MilliporeSigma
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PX1562

Supelco

Potassium phosphate monobasic

HPLC, Meets ACS Specifications

Synonym(s):
prim.-Potassium phosphate, Potassium Dihydrogen Phosphate, Monopotassium phosphate, Potassium dihydrogen phosphate
Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
MDL number:
EC Index Number:
231-913-4

Quality Level

assay

≥99%

form

crystals

technique(s)

HPLC: suitable

impurities

≤0.01% Insoluble matter

loss

≤0.2% loss on drying, 105°C

pH

4.2-4.6 (20 °C, 20 g/L in H2O)

mp

252.6 °C (lit.)

solubility

soluble 208 g/L

density

2.338 g/mL at 25 °C (lit.)

anion traces

chloride (Cl-): ≤0.001%
sulfate (SO42-): ≤0.003%

cation traces

Fe: ≤0.002%
Na: ≤0.005%
heavy metals: ≤0.001%

UV absorption

λ: 254 nm Amax: ≤0.04

shipped in

ambient

storage temp.

room temp

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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Packaging

500 g in Plastic bottle

Application

HPLC, Meets ACS Specifications

Analysis Note

Assay99.0% minChloride (Cl)0.001% maxFormWhite crystalsHeavy Metals (by ICP-OES)0.001% maxInsoluble matter0.01% maxIron (Fe)0.002% maxLoss on drying (105°C)0.2% maxSodium (Na)0.005% maxSulfate (SO4)0.003% maxUV Absorbance (1 M, water, 254 nm)0.04AU maxpH of a 5% solution at 25°C4.1-4.5

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Quality

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