Sodium phosphate dibasic
Sodium phosphate dibasic (CAS 7558-79-4), with the molecular formula Na2HPO4 and a molecular weight of 141.96 g/mol, is an inorganic salt. It presents as a white crystalline powder. This compound is frequently employed in chemical synthesis and as a laboratory reagent. Its properties make it suitable for various applications requiring a buffering agent or a source of phosphate ions in solution.
- IUPAC
- sec-Sodium phosphate,Disodium hydrogen phosphate,Disodium phosphate,Sodium hydrogenphosphate
- Synonyms
- Disodium hydrogen phosphateDisodium phosphateSodium hydrogenphosphatesec-Sodium phosphate
Chemical Synthesis
Serves as a reagent in various organic and inorganic synthesis pathways, often acting as a buffer or a pH adjusting agent.
Laboratory Reagent
Utilised in analytical chemistry and research laboratories for preparing buffer solutions and in specific experimental procedures.
pH Adjustment
Its buffering capacity allows for the maintenance of stable pH levels in aqueous solutions, crucial for many chemical processes.
| Molecular weight | 141.96 |
|---|---|
| Linear formula | Na2HPO4 |
| Assay | ≥99.0% |
| Density | 1.064 g/mL at 20 °C |
| Solubility | H2O: soluble8 partsH2O: very soluble (Hot)alcohol: insoluble |
| pH | 8.7-9.3 (25 °C, 5% in solution) |
| Concentration | 0.5 M in H2O |
| Loss on drying | ≤0.2% loss on drying, 105°C |
| Impurities tested | ≤0.002% Chloride (Cl)≤0.01% Insoluble matter |
| 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 | Fe: ≤0.002%heavy metals (as Pb): ≤0.001% |
| Anion traces | sulfate (SO42-): ≤0.005% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Pharmacopeia | testing conforms to Pharmacopeia |
|---|---|
| Pka 25 °C | (1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid) |
| Uv Absorption | λ: 260 nm Amax: 0.019λ: 280 nm Amax: 0.016 |
| Absorption | A1M/260, H2O A1M/280, H2O <0.05 |
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 used for?
+
Sodium phosphate dibasic is used in chemical synthesis, as a laboratory reagent, and for pH adjustment in various aqueous systems.
What is the CAS number and chemical formula for Sodium phosphate dibasic?
+
The CAS number is 7558-79-4 and the chemical formula is Na2HPO4.
What grade and purity does Tech Serve Solutions supply?
+
Tech Serve Solutions supplies Sodium phosphate dibasic with an assay of ≥99.0%. We do not represent this product as USP, BP, or EP grade.
How should Sodium phosphate dibasic be handled?
+
Handle with care, using appropriate personal protective equipment including eyeshields and gloves. Ensure adequate ventilation. Refer to the safety data sheet for comprehensive handling guidelines.
Is Sodium phosphate dibasic a controlled substance?
+
The provided data does not indicate that Sodium phosphate dibasic is a controlled substance.
How is Sodium phosphate dibasic shipped or exported?
+
Sodium phosphate dibasic is shipped as UN 3077, Class 9, Packing Group III.
How can I request a quote or sample?
+
Please contact the TSS sales team via our website or direct contact details to request a quote or a sample of Sodium phosphate dibasic.
▶ Related products
1-(2-Fluorobenzyl)piperazine
C11H15FN2
Chemical Synthesis
1-(2-Fluorophenyl)biguanide hydrochloride
Chemical Synthesis
1-(2-Fluorophenyl)cyclopropanecarboxylic acid
C10H9FO2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine
C10H13FN2
Chemical Synthesis
1-(2-Fluorophenyl)piperazine monohydrochloride
C10H13FN2 · HCl
Chemical Synthesis
1-(2-Furoyl)-1H-benzotriazole
C11H7N3O2
Chemical Synthesis
1-(2-Furoyl)piperazine
C9H12N2O2
Chemical Synthesis
1-(2-Hydroxy-5-methylphenyl)-3-phenyl-1,3-propanedione
Chemical Synthesis
▶ Explore more
3-Methyl-1,5-di-p-tolyl-1,4-pentazadiene
Chemical Synthesis
3-Methyl-1,5-pentanediol
Chemical Synthesis
3-Methyl-1-(2-methylphenyl)-1H-pyrazol-5-amine
C11H13N3
Chemical Synthesis
3-Methyl-1-(3′-sulfoamidophenyl)-5-pyrazolone
C10H11N3O3S
Chemical Synthesis