Renée:
  I have not heard of neutralizing RDO, but it would make sense if you want to be "gentle on your sewer system" BUT prepare to a large emission of carbon dioxide when attempting to neutralize it with baking soda.
  RDO + baking soda (or sodium bicarbonate) will produce water, salt with the acid in RDO (probably sodium chloride or common salt), and carbon dioxide in stoichiometrical amounts (1 CO2 per every 1 NaCl).
  Therefore that neutralization has to take place in a fumes hood, and you will have to decide which is worst: delivering acid to the sewer system, or carbon dioxide (the Greenhouse gas per excellence) to the atmosphere.
  It will be "your call".
  René J.

RENEE FISHER  wrote:
  Has anyone heard of neutralizing RDO with baking soda to P.H. 7.0. Our Histo lab had a hazardous waste assessment, and the consultant suggested we not throw the RDO down the drain but that we either collect it for waste removal or neutralize it with baking soda to p.h. 7.0. I have not heard of doing this and do not know of any procedure for it, everyone, anyone's help will be greatly appreciated.

Thanks,
Renee'

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