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Merck
CN

795488

磷酸二氢钾 一元

anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%

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:
7778-77-0
分子量:
136.09
NACRES:
NA.21
PubChem Substance ID:
329768487
UNSPSC Code:
12352302
EC Number:
231-913-4
MDL number:
MFCD00011401
Assay:
≥99%
Grade:
ACS reagent
anhydrous
Form:
powder or crystals
Solubility:
water: soluble (208 g/l at 20 °C (68 °F))

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产品名称

磷酸二氢钾 一元, anhydrous, free-flowing, Redi-Dri™, ACS reagent, ≥99%

InChI key

GNSKLFRGEWLPPA-UHFFFAOYSA-M

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

grade

ACS reagent
anhydrous

product line

Redi-Dri™

assay

≥99%

form

powder or crystals

quality

free-flowing

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)

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)

Quality Level

200

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相关类别

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）。

Features and Benefits

  • 提高效率——免除需要松散硬化粉末的时间和精力
  • 更加安全——避免使用工具大力敲碎团块的风险
  • 更加经济——制备和溶剂化速度更快，提高效率并节约成本
  • 质量保证——经过专业检测的出色品质，无抗结剂添加
  • 灵活的用量选择——有从研究到放大级别的用量规格可供选择

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 −376.1 kcalmol-1。可作为起始材料合成偏磷酸钾。

Redi-Dri™包装技术可避免盐类试剂结块，让你无需再通过复杂手段保持粉末自由流动。粉末维持干燥便于准确称量和轻松取用，改善实验结果。Redi-Dri™技术无抗结剂添加即可数月保持粉末的易用流动形式，让你不再需要对盐类试剂进行烘箱或干燥器干燥处理，或手动粉碎结块。重复取用后，结果依然准确。Redi-Dri™包装通过长期保证盐类试剂的方便易用，大幅节约您的时间、精力和金钱。

Legal Information

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

存储类别

11 - Combustible Solids

wgk

WGK 1

flash_point_f

Not applicable

flash_point_c

Not applicable

历史批次信息供参考:

分析证书(COA)

Lot/Batch Number
MKCZ6855
0000490087
0000490087
MKCX9234
MKCZ1024

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  1. How does Redi-Dri™ help keep salts and buffers free-flowing?

    Redi-Dri™ products are specially handled and the bottle is specially designed to ensure that the product will remain dry without adding impurities or additives to the product. Ensuring that you receive the highest quality material that is easy to handle.

  2. Are there any special storage conditions that must be maintained?

    No, Redi-Dri™ products can be stored under the same conditions as the equivalent non-Redi-Dri™ products.

  3. How long will material remain free-flowing after it is opened?

    While the exact amount of time your material will remain free-flowing can vary, this largely depends on the ambient storage conditions and how many times it is opened.

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商品

Redi-Dri™ – The World of Free-flowing Hygroscopic Products

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

实验方案

USP Dissolution Method for Folic Acid

Folic acid vs. folate differences and biological activities; implications in fortified foods and supplements for human health.

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