hslg-tech

  Benzophenone is an organic compound with the molecular formula (C6H5)2C=O, which can be abbreviated as Ph2CO. Diphenyl ketone, as the nucleus of diaryl ketone, is an important synthetic intermediate in organic chemistry. use Benzophenone can be used as a photoinitiator for UV curing of varnishes in the ink, imaging and printing industries. Diphenyl ketone prevents the damaging effects of UV light on fragrances or colorants in products such as perfumes and soaps. It can also be added to plastic bags as a UV shielding agent. By using benzophenone, manufacturers can dispense the product into clear glass bottles or plastic. If benzophenone is not available, opaque or black outer packaging is required. synthesis Diphenyl ketone can be prepared by reacting benzene with carbon tetrachloride to obtain diphenyl dichloromethane, and then continue to undergo hydrolysis reaction. [1] Or prepared by Friedel-Crafts acylation of benzene with benzoyl chloride in the presence of a Lewis acid catalyst

  Analysis of the presence of benzophenone in industry, food and other consumer products   1. Property analysis Structure and molecular formula of benzophenone and relative molecular mass   C 13 H 10 O Relative molecular mass: 182.22   Chemical and physical properties of the pure substance ►Description: colorless crystalline solid, with geranium or rose odor ►Boiling point: 305.4 °C ►Melting point: 48.5 °C (alpha type) and 26 °C (beta type) ►Density: 1.111 at 18 °C ►Vapor pressure: 1.93 × 10 -3 mm Hg at 25 °C ►Refractive index: 1.6077 at 19 °C ►Solubility: almost insoluble in water, but soluble in organic solvents such as ethanol, acetone, ether, acetic acid, chloroform and benzene. ►Flash point: > 110 °C ►Stability: decomposition by heat produces toxic gas; reacts with strong oxidizing agents. ►Octanol/water partition coefficient: log K ow , 3.18 ( LOGKOW, 2010 ) ► Henry's law constant: 1.9 × 10 -6 atm.m 3 /mol at 25 °C   Analysis of benzophenone (a) Air The United States of Am