How Do You Dispose of Muriatic Acid?
Quick Answer
Proper disposal of muriatic acid is carried out by mixing it with a 10 percent sodium carbonate solution to neutralize it. However, muriatic acid is a hazardous substance, so it's a good idea to check with your local hazardous-waste disposal department for specific disposal information. When in doubt, contact it for help.
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In most locations, after muriatic acid has been neutralized, it can be disposed of into the sewer. Before disposing of neutralized muriatic acid, it's recommended to check the pH with a pH strip to make sure the pH is near seven.
Disposal of muriatic acid is strongly recommended if storage is impractical. Although laboratory-grade sodium carbonate is preferred for neutralization, it's possible to use food-grade baking soda.
Muriatic acid is a hazardous substance that must be handled with care. Recommendations for its handling include wearing personal protective equipment such as nitrile gloves, 100-percent-cotton long-sleeved shirts and pants, and safety glasses or goggles. If muriatic acid is being stored, it must be stored upright in a closed container and checked regularly for leaks.
Muriatic acid should only be neutralized in a fume hood or open area, so the fumes given off by the acid are dispersed or extracted. Using a fume hood is preferable because even the vapor is corrosive and hazardous.
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