🌐EnglishEnglishDeutschEspañolFrançaisItalianoPolskiРусскийالعربيةفارسی日本語EntityQ906323· pop 8· linked from 47 articlescertified reference materialAlso known as CRMstandards used to check the quality and metrological traceability of productsAvailable in 8 languagesEspañolFrançais日本語العربيةPolskiUkrainianفارسیvia Wikidata sitelinks · CC0ConnectionsNational Institute of Standards and TechnologyEntityUnited StatesCountryCategoriesAnalytical chemistryMeasurement