The term "OSR EA grade" doesn't seem to be a widely recognized term in the context of chemical manufacturing. However, chemical manufacturing often involves various grades of materials, such as reagent grade, analytical grade, or industrial grade chemicals. These grades indicate the purity and quality of the chemicals used in manufacturing processes.

For example:
1. Reagent grade chemicals are typically of the highest purity and are suitable for laboratory and analytical work.
2. Analytical grade chemicals are of high purity and suitable for analytical techniques but may not be as rigorously controlled as reagent grade.
3. Industrial grade chemicals may have lower purity and are used in largerscale manufacturing processes where absolute purity is not always required.

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IUPAC Name：N1,N3-bis(2-sulfanylethyl)benzene-1,3-dicarboxamide
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cas 351994-94-0
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