All Photos(2)

1.06342

Supelco

Sodium dihydrogen phosphate dihydrate

for analysis EMSURE® Reag. Ph Eur

Synonym(s):
Sodium dihydrogen phosphate dihydrate, Sodium phosphate monobasic dihydrate, mono-Sodium orthophosphate, Sodium biphosphate, Sodium phosphate monobasic
Linear Formula:
NaH2PO4 · 2H2O
CAS Number:
Molecular Weight:
156.01
MDL number:
EC Index Number:
231-449-2

Quality Level

Agency/Method

reag. Ph. Eur.

assay

99.0-100.5% dry basis (alkalimetric)

form

crystals

potency

8290 mg/kg LD50, oral (Rat)
>7940 mg/kg LD50, skin (Rabbit)

pH

4.5 (25 °C, 12 g/L in H2O)

mp

60 °C

solubility

850 g/L

density

1.915 g/cm3 at 20 °C

bulk density

1000 kg/m3

anion traces

chloride (Cl-): ≤0.0005%
fluoride (F-): ≤0.001%
phosphate, phosphite (as H3PO4): ≤0.5%
sulfate (SO42-): ≤0.01%

cation traces

Al:, passes test (detectable with ammonia)
As: ≤ 0.00005%
Ca: ≤ 0.005%
Ca:, passes test (detectable with ammonia)
Cd: ≤ 0.0001%
Co: ≤ 0.005%
Cu: ≤ 0.005%
Fe: ≤ 0.001%
Hg: ≤ 0.0001%
K: ≤ 0.005%
Mg: ≤ 0.005%
N: ≤ 0.001%
Ni: ≤ 0.005%
Pb: ≤ 0.0004%
Zn: ≤ 0.025%
heavy metals (as Pb): ≤ 0.0005%

storage temp.

2-30°C

SMILES string

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

InChI

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

InChI key

VBJGJHBYWREJQD-UHFFFAOYSA-M

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Analysis Note

Identity: passes test
Appearance of solution: passes test
Assay (alkalimetric, calculated on dried substance): 99.0 - 100.5 %
In water insoluble matter (calculated on dried substance): ≤ 0.15 %
pH-value (1 %, water): 4.1 - 5.0
pH-value (5 %; water): 4.2 - 4.5
Chloride (Cl): ≤ 0.0005 %
Fluoride (F): ≤ 0.001 %
Total nitrogen (as N): ≤ 0.001 %
Hydrogenphosphate (HPO₄): ≤ 0.5 %
Sulfate (SO₄): ≤ 0.01 %
Heavy metals (as Pb): ≤ 0.0005 %
Al, Ca and other elements detectable with ammonia: passes test
As (Arsenic): ≤ 0.00005 %
Ca (Calcium): ≤ 0.005 %
Cd (Cadmium): ≤ 0.0001 %
Co (Cobalt): ≤ 0.005 %
Cu (Copper): ≤ 0.005 %
Fe (Iron): ≤ 0.001 %
Hg (Mercury): ≤ 0.0001 %
K (Potassium): ≤ 0.005 %
Mg (Magnesium): ≤ 0.005 %
Ni (Nickel): ≤ 0.005 %
Pb (Lead): ≤ 0.0004 %
Zn (Zinc): ≤ 0.025 %
Substances reducing potassium permanganate (as O): passes test
Loss on drying (130 °C): 21.5 - 24.0 %
Corresponds to 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

Certificate of Analysis

Certificate of Origin

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