Sodium phosphate monobasic monohydrate

puriss. p.a., ACS reagent, ≥99.0% (T)

Sodium dihydrogen phosphate monohydrate, Monosodium phosphate
Linear Formula:
NaH2PO4 · H2O
CAS Number:
Molecular Weight:
EC Number:
MDL number:
PubChem Substance ID:

Quality Level


ACS reagent
puriss. p.a.


≥99.0% (T)




≤0.001% total nitrogen (N)
≤0.01% insoluble matter


4.1-4.5 (25 °C, 50 mg/mL in H2O)

anion traces

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

cation traces

As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤5 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
K: ≤50 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP-OES)

SMILES string




InChI key


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General description

Sodium phosphate monobasic monohydrate is a sodium salt.


Sodium phosphate monobasic monohydrate may be used in the following studies:
  • As a mobile phase in HPLC studies.
  • For the dissolution of BSA (Bovine serum albumin).
  • Preparation of buffer solutions.


13 - Non Combustible Solids

WGK Germany


Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Certificate of Origin

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