Clopidogrel free base is the same antiplatelet agent described above, used to prepare various salt forms; it requires its own distinct identity and purity specifications. Simson Pharma's Clopidogrel reference standard supports manufacturers working with the non-hydrochloride form.

Simson Pharma Global Ltd. (UK) and Simson Pharma Global LLC (USA) supply high-quality Clopidogrel Reference Standards, pharmacopoeial reference materials, and its related impurities to pharmaceutical manufacturers, CROs, analytical laboratories, universities, and regulatory organizations worldwide. To service the Europe and America market efficiently, Simson Pharma Limited has set up Simson Pharma Global Ltd. in United Kingdom and Simson Pharma Global LLC in USA respectively.