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SX0723

Sodium phosphate dibasic

anhydrous, HPLC, Meets ACS Specifications

Synonym(s):

Disodium Hydrogen Phosphate, Anhydrous, Disodium Hydrogen Phosphate, sec-Sodium phosphate, Disodium hydrogen phosphate, Disodium phosphate, Sodium hydrogenphosphate

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About This Item

Linear Formula:
Na2HPO4
CAS Number:
7558-79-4
Molecular Weight:
141.96
UNSPSC Code:
12352302
EC Index Number:
231-448-7
MDL number:
MFCD00003496
Assay:
≥99.0%
Grade:
ACS reagent
Form:
crystalline powder
Solubility:
77 g/L
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grade

ACS reagent

Quality Segment

assay

≥99.0%

form

crystalline powder

technique(s)

HPLC: suitable

impurities

≤0.01% Insoluble matter

loss

≤0.2% loss on drying

pH

8.7-9.3 (20 °C, 10 g/L in H2O)

pKa (25 °C)

(1) 2.15, (2) 6.82, (3) 12.38 (phosphoric acid)

mp

250 °C (decomposition)

solubility

77 g/L

anion traces

chloride (Cl-): ≤0.002%, sulfate (SO42-): ≤0.005%

cation traces

Fe: ≤0.002%, heavy metals (as Pb): ≤0.001%

UV absorption

λ: 280 nm Amax: ≤0.05

shipped in

ambient

storage temp.

room temp

SMILES string

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

InChI

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

InChI key

BNIILDVGGAEEIG-UHFFFAOYSA-L

Application

anhydrous, HPLC, Meets ACS Specifications

Analysis Note

Assay99.0% minChloride (Cl)0.002% maxFormWhite crystalline powderHeavy metals (as Pb)0.001% maxInsoluble matter0.01% maxIron (Fe)0.002% maxLoss on drying0.2% maxSulfate (SO4)0.005% maxUV Absorbance (1 M, water, 280 nm)0.05AU maxpH of a 5% solution at 25°C8.7-9.3

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Storage Class

13 - Non Combustible Solids

WGK

WGK 1

Flash Point (°F)

Not applicable

Flash Point (°C)

Not applicable

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