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RDD020

Sigma-Aldrich

Potassium phosphate monobasic

anhydrous, free-flowing, Redi-Dri, ReagentPlus®, ≥99.0% (titration)

Synonym(s):

Monopotassium phosphate, Potassium dihydrogen phosphate, prim.-Potassium phosphate

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About This Item

Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
EC Number:
MDL number:
UNSPSC Code:
12161700
PubChem Substance ID:
NACRES:
NA.21

grade

anhydrous

Quality Level

product line

ReagentPlus®
Redi-Dri

Assay

≥99.0% (titration)

form

crystalline

quality

free-flowing

pKa (25 °C)

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

mp

252.6 °C (lit.)

solubility

water: 100 mg/mL, clear, colorless

density

2.338 g/mL at 25 °C (lit.)

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

ReagentPlus is a registered trademark of Merck KGaA, Darmstadt, Germany
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

13 - Non Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable


Certificates of Analysis (COA)

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Articles

Redi-Dri™ prevents hygroscopic powders, such as inorganic salts, from absorbing moisture and forming clumps, leaving the salts free-flowing every time.

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