How to reduce the content of 䓛 in plastics – urgent online request

The polycyclic aromatic hydrocarbons in plastics may originate from carbon black, mineral oil, etc.; it is necessary to improve the purity of the raw materials in order to reduce harmful substances.

CHR Chrysene 䓛(CHR): White or silver-gray, yellow-green scale-like or platy orthorhombic crystals; it forms colorless orthorhombic flakes in benzene, and exhibits purple fluorescence under ultraviolet light. Flammable. Toxic. Sublimes easily in a vacuum. Melting point: 255°C, boiling point: 440.7°C, relative density: 1.274. Slightly soluble in alcohol, ether, carbon disulfide, and glacial acetic acid; at 25°C, 1 g dissolves in 1300 ml of anhydrous ethanol and 480 ml of toluene. At 100°C, it dissolves approximately 5 parts in toluene, is slightly soluble in boiling benzene, and insoluble in water. Polycyclic Aromatic Hydrocarbons (PAHs) are volatile hydrocarbons produced when organic materials such as coal, petroleum, wood, tobacco, and organic polymers burn incompletely; they are significant environmental and food contaminants. To date, more than 200 PAHs have been identified, many of which are carcinogenic, such as benzo[a]pyrene and benzo[a]anthracene. PAHs are widely distributed in the environment and can be found in every corner of our lives; polycyclic aromatic hydrocarbons can be generated wherever organic materials are processed, discarded, burned, or used. According to experts, polycyclic aromatic hydrocarbons are organic compounds with strong carcinogenic properties; they can cause cancer in humans through breathing or direct skin contact. Among polycyclic aromatic hydrocarbons, benzo[a]pyrene has the greatest impact on the human body. It is a mutagen and a carcinogen; it is also highly lipophilic, allowing it to be inhaled into the body, reaching the alveoli and even the bloodstream, thereby causing lung cancer and cardiovascular diseases. Based on the above explanation, such substances can only have their residues reduced by controlling the raw materials. At the very source of plastic packaging is oil; therefore, attention should be paid during the oil refining process ； Furthermore, check whether such polycyclic aromatic hydrocarbon additives are included in the production process of plastic raw materials, and the formula should be adjusted as much as possible.