1.01961
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®
别名:
Potassium tetraoxalate dihydrate, Oxalic acid hemipotassium salt, Potassium hydrogen oxalate-oxalic acid-water (1/1/2)
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About This Item
经验公式（希尔记法）:
C4H3KO8 · 2H2O
CAS号:
分子量:
254.19
MDL编号:
UNSPSC代码:
41116107
EC索引号:
204-874-6
NACRES:
NA.24
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.
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
警示用语：
Warning
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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