Merck
All Photos(2)

1.06586

Supelco

di-Sodium hydrogen phosphate

anhydrous for analysis EMSURE® ACS,Reag. Ph Eur

Synonym(s):
Sodium hydrogenphosphate, Disodium phosphate, Disodium hydrogen phosphate, Sodium phosphate dibasic, sec-Sodium phosphate
Linear Formula:
Na2HPO4
CAS Number:
Molecular Weight:
141.96
MDL number:
EC Index Number:
231-448-7

Quality Level

grade

ACS reagent

Agency

reag. Ph. Eur.

product line

EMSURE®

assay

≥99.0% (alkalimetric)

form

solid

potency

>2000 mg/kg LD50, oral (Rat)

impurities

≤0.01% Insoluble matter

loss

≤ 0.2% loss on drying, 105 °C

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)

bulk density

880 kg/m3

anion traces

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

cation traces

Cu: ≤0.0003%
Fe: ≤0.001%
K: ≤0.01%
Pb: ≤0.001%
heavy metals: ≤0.001%

storage temp.

2-30°C

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

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Related Categories

Linkage

Replaces: SX0720; SX0720-1; SX0720-5; SX0720-7; SX0720-20

Analysis Note

Assay (alkalimetric): ≥ 99.0 %
Insoluble matter: ≤ 0.01 %
pH-value (5 %; water, 25 °C): 8.7 - 9.3
Chloride (Cl): ≤ 0.002 %
Sulfate (SO₄): ≤ 0.005 %
Heavy metals (ACS): ≤ 0.001 %
Cu (Copper): ≤ 0.0003 %
Fe (Iron): ≤ 0.001 %
K (Potassium): ≤ 0.01 %
Pb (Lead): ≤ 0.001 %
Loss on Drying (105 °C): ≤ 0.2 %
Corresponds to ACS, Reag. Ph Eur

Legal Information

EMSURE is a registered trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

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