Hi Joe, 
A specific answer to your question, regarding Ventana not DAKO waste. The volume of  DAB in the waste is very small and diluted considerably by the other solvent free solutions.
It can be thrown down the sink, washed down with plenty of water.

However there is a technique for deactivation of DAB which is applicable to any form of DAB waste.
Prepare a 2 mol/litre H2SO4 solution, and a 0.2 mol/litre KMnO4 solution
	- Add 50 ml of each solution to the Ventana DAB waste to be destroyed
	- Let the 3 solutions react overnight
	- Discard the solution into a regular sink, and wash down with plenty of water.

Hope this is of use, 
Best regards
Emma


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