caustic alkali

noun

Definition of caustic alkali

: a strong corrosive alkali especially : a hydroxide of an alkali metal (as caustic soda or caustic potash)

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“Caustic alkali.” The Merriam-Webster.com Dictionary, Merriam-Webster Inc., https://www.merriam-webster.com/dictionary/caustic%20alkali. Accessed 11 December 2019.

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