Sodium phosphate monobasic dihydrate
SIGALD/04269 - 98-100.5% (calc. to the dried substance), meets analytical specification of Ph. Eur., BP, USP, FCC, E 339
Synonym: Sodium dihydrogen phosphate dihydrate
CAS Number: 13472-35-0
Empirical Formula (Hill Notation): H2NaO4P · 2H2O
Molecular Weight: 156.01
EC Number: 231-449-2
MDL Number: MFCD00149209
Linear Formula: NaH2PO4 · 2H2O
Product Type: Chemical
anion traces | chloride (Cl-): ≤50 mg/kg |
fluoride (F-): ≤10 mg/kg | |
sulfate (SO42-): ≤200 mg/kg | |
assay | 98-100.5% (calc. to the dried substance) |
cation traces | Al:, in accordance |
As: ≤1 mg/kg | |
Ca: ≤20 mg/kg | |
Ca:, in accordance | |
Cd: ≤1 mg/kg | |
Cu: ≤10 mg/kg | |
Fe: ≤5 mg/kg | |
Hg: ≤1 mg/kg | |
Mg: ≤20 mg/kg | |
Pb: ≤4 mg/kg | |
Zn: ≤10 mg/kg | |
form | powder or crystals |
impurities | heavy metals (as Pb), complies |
organic volatile impurities, complies | |
reducing matter, complies | |
related substances, complies | |
residual solvents, complies | |
≤0.2% water-insoluble matter | |
InChI | 1S/Na.H3O4P.2H2O/c;1-5(2, |
InChI key | VBJGJHBYWREJQD-UHFFFAOYSA |
loss | 21.5-24.0% loss on drying, 130 °C |
pH | 4.1-5.0 (20 °C, 1%) |
4.2-4.5 (20 °C, 5%) | |
quality | meets analytical specification of Ph. Eur., BP, USP, FCC, E 339 |
Quality Level | 200 ![]() |
SMILES string | O.O.[Na+].OP(O)([O-])=O |
suitability | complies for appearance of solution |
Application: | Sodium phosphate monobasic dihydrate has been used for preparing phosphate buffer solution. It has also been used as a mobile phase for high-performance liquid chromatography. |
Biochem/physiol Actions: | Sodium phosphate monobasic also referred to as sodium dihydrogen phosphate is a chemical reagent possesses high buffering capacity and is used for preparing biological buffers. It was used as a phosphate supplement for determining whether phosphate supplementation can prevent rickets in very low birth weight infants with prenatal deficiency of phosphate. |
RIDADR | NONH for all modes of transport |
WGK Germany | WGK 1 |
Flash Point(F) | Not applicable |
Flash Point(C) | Not applicable |
Purity | 98-100.5% (calc. to the dried substance) |
UNSPSC | 12161700 |