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      OST Research Chemicals Inc. (hereinafter referred to as the OST) was established in the United States,  San Francisco, is a company specializing in the production of standard products. Company after years of development, has become the industry's leading high-tech companies. Over the years, OST has been linked to government agencies, pharmaceutical companies, testing agencies, universities laboratory have good relations of cooperation.
      OST now we offer more than 100 countries and regions of the world's laboratory tens of thousands of kinds of standard products, mainly including drug impurity reference substance, industrial standard, food safety...
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