Sigma-Aldrich в компания по производству и продаже особо чистых химических веществ, реагентов, расходных материалов и т. д. Большую часть компания производит сама. Входит в индекс NASDAQ-100. Штаб квартира расположена в Миссури, США.
Продолжает официально выпускать особо чистый героин для исследовательских целей.
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