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What QC tests are done for the dyes to make sure they are “good?” Is there a functional test to prove the dyes can label things?

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What QC tests are done for the dyes to make sure they are “good?” Is there a functional test to prove the dyes can label things?

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The bulk dye is analyzed by HPLC, UV/vis, and NMR spectroscopy to confirm identity and purity. The packaged dye is analyzed by HPLC and UV/vis to confirm the amount of intact NHS meets specifications.

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