acetic anhydride

noun Chemistry.
a colorless, pungent liquid, C 4 H 6 O 3 , the anhydride of acetic acid: used chiefly as a reagent and in the production of plastics, film, and fabrics derived from cellulose.

Origin:
1875–80

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World English Dictionary
acetic anhydride
 
n
a colourless pungent liquid used in the manufacture of cellulose and vinyl acetates for synthetic fabrics. Formula: (CH3CO)2O

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Example sentences
We have found that acetic anhydride in presence of catalytic amount of iodine is an excellent acylating reagent for cellulose.
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