| 摘要 |
The storage stability of aqueous p-benzoquinone and in general compounds of the formula <IMAGE> where R1, R2, R3, and R4 may be the same or different and are selected, for example, from hydrogen, hydroxyl, cyano, halogen, carboxylic acid or ester, thio, thioethers, sulfonic acid or ester groups, sulfinic acid or ester groups, amino, alkylamino, dialkylamino, arylamino, diarylamino, alkylarylamino, cycloalkylamino, acylamino, acyloxy, acyl, nitro, C1-C20 substituted or unsubstituted, saturated or unsaturated, straight chain, branched or cyclic aliphatic moieties, C6-C32 substituted or unsubstituted aromatic moieties, and C1-C18 alkoxy moieties, are improved by the addition of water-soluble, acidic or neutral inorganic salts of Periodic Table Group IA elements, Group IIA elements, and nickel. Such salts are typified by CaCl2, KCl, MgSO4, NaBr, NaCl, and NiCl2.
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