04269

Sodium phosphate monobasic dihydrate

98-100.5% (calc. to the dried substance), meets analytical specification of Ph. Eur., BP, USP, FCC, E 339

• Synonym(s): Sodium dihydrogen phosphate dihydrate
• Linear Formula: NaH₂PO₄ · 2H₂O
• CAS Number: 13472-35-0
• Molecular Weight: 156.01
• EC Number: 231-449-2
• MDL number: MFCD00149209
• UNSPSC Code: 12161700
• PubChem Substance ID: 329747903
• NACRES: NA.25

Properties

• Quality Level: 200
• Assay: 98-100.5% (calc. to the dried substance)
• form: powder or crystals
• quality: meets analytical specification of Ph. Eur., BP, USP, FCC, E 339
• impurities: heavy metals (as Pb), complies; organic volatile impurities, complies; reducing matter, complies; related substances, complies; residual solvents, complies; ≤0.2% water-insoluble matter
• 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%)
• anion traces: chloride (Cl^-): ≤50 mg/kg; fluoride (F^-): ≤10 mg/kg; sulfate (SO₄^2-): ≤200 mg/kg
• 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
• suitability: complies for appearance of solution
• SMILES string: O.O.[Na+].OP(O)([O-])=O
• InChI: 1S/Na.H3O4P.2H2O/c;1-5(2,3)4;;/h;(H3,1,2,3,4);2*1H2/q+1;;;/p-1
• InChI key: VBJGJHBYWREJQD-UHFFFAOYSA-M

Description

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.

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable