Intermediates

Fluorene is a polycyclic aromatic hydrocarbon with white flake crystal. It has fluorescence when impure, and has a characteristic aromatic smell similar to naphthalene. It is found in the high boiling components of automobile exhaust, corn whisker and coal tar. Combustible. It is insoluble in water, but soluble in benzene, carbon disulfide, ethanol and ether. Fluorene can be synthesized in industry and used as precursor of dye, plastics and insecticide. It can be used to synthesize 9-fluorenone, 9-fluorenol and trinitrofluorenone. Polyfluorene can be used as a light emitter in organic light emitting diodes. The 9-position proton of fluorene is acidic with pKa of 22.6 (DMSO), which can be removed by alkali (such as sodium hydroxide) to form orange yellow aromatic anion. The anion can be used as a nucleophilic reagent to replace the electrophilic reagent at 9-position. Fluorene derivative 9-fluorenyl methyl chloroformate (Fmoc CL) is used to give fluorene methoxycarbonyl protection to amino groups in peptide synthesis.

This product can be used as medicine, pesticide and dye intermediate.

This product is used as organic synthesis intermediate and dye intermediate.

Ginseng extract is a product made from the dried root of ginseng. Ginsenoside is the main active ingredient, and also contains many ingredients needed by human body, such as sugar, protein, amino acids, vitamins and many trace elements. It has the functions of anti-cancer, anti-tumor, improving digestive system, promoting metabolism, and improving human immunity. It can also promote blood circulation, enhance skin elasticity, prevent skin aging, dryness and dryness, so as to regenerate human skin and delay skin cell aging.

This product is widely used in the synthesis of phthalocyanine sulfonamide drugs, phthalocyanine pigments and dyes, high thermal resistance polyamide fibers, xylenyl and diisocyanate plastics and desulfurization catalysts. It is used in the synthesis of dyes, pigments and other organic compounds.