199011

Buffer solution

(Potassium tetraoxalate) traceable to SRM from NIST and PTB pH 1.68 (25°C) Certipur^®

• Synonym(s): pH Buffering Solution
• UNSPSC Code: 41116107
• NACRES: NA.25

Properties

• grade: certified reference material
• Quality Level: 300
• product line: Certipur^®
• pH: 1.7 (25 °C in H₂O)
• density: 1.003 g/cm³ at 20 °C
• application(s): environmental; food and beverages; general analytical; industrial qc; pharmaceutical
• format: mixture
• storage temp.: 15-25°C

Description

General description

The potassium tetraoxalate certified buffer solution is gravimetrically prepared using high-quality reagents and water at a registered calibration laboratory. Its pH value of 1.68 at 25°C is measured using a combined glass electrode following a 5-point calibration method. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The buffer′s pH value depends on the temperature and therefore a constant temperature must be maintained during its use.

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.

Legal Information

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

Safety Information

• Storage Class: 12 - Non Combustible Liquids
• wgk_germany: nwg
• flash_point_f: Not applicable
• flash_point_c: Not applicable