This Standard Reference Material (SRM) is intended primarily for the evaluation of methods for analysis of cements and materials of similar matrix. A unit of SRM 633a consists of four vials, each containing approximately 5 g ofportland cement ground to pass through a 75 mum (No. 200) sieve, and each sealed into a foil pouch. For more information, please refer to the COA and SDS.SRM 633A_cert SRM 633A _SDS
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