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Merck

431478

Sodium phosphate dibasic heptahydrate

≥99.99% trace metals basis

Synonym(s):

Disodium hydrogen phosphate heptahydrate, Disodium phosphate

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About This Item

Linear Formula:
Na2HPO4 · 7H2O
CAS Number:
Molecular Weight:
268.07
NACRES:
NA.22
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
237-707-0
MDL number:
Assay:
≥99.99% trace metals basis
Form:
solid
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vapor density

4.9 (vs air)

Quality Segment

assay

≥99.99% trace metals basis

form

solid

impurities

≤0.005% insolubles, <100 ppm total metallic impurities

pH

8.7-9.3

density

1.68 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%, sulfate (SO42-): ≤0.005%

cation traces

Fe: ≤0.001%, heavy metals: ≤0.001%

functional group

phosphate

SMILES string

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

InChI

1S/2Na.H3O4P.7H2O/c;;1-5(2,3)4;;;;;;;/h;;(H3,1,2,3,4);7*1H2/q2*+1;;;;;;;;/p-2

InChI key

PYLIXCKOHOHGKQ-UHFFFAOYSA-L

Application

Sodium phosphate dibasic heptahydrate has been used to prepare sodium phosphate buffer and phosphate-buffered saline (PBS) buffer.[44}

Features and Benefits

Meets A.C.S. reagent specifications.


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Storage Class

13 - Non Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

ppe

Eyeshields, Gloves, type N95 (US)



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