Halogen Derivatives of Acids and Phenols

In the absence of humidity and in the dark, phosgene COCI2 does not attack aluminium. In the presence of humidity, released hydrochloric acid attacks aluminium [15]. 

Chloroacetyl chloride CH2CICOCI, acetyl chloride CH3COCI, propionyl chloride CH3CH2COCI, 

The same applies to sodium trichloroacetate CClsCOONa, an herbicide known under the reference TCA, the solutions of which strongly attack aluminium. 

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