| 摘要 |
PROBLEM TO BE SOLVED: To remove impurities from 1,1,1,5,5,5-hexafluoroacetylacetone dihydrate containing the impurities. SOLUTION: An organic solvent scarcely dissolving the 1,1,1,5,5,5- hexafluoroacetylacetone dihydrate is brought into contact with the 1,1,1,5,5,5- hexafluoroacetylacetone dihydrate containing the impurities to remove the impurities.
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