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Benzenesulfonic acid, 4-dodecyl-, cerium(4+) salt consists of cerium cations and benzenesulfonic acid (4-C10-13-sec-alkyl derivate) anions. Based on the solubility of Benzenesulfonic acid, 4-dodecyl-, cerium(4+) salt in water, a complete dissociation resulting in cerium and benzenesulfonic acid (4-C10-13-sec-alkyl) ions may be assumed under environmental conditions.

The concept of biodegradation is not applicable to inorganic elements, including cerium. However, sodium 4-undecylbenzenesulfonate (CAS 68411-30-3), a structural analogue of benzenesulfonic acid (4-C10-13-sec-alkyl derivate) is readily biodegradable.

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