Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 1552-42-7, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 1552-42-7
Crystal violet lactone is prepared by oxidizing 2-(4,4′-bis-dimethylaminobenzhydryl)-5-dimethylaminobenzoic acid in aqueous alkaline solution by means of a water-soluble ferricyanide salt or in the presence of a ferricyanide. A very pure crystal violet lactone is obtained in high yield.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H4144O – PubChem