MilliporeSigma
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PX1565

Supelco

Potassium phosphate monobasic

Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

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

Agency

meets USP/NF

assay

≥99% (acidimetric)

form

crystals

impurities

≤0.01% Insoluble matter

loss

≤ 0.2% loss on drying, 105°C

color

white

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%

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

2.5 kg in Plastic bottle
500 g in Plastic bottle
12 kg in Plastic drum
50 kg in Drum, fibre

Application

Meets ACS Specifications, Meets Reagent Specifications for testing USP/NF monographs GR ACS

Analysis Note

Assay (acidimetric)99.0% minChloride (Cl)0.001% maxColorWhiteFormCrystalsHeavy 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% 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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