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71650 Sigma-Aldrich

Sodium phosphate dibasic dodecahydrate

puriss. p.a., crystallized, ≥99.0% (T)

Synonym: sec-Sodium phosphate, Disodium hydrogen phosphate dodecahydrate, Disodium phosphate, di-Sodium hydrogen phosphate dodecahydrate

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Properties

Related Categories Analytical Reagents, Analytical Reagents for General Use, Analytical/Chromatography, Essential Chemicals, Puriss p.a.,
InChI Key   DGLRDKLJZLEJCY-UHFFFAOYSA-L
grade   puriss. p.a.
assay   ≥99.0% (T)
quality   crystallized
pH   9.0-9.3 (25 °C, 50 mg/mL in H2O)
solubility   water: soluble 35.8 g/L at 20 °C
anion traces   chloride (Cl-): ≤5 mg/kg
  fluoride (F-): ≤5 mg/kg
  sulfate (SO42-): ≤50 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

Description

Packaging

1 kg in poly bottle

Application

Sodium phosphate dibasic dodecahydrate may be used to prepare the 0.1M phosphate buffer having pH 7.4.

General description

Sodium phosphate is a colorless crystalline sodium salt. It is widely used as a buffer in molecular biology, biochemistry, and chromatographic studies. It exists in three forms: monobasic (NaH2PO4), dibasic (Na2HPO4), and tribasic (Na3PO4). Monobasic and dibasic forms in varying ratios are commonly used to compose the neutral sodium phosphate buffer solution.

Safety & Documentation

Safety Information

WGK Germany 
1
RTECS 
TC5725000
Protocols & Articles
Peer-Reviewed Papers
15

References

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