acetate ethanoate 758-12-3 71-50-1 Shotgun TCLP extraction fluid 2 c0050 Vinegar Acetate ions Acetic acid, ion(1-) ACETATE ION InChI=1/C2H4O2/c1-2(3)4/h1H3,(H,3,4)/p- CMC_13391 Azetat CH3-COO(-) CHEBI:30089 Ethanoat MeCO2 anion ZINC05224164 ACET Acetic acid glacial