This certified reference material (CRM) is produced in accordance with ISO 17034 and characterized in accordance with ISO/IEC 17025. This CRM is traceable to SI unit kg and measured against primary material from an NMI, e.g. NIST. 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.

500ml in HD-PE bottle

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Certipur is a registered trademark of Merck KGaA, Darmstadt, Germany.

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