hslg-tech

  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...

  Basalt fiber   (Basalt Fiber, referred to as BF) is a new type of inorganic environmentally friendly high-performance material, the color is generally brown, some like gold. It is composed of oxides such as SiO2, Al2O3, CaO, FeO, and a small amount of impurities, and each component in the fiber has its specific properties. Basalt continuous fiber As a reinforcing material, basalt fiber not only has good stability, but also has excellent mechanical properties and corrosion resistance. In addition, it has the advantages of good insulation, excellent thermal insulation and sound insulation performance, and good wave transmission performance. Because basalt ore itself gives basalt fiber many excellent properties, basalt fiber itself has high durability and excellent mechanical properties, and these advantages are very practical in military and civilian fields. At present, the fireproof cloth woven from basalt fiber has been used in the production of flame retardant and heat insu...

  Velcorin , also known as dimethyl dicarbonate, is a preservative approved by the Ministry of Health and complies with the Food Sanitation Law of the People's Republic of China and the Food Additive Sanitation Management Measures. The molecular formula is C4H6O5, and the relative molecular mass is 134.09. The boiling point is 172 ° C, at room temperature, it is a slightly astringent colorless liquid, usually used in beverage cans. DMDC has a broad-spectrum antibacterial effect. Its main target microorganisms are yeasts (including Saccharomyces cerevisiae, Zygosaccharomyces ruckerii, Rhodotorula, Candida, Pichia, Toluobacillus, Torula, Endosporium, Klerkia, Hansenula, etc.). It also has a disinfecting effect on many other bacteria (such as Acetobacter pasteurianus, Escherichia coli, Pseudomonas aeruginosa, Staphylococcus aureus, various lactobacilli, Pediococcus beer). DMDC has also been shown to kill E. coli 0157:H7. The antibacterial effect of DMDC is the result of inactivating e...

  Models of transdermal uptake of chemicals from clothing have been developed, but not compared with recent human subject experiments. In a well-characterized experiment, participants wore t-shirts pre-dosed with benzophenone-3 (BP-3) and BP-3 and a metabolite were monitored in urine voids.     Objective Compare a dynamic model of transdermal uptake from clothing to results of  the human subject experiment .   Methods The model simulating dynamic transdermal uptake from clothing was coupled with direct measurements of the gas phase concentration of  benzophenone -3 (BP-3) near the surface of clothing to simulate the conditions of the human subject experiment.   Results The base-case model results were consistent with the those reported for human subjects. The results were moderately sensitive to parameters such as the diffusivity in the stratum corneum (SC), the SC thickness, and SC-air partition coefficient. The model predictions were most sensitive t...