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Hydrolysis of cinerin I has calculated half-lives of 24 and 2.4 years at pH values of 7 and 8, respectively. Occupational exposure to cinerin I may occur through inhalation and dermal contact with this compound at workplaces where pyrethrum, of which cinerin I is a component of, is produced or used.

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Pyrethrin II | C22H28O5 - PubChem

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