Shampoo preservatives in excess, increase the risk of sensitization

Recently, the media chose the head and shoulders, rejoice, realisation, l 'oreal Paris, difficulty, la, overlord, zhuifeng, raise the 9 models such as yuan qing mainly anti-dandruff shampoo on the market on the basis of the comparison test. In terms of safety, tested the shampoo in the two kinds of common preservative methyl isopropyl thiazole moiety ketone ( MIT) And methyl chloride different thiazole moiety ketone ( CMIT) 。 This year on March 12, also to the world trade organization (the European commission WTO) Released the limit at MIT and CMIT as a preservative used in cleaning type cosmetics, because it may cause skin irritation. Bawang group research and development center, deputy director of Zhang Rongwen had said to the media, is different thiazole Lin ketone and its derivatives in recent years more and more widely used an antiseptic, CMIT and MIT under the distribution of 3 to 1 will form the preservative casson ( KATHON) 。 Shampoo, bath dew wash products use casson more as a preservative, because it is a kind of water-borne preservatives, has the characteristics of easy flushing no residue. According to the cosmetics health standards ( The 2007 edition) 'Regulation, MIT alone maximum allowable in cosmetic use concentration is 0. 01% ( 100ppm) ； And a mixture of CMIT and MIT is largest in cosmetic allows the use of concentration of 0. 0015% ( 15ppm) ( In a mixture of CMIT and MIT 3:1) 。 Makes the MIT and CMIT detection concentration of 4 PPM, quantitative concentration for 13 PPM.