P0662
磷酸二氢钾 一元
ACS reagent, ≥99.0%
别名:
prim.-磷酸钾, 磷酸二氢钾
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关于此项目
线性分子式:
KH2PO4
化学文摘社编号:
分子量:
136.09
NACRES:
NA.21
PubChem Substance ID:
UNSPSC Code:
12352302
EC Number:
231-913-4
MDL number:
Assay:
≥99.0%
Grade:
ACS reagent
Form:
powder or crystals
Solubility:
water: soluble (208 g/l at 20 °C (68 °F))
grade
ACS reagent
Quality Segment
agency
suitable for EPA 300, suitable for SM 5210
assay
≥99.0%
form
powder or crystals
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.)
solubility
water: soluble (208 g/l at 20 °C (68 °F))
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
General description
磷酸二氢钾（正磷酸一钾）是水溶无机盐。它形成的标准焓是-376.1kcalmol-1。它是合成偏磷酸钾的起始物质。
Application
磷酸二氢钾用于制备磷酸缓冲液和磷酸盐缓冲液（PBS）。它还可以用来制备PEG1000（聚乙二醇）/磷酸钾水二相体系（ATPS）。
Other Notes
Legal Information
Redi-Dri is a trademark of Sigma-Aldrich Co. LLC
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存储类别
13 - Non Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable