Chemistry is traditionally divided into organic and inorganic chemistry. SDS of cas: 125-20-2, The former is the study of compounds containing at least one carbon-hydrogen bonds.In a patent，Which mentioned a new discovery about 125-20-2
Extraction spectrophotometric determination of sulfidic yperite, based on the reaction with four phthaleins, was developed. The method is technically simpler than the determination of yperites with reagent T-135 (alkaline-aqueous ethanolic thymolphthalein solution) because it does not require heating at 80C, cooling and acidification of the reaction mixture. Selection of the appropriate phthalein, and particularly optimization of the reagent composition and extraction of the coloured reaction product in chloroform, markedly increased the selectivity of the determination of yperites (HD, HN-3). The reaction is performed in a medium of increased polarity due to the low content of alcohol which enables the reaction to proceed at temperatures of 5-20C without any marked loss of sensitivity. Using 1H and 13C NMR spectroscopy, the reaction products of HD and o- cresolphthalein were identified and an ionic mechanism for the reaction of HD with phthaleins is suggested.
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Reference：
Benzofuran – Wikipedia,
Benzofuran | C8H4303O – PubChem