Sodium phosphate dibasic heptahydrate
SIGALD/S9390 - ACS reagent, 98.0-102.0%
Synonym: Disodium hydrogen phosphate heptahydrate; Disodium phosphate
CAS Number: 7782-85-6
Empirical Formula (Hill Notation): HNa2O4P · 7H2O
Molecular Weight: 268.07
EC Number: 237-707-0
MDL Number: MFCD00149180
Linear Formula: Na2HPO4 · 7H2O
Product Type: Chemical
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: S9390-100G
This image depicts SKU: S9390-100G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: S9390-500G
This image depicts SKU: S9390-500G
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: S9390-1KG
This image depicts SKU: S9390-1KG
This picture is provided solely for illustration purposes. Optical properties of the actual product may deviate. Relevant product information is printed on labeled products and other accompanying or available information material.
This image depicts SKU: S9390-2.5KG
This image depicts SKU: S9390-2.5KG
| anion traces | chloride (Cl-): ≤0.001% |
| sulfate (SO42-): ≤0.005% | |
| assay | 98.0-102.0% |
| cation traces | Fe: ≤0.001% |
| heavy metals: ≤0.001% (by ICP) | |
| density | 1.68 g/mL at 25 °C (lit.) |
| form | powder |
| grade | ACS reagent |
| impurities | ≤0.005% Insoluble matter |
| InChI | 1S/2Na.H3O4P.7H2O/c;;1-5( |
| InChI key | PYLIXCKOHOHGKQ-UHFFFAOYSA |
| pH | 8.7-9.3 (25 °C, 5% in solution) |
| Quality Level | 200  |
| SMILES string | O.O.O.O.O.O.O.[Na+].[Na+] |
| vapor density | 4.9 (vs air) |
| Application: | A mixture of sodium phosphate dibasic heptahydrate, potassium phosphate monobasic, and NaCl in deionized water is used for the preparation of phosphate-buffered saline (PBS, pH 7.4). PBS is used as a buffer solution in biological research to keep the pH constant. |
| General description: | Sodium phosphate dibasic heptahydrate is a hydrated form of disodium phosphate (DSP) or disodium hydrogen orthophosphate. DSP is widely used as a pH regulator and saline laxative. |
| Packaging: | 1, 2.5, 4×2.5 kg in poly bottle |
| Packaging: | 100, 500, 6×500 g in poly bottle |
| WGK Germany | WGK 1 |
| Flash Point(F) | Not applicable |
| Flash Point(C) | Not applicable |
| Purity | 98.0-102.0% |
| Density | 1.68 g/mL at 25 °C (lit.) |
| UNSPSC | 12352300 |