Crossword Genius

Methanal (12)

Ross

I believe the answer is:

formaldehyde

<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">methanal</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I know that methanal can be written as formaldehyde)</span><br/ ><br/ >This is the entire clue.<br/ ></span>

(Other definitions for formaldehyde that I've seen before include "Creatures preserved here" , "Preservative for biological specimens" , "Gas used as preservative" .)

I've seen this clue in The Times and The Sunday Times.
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