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P0662

Sigma-Aldrich

Potassium phosphate monobasic

ACS reagent, ≥99.0%

Synonym(s):
prim.-Potassium phosphate, Monopotassium phosphate, Potassium dihydrogen phosphate
Linear Formula:
KH2PO4
CAS Number:
Molecular Weight:
136.09
EC Number:
MDL number:
PubChem Substance ID:
NACRES:
NA.21

Quality Level

grade

ACS reagent

assay

≥99.0%

form

powder

technique(s)

tissue culture: suitable

impurities

≤0.01% Insoluble matter

loss

≤0.2% loss on drying, 105°C

pH

4.1-4.5 (25 °C, 5%)

pKa (25 °C)

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

bp

>450 °C

mp

252.6 °C (lit.)

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% (by ICP)

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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General description

Potassium phosphate monobasic (monopotassium orthophosphate) is a water soluble inorganic salt. Its standard enthalpy of formation has been reported to be -376.1kcalmol-1. It acts a starting material in the synthesis of potassium metaphosphate.

Application

Potassium phosphate monobasic has been used in the preparation of phosphate buffer and phosphate buffered saline (PBS). It has also been used in the preparation of PEG1000 (poly ethylene glycol)/potassium phosphate aqueous two-phase systems (ATPS).

Packaging

25, 500, 6×500 g in poly bottle
12 kg in poly drum
1, 2.5, 4×2.5 kg in poly bottle

Legal Information

Redi-Dri is a trademark of Sigma-Aldrich Co. LLC

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

Enter Lot Number to search for Certificate of Analysis (COA).

Certificate of Origin

Enter Lot Number to search for Certificate of Origin (COO).

More Documents

Quotes and Ordering

Estimation of Wound Tissue Neutrophil and Macrophage Accumulation by Measuring Myeloperoxidase (MPO) and N-Acetyl-?-D-glucosaminidase (NAG) Activities.
Cassini-Vieira P, et al.
Bio-protocol, 5(22) (2015)
The solubility and reversion of calcium and potassium metaphosphates.
Volkerding CC and Bradfield R.
Soil Science Society of America Journal. Soil Science Society of America, 8(C), 159-166 (1944)
Standard enthalpies of formation of monopotassium and dipotassium orthophosphate.
Luff BB and Reed RB.
Journal of Chemical and Engineering Data, 23(1), 60-62 (1978)
Skin wound healing model-excisional wounding and assessment of lesion area.
Moreira CF, et al.
Bio-protocol, 5(22) (2015)
Jacek Zielonka et al.
Free radical biology & medicine, 46(3), 329-338 (2008-11-26)
Methods for the detection and quantitation of hydroethidine (HE) and its oxidation products by HPLC analysis are described. Synthetic methods for preparation of authentic standards (2-hydroxyethidium and diethidium) are provided. Potential applications of the HPLC methods to chemical and biological

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