Thank you all for the leads.  These will be helpful.  We have 7000+ pure chemicals to add both R-S and H/P phrases.

Several people responded indicating they were unsure of what these designations are –

Under the (slowly disappearing) EU chemical classification requirements, Risk and Safety Phrases had to be used in conjunction with a chemical.  Under GHS, similar, but not quite the same phrases and classifications must be added.

And, for the chemist R/S also refers to stereochemical configuration; but that is for an organic chemistry list, not this one!

Thanks

nl

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