Merck
CN
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文件

1.01961

Supelco

Potassium tetraoxalate dihydrate

certified secondary standard reference material for pH measurement; directly traceable to primary reference material from NIST/PTB pH (S) = 1.67₉ (25°C) Certipur®

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别名:
Potassium tetraoxalate dihydrate, Oxalic acid hemipotassium salt, Potassium hydrogen oxalate-oxalic acid-water (1/1/2)
经验公式(希尔记法):
C4H3KO8 · 2H2O
CAS号:
分子量:
254.19
MDL编号:
EC索引号:
204-874-6

等级

certified reference material

质量水平

Agency

complies with DIN 19266

产品线

Certipur®

pH值(酸碱度)

1.7 (25 °C, 12.6 g/L in H2O)

溶解性

25 g/L

密度

1.84 g/cm3 at 20 °C

堆积密度

860 kg/m3

应用

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

格式

neat

储存温度

15-25°C

InChI

1S/2C2H2O4.K/c2*3-1(4)2(5)6;/h2*(H,3,4)(H,5,6);/q;;+1/p-1

InChI key

GANDVAJEIJXBQJ-UHFFFAOYSA-M

一般描述

Certipur® certified secondary standard reference buffers are used to precisely calibrate and monitor pH measurement instruments and buffer solutions. They are quality controlled and qualified in our ISO/IEC 17025 and ISO 17034 accredited calibration laboratories against certified primary standard reference materials (SRM) in compliance with DIN 19266, IUPAC, NIST, Ph. Eur and USP. Certipur® reference materials offer maximum accuracy, reliability and convenience and help avoid costly repeat analyses.
Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

应用

Potassium tetraoxalate dihydrate [pH (S) = 1.67₉ (25 °C)] is a certified secondary standard reference material used as a calibration buffer standard for pH instruments or pH electrodes.

特点和优势

  • The product is delivered with a comprehensive, batch-specific Certificate of Analysis showing the relevant data for the quality management system.
  • The pH value of this Certipur® buffer solution is qualified using differential potentiometry with two platinum hydrogen electrodes against NIST & PTB primary reference materials [pH (S) = 1.679 (25 °C)].
  • This buffer standard has a guaranteed shelf life of 4 years.
  • Potassium tetraoxalate dihydrate buffer is a Certified Reference Material (CRM) offered in neat format. Solution of this standard is prepared in-house following instructions in European Pharmacopoeia (Ph. Eur. 2.2.3).
  • Intended for extremely precise calibration, qualification and monitoring of pH instruments and routine assessment of their performance.

分析说明

pH-value (25 °C): 1.674 - 1.683

法律信息

CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, Germany

象形图

Exclamation mark

警示用语:

Warning

危险声明

危险分类

Acute Tox. 4 Dermal - Acute Tox. 4 Oral - Eye Irrit. 2

储存分类代码

11 - Combustible Solids

WGK

WGK 1


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