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Merck
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文件

60220

Sigma-Aldrich

磷酸钾 一元

buffer substance, anhydrous, puriss. p.a., ACS reagent, reag. ISO, reag. Ph. Eur., 99.5-100.5%

别名:

prim.-磷酸钾, 磷酸二氢钾

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About This Item

线性分子式:
KH2PO4
CAS号:
7778-77-0
分子量:
136.09
EC號碼:
231-913-4
MDL號碼:
MFCD00011401
分類程式碼代碼:
12352300
PubChem物質ID:
329758828
NACRES:
NA.21

等級

ACS reagent
anhydrous
puriss. p.a.

品質等級

100

agency

reag. ISO
reag. Ph. Eur.

化驗

99.5-100.5%

形狀

crystalline

雜質

≤0.001% total nitrogen (N)

損耗

≤0.2% loss on drying, 105 °C

pH值

4.2-4.5 (20 °C, 5%)

pKa (25 °C)

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

mp

252.6 °C (lit.)

溶解度

water: 0.5 g/10 mL, clear, colorless to light yellow

密度

2.338 g/mL at 25 °C (lit.)

負離子痕跡

chloride (Cl-): ≤5 mg/kg
sulfate (SO42-): ≤30 mg/kg

正離子痕跡

As: ≤0.5 mg/kg
Ca: ≤10 mg/kg
Cd: ≤5 mg/kg
Co: ≤5 mg/kg
Cr: ≤15 mg/kg
Cu: ≤5 mg/kg
Fe: ≤5 mg/kg
Mg: ≤5 mg/kg
Mn: ≤5 mg/kg
Na: ≤50 mg/kg
Ni: ≤5 mg/kg
Pb: ≤5 mg/kg
Zn: ≤5 mg/kg
heavy metals: ≤0.001% (by ICP)

SMILES 字串

[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 密鑰

GNSKLFRGEWLPPA-UHFFFAOYSA-M

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相关类别

一般說明

磷酸二氢钾广泛用于配制缓冲液，以制备生物样本和研究生物相互作用。

應用

磷酸二氢钾已用于：
  • 制备鲁米诺工作液，研究化学发光系统鲁米诺-H2O2的助氧化剂活性
  • 配制磷酸缓冲液(PBS)培养胚胎干细胞(ESC)并生成胚状体
  • 溶于PBS制备聚二甲基硅氧烷(PDMS)基底

儲存類別代碼

11 - Combustible Solids

水污染物質分類（WGK）

WGK 1

閃點（°F）

Not applicable

閃點（°C）

Not applicable

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