We use rick assess and DO NOT use it at <.0003M it says 7 - 10 can use it - I had documentation universities removed it due to harm to fertility ... Suggest researching before using ... Here is more information on ASSIST too
https://assist.asta.edu.au/question/373 ... id=6c5cca9
Potassium dichromate solution disposal
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Re: Potassium dichromate solution disposal
With thanks Kate