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Merck
CN

71644

Sigma-Aldrich

di-Sodium hydrogen phosphate dihydrate

BioUltra, ≥99.0% (T)

Synonym(s):

sec-Sodium phosphate, Disodium hydrogen phosphate dihydrate, Disodium phosphate, Sodium phosphate dibasic dihydrate

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About This Item

Linear Formula:
Na2HPO4 · 2H2O
CAS Number:
10028-24-7
Molecular Weight:
177.99
EC Number:
231-448-7
MDL number:
MFCD00149182
UNSPSC Code:
12352200
PubChem Substance ID:
329763394

Key Documents

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product line

BioUltra

Assay

≥99.0% (T)

form

crystals

impurities

insoluble matter, passes filter test
≤0.001% total nitrogen (N)

pH

8.9-9.2 (25 °C, 0.5 M in H2O)

solubility

H2O: 0.5 M at 20 °C, clear, colorless

anion traces

chloride (Cl-): ≤10 mg/kg
sulfate (SO42-): ≤50 mg/kg

cation traces

Al: ≤5 mg/kg
As: ≤0.1 mg/kg
Ba: ≤5 mg/kg
Bi: ≤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
Li: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Mo: ≤5 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Sr: ≤5 mg/kg
Zn: ≤5 mg/kg

λ

0.5 M in H2O

UV absorption

λ: 260 nm Amax: 0.03
λ: 280 nm Amax: 0.03

SMILES string

O.O.[Na+].[Na+].OP([O-])([O-])=O

InChI

1S/2Na.H3O4P.2H2O/c;;1-5(2,3)4;;/h;;(H3,1,2,3,4);2*1H2/q2*+1;;;/p-2

InChI key

KDQPSPMLNJTZAL-UHFFFAOYSA-L

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Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

Regulatory Information

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