The term "OSR EA Grade" doesn't appear to be a widely recognized acronym or term in the context of the chemical industry as of my last knowledge update in September 2021. It's possible that it may refer to a specific product, standard, or regulation that was introduced or became relevant after that date.

In the chemical industry, "EA" could stand for Environmental Assessment or Environmental Analysis, and "OSR" might have a variety of interpretations depending on the specific context. It could be a company name, a specific product or process, or even a regulatory term.

osr/emeramide ea grade
IUPAC Name：N1,N3-bis(2-sulfanylethyl)benzene-1,3-dicarboxamide
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Manufacturer: Fandachem
cas 351994-94-0
Use: mercury chelator,treatment of mercury poisoning.
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If you are looking for information about a specific term or concept related to the chemical industry, I would recommend checking more recent and specialized sources, industry publications, or regulatory agencies' websites for the most uptodate information. Additionally, providing more context or details about "OSR EA Grade" could help in providing a more specific answer.