Sodium phosphate dibasic dihydrate
SIGALD/30435 - puriss. p.a., reag. Ph. Eur., 98.5-101.0% (calc. to the dried substance)
Synonym: sec-Sodium phosphate; Disodium hydrogen phosphate dihydrate; Disodium phosphate; di-Sodium hydrogen phosphate dihydrate
CAS Number: 10028-24-7
Empirical Formula (Hill Notation): HNa2O4P · 2H2O
Molecular Weight: 177.99
EC Number: 231-448-7
MDL Number: MFCD00149182
Linear Formula: Na2HPO4 · 2H2O
Product Type: Chemical
agency | reag. Ph. Eur. |
USP/NF | |
anion traces | chloride (Cl-): ≤10 mg/kg |
sulfate (SO42-): ≤50 mg/kg | |
assay | 98.5-101.0% (calc. to the dried substance) |
cation traces | As: ≤0.5 mg/kg |
Fe: ≤5 mg/kg | |
K: ≤50 mg/kg | |
form | crystals |
grade | puriss. p.a. |
impurities | reducing impurities, complies |
≤0.0005% heavy metals (as Pb) | |
≤0.001% total nitrogen (N) | |
≤0.5% NaH2PO4 (calc. to dried subst.) | |
InChI | 1S/2Na.H3O4P.2H2O/c;;1-5( |
InChI key | KDQPSPMLNJTZAL-UHFFFAOYSA |
loss | 19.5-21.0% loss on drying, 130 °C |
pH | 9.0-9.2 (20 °C, 5%) |
Quality Level | 200 ![]() |
SMILES string | O.O.[Na+].[Na+].OP([O-])( |
suitability | in accordance for appearance of solution |
Application: | Sodium phosphate dibasic dihydrate is used: • In the synthesis of BiOCl/BiPO4 composites from bismuth nitrate pentahydrate and potassium chloride by the microwave-assisted hydrothermal method. • To prepare sodium phosphate buffer solution. • As a phosphorus source in the synthesis of Mg-doped hydroxyapatite nanoplates. |
General description: | Sodium phosphate dibasic dihydrate is a highly hygroscopic and water-soluble compound. It is used in water softeners, cleaners also as buffers in particular formulations. |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | 98.5-101.0% (calc. to the dried substance) |
UNSPSC | 12352300 |