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di-Sodium hydrogen phosphate dihydrate

buffer substance for chromatography LiChropur

Synonym(s):

di-Sodium hydrogen phosphate dihydrate, Sodium monohydrogen phosphate, Sodium phosphate dibasic, 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:
Molecular Weight:
177.99
MDL number:
UNSPSC Code:
12161703
EC Index Number:
231-448-7
NACRES:
NB.21

Quality Level

assay

≥99.0% (acidimetric)

form

solid

potency

>2000 mg/kg LD50, oral (Rat)

technique(s)

HPLC: suitable

pH

9.0-9.4 (20 °C, 50 g/L in H2O)

mp

92.5 °C (Elimination of water of crystallisation)

density

2.1 g/cm3 at 20 °C

bulk density

850‑1000 kg/m3

storage temp.

2-30°C

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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Analysis Note

Identity: passes test
pH-value (5 %; water): 9.0 - 9.2
Assay (acidimetric): ≥ 99.0 %
Self-absorption (215 nm; 0.2 mol/l; 1 cm; water): ≤ 0.15
Self-absorption (220 nm; 0.2 mol/l; 1 cm; water): ≤ 0.05
Self-absorption (254 nm; 0.2 mol/l; 1 cm; water): ≤ 0.02

Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Storage Class

13 - Non Combustible Solids

wgk_germany

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable


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