent quality standards.
- IUPAC
- sec-Sodium phosphate,Disodium hydrogen phosphate dodecahydrate,Disodium phosphate,di-Sodium hydrogen phosphate dodecahydrate
- Synonyms
- Disodium hydrogen phosphate dodecahydrateDisodium phosphate dodecahydratesec-Sodium phosphatedi-Sodium hydrogen phosphate dodecahydrate
Chemical Synthesis Reagent
Utilised as a pH buffer and reagent in organic and inorganic synthesis. Its controlled properties make it valuable for reactions sensitive to pH fluctuations.
Inorganic Salt Applications
Serves as a source of dibasic sodium phosphate in various industrial applications. Its hydrated form offers convenient handling and dissolution characteristics.
Laboratory Buffering Agent
Employed in laboratory settings for the preparation of buffer solutions, particularly where a mildly alkaline pH is required. Essential for maintaining stable pH environments in experimental setups.
| Molecular weight | 358.14 |
|---|---|
| Linear formula | Na2HPO4 · 12H2O |
| Assay | ≥99.0% |
| Solubility | H2O: soluble0.1 M at 20 °C, clear, colorless |
| pH | 9.0-9.3 (20 °C, 5%) |
| Impurities tested | Reducing matter, complies≤0.001% Total nitrogen (N)≤0.005% In water insoluble matters≤0.5% NaH2PO4(calc. to dried subst.) |
| Suitability | complies for appearance of solution |
| Protective equipment | Eyeshields, Gloves, type N95 (US), type P1 (EN143) respirator filter |
|---|---|
| Transport (UN / ADR) | UN 3077 9 / PGIII |
| Water hazard class (WGK, DE) | 1 |
| Cation traces | As: ≤0.5 mg/kgCu: ≤5 mg/kgFe: ≤5 mg/kgK: ≤10 mg/kgPb: ≤2 mg/kgZn: ≤5 mg/kg |
| Anion traces | chloride (Cl-): ≤5 mg/kgsulfate (SO42-): ≤50 mg/kg |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Pharmacopeia | testing conforms to Pharmacopeia |
|---|---|
| Uv Absorption | λ: 260 nm Amax: 0.01λ: 280 nm Amax: 0.01 |
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 phosphate dibasic dodecahydrate used for?
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Sodium phosphate dibasic dodecahydrate is used as a buffering agent, a laboratory reagent in chemical synthesis, and in various industrial processes.
What are the CAS number and chemical formula for Sodium phosphate dibasic dodecahydrate?
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The CAS number is 10039-32-4 and the chemical formula is Na2HPO4 · 12H2O.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Sodium phosphate dibasic dodecahydrate with an assay of ≥99.0%. This product is tested to conform to pharmacopoeia standards; however, TSS does not represent it as USP, BP, or EP grade unless explicitly stated.
How should Sodium phosphate dibasic dodecahydrate be handled safely?
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Handle with appropriate personal protective equipment including eyeshields and gloves. A type N95 (US) or type P1 (EN143) respirator filter is recommended if dust is generated. Avoid contact with skin and eyes.
Is Sodium phosphate dibasic dodecahydrate regulated as a hazardous substance for transport?
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Yes, it is classified as UN 3077, Class 9, Packing Group III (Environmentally Hazardous Substance, Solid, N.O.S.).
How are your chemicals packed and exported?
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Tech Serve Solutions packages and exports chemicals with meticulous attention to safety and regulatory compliance, ensuring products reach customers worldwide in optimal condition.
How can I request a quote or sample?
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To request a quote or sample, please contact our sales team through the TSS website or by direct enquiry, providing the product name and CAS number.
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