All of our high-purity pharmaceutical reference standards are provided with a comprehensive Certificate of Analysis and all supporting analytical data.

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Ranitidine Hydrochloride - Labeled d6 Catalog Number: R-5566 This compound comes fully certified.

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Repaglinide Catalog Number: R-5682 This compound comes fully certified.

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Repaglinide - Labeled d5 Catalog Number: R-7789 This compound comes with a comprehensive Certificate of Analysis.

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Rhein Catalog Number: R-6210 This compound comes with a comprehensive Certificate of Analysis.

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Rifaximin Catalog Number: R-6236 This compound comes fully certified.

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Rifaximin - Labeled d6 Catalog Number: R-6452 This compound comes fully certified.

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Ritonavir Catalog Number: R-6599 This compound comes fully certified.

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Ritonavir - Labeled d6 Catalog Number: R-6603 This compound comes fully certified.

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Rivastigmine Metabolite (NAP226-90) Catalog Number: R-6792 This compound comes fully certified.

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Rivastigmine Metabolite (NAP226-90) - Labeled d4 Catalog Number: R-6625 This compound comes fully certified.

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Rivastigmine Tartrate - Labeled d4 Catalog Number: R-7804 This compound comes fully certified.

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Rofecoxib Catalog Number: R-7814 This compound comes fully certified.