3

What is the proper way to dispose of used hydrochloric acid (e.g. Sureklean 600)? My municipal waste station does take toxic waste periodically but I was wondering if it can be safely flushed down the toilet. It is very corrosive to metal and I know there is cast iron sewer pipe below the basement leaving the house to the street. Also, is it safe to flush it from the environmental standpoint?

Tester101
  • 133,087
  • 80
  • 327
  • 617
amphibient
  • 7,702
  • 52
  • 152
  • 238

1 Answers1

9

HCl can be combined with baking soda to form salt water and CO2.

NaHCO3 + HCl = NaCl + H2O + CO2

NOTE this is exothermic and effervescent, mix slowly, adding the soda to the acid. In a wide-mouth container.

Matthew
  • 10,823
  • 23
  • 64
  • 109