Merck
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57618

Supelco

Potassium phosphate monobasic

suitable for HPLC, LiChropur, 99.5-101.0% (T)

Synonym(s):
Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate
Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
EC Number:
MDL number:

assay

99.5-101.0% (T)

form

solid

quality

LiChropur

technique(s)

HPLC: suitable

pH

4.1-4.5

pKa (25 °C)

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

mp

252.6 °C (lit.)

solubility

H2O: 10%, clear, colorless

density

2.338 g/mL at 25 °C (lit.)

λ

10 % in H2O

UV absorption

λ: 210 nm Amax: ≤0.1
λ: 220 nm Amax: ≤0.06
λ: 230 nm Amax: ≤0.04
λ: 300 nm Amax: ≤0.02
λ: 500 nm Amax: ≤0.02

SMILES string

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

InChI

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

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

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Legal Information

LiChropur is a trademark of Merck KGaA, Darmstadt, Germany

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Certificate of Analysis

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Certificate of Origin

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