propanoyl propanoate propanoic acid 1-oxopropyl ester propionic acid propionyl ester 123-62-6 Methylacetic anhydride PROPIONIC ANHYDRIDE Propanoic acid, anhydride Propanoic anhydride Propionic acid anhydride Propionic anhydride [UN2496] [Corrosive] Propionyl oxide UN2496 P51478_ALDRICH PROPANOIC ACID,ANHYDRIDE InChI=1/C6H10O3/c1-3-5(7)9-6(8)4-2/h3-4H2,1-2H 240311_ALDRICH 4-02-00-00722 (Beilstein Handbook Reference) AI3-26975 Anhydrid kyseliny propionove [Czech] BRN 0507066 Caswell No. 708 EINECS 204-638-2 EPA Pesticide Chemical Code 077704 HSDB 1215