Sigma Aldrich and Merck offers a wide range of certified reference materials. With Cerilliant, RTC and Supelco, Sigma-Aldrich offers three in-house manufactured high quality CRM brands all produced under ISO/IEC 17025 and ISO Guide 34 double accreditation. In addition, we distribute certified reference materials from internationally recognised CRM producers such as IRMM, Paragon Scientific or Whitehouse Scientific.

Our portfolio of over 20,000 products includes standards for environmental, petrochemical, pharmaceutical, clinical diagnostic and toxicology, forensic, food and beverage, GMO standards, cosmetic, veterinary and much more, as well as OEM and custom products and services. All standards manufacturing sites are at a minimum double accredited to ISO/IEC 17025, ISO Guide 34 and ISO 17034, which is the highest achievable quality level for reference material producers.