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Merck

PX1565

Potassium phosphate monobasic

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

Synonym(s):

Potassium Dihydrogen Phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate

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About This Item

Linear Formula:
KH2PO4
CAS Number:
7778-77-0
Molecular Weight:
136.09
UNSPSC Code:
12352302
EC Index Number:
231-913-4
MDL number:
MFCD00011401
assay:
≥99% (acidimetric)
grade:
ACS reagent
form:
crystals
solubility:
soluble 208 g/L

Product Name

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

InChI

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

SMILES string

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

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

grade

ACS reagent

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

Quality Level

200

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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

Application

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

Storage Class

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

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