Sigma-Aldrich Potassium Tetraoxalate Dih

Grade

certified reference material

Quality Level

300

Agency

complies with DIN 19266

Product Line

Certipur^®

pH

1.7 (25 °C, 12.6 g/L in H₂O)

Solubility

25 g/L

Density

1.84 g/cm³at 20 °C

Bulk Density

860 kg/M³

Application(S)

environmental
food and beverages
general analytical
industrial QC
pharmaceutical

Format

neat

Related Categories

Physical & Chemical Property Standards

General Description

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.

Application

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.

Features And Benefits

• 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.

Analysis Note

pH-value (25 °C): 1.674 - 1.683CERTIPUR is a registered trademark of Merck KGaA, Darmstadt, GermanyGHS07H302 + H312 - H319P264 - P270 - P280 - P301 + P312 - P302 + P352 + P312 - P305 + P351 + P338