No they are not the same. R-0003 is DPD reagent #3 for measuring CC in the FAS-DPD test and TC in the DPD test, and R-0600 is orthotolidine for the OTO test.
You can't depend on the cap colors being unique. Yellow caps generally mean that the reagent is part of a chlorine test, but the color doesn't tell you which chlorine related reagent it is.
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