Hair damage

Conditioners, Hpids, acid tinses, and related cosmetics have been developed to minimize hair damage from these rather destmctive processes. 

J. Chem. Ed., 54 (1977) 553 and include in your report a discussion of the relevance of pH in hair cleansing or conditioning and in hair damage. Propose mechanisms for the pH action. How do depilatories work Within what pH range should children s shampoos be ... 

As indicated earlier, for hair damaged by sunlight, in most cases, the amino acids of the cuticle are altered to a greater extent than those of the cortex because the outer layers of the fiber receive higher intensities of radiation. Hair protein degradation by light radiation has been shown to... 

Shampooing and grooming actions cause the cuticle to be more susceptible to further abrasion/erosion and the lifting of scales and other types of hair damage described in this section. These actions can also lead to increased diffusion of chemicals into hair and to additional damage by penetrating chemicals or products. 

Weigmann, H.D. Analysis and quantification of hair damage. Progress Report No. 2.TRI Princeton, Princeton, NJ (1991). 

Properties Pale yel. to brnsh. yel. oil, si. char, odor and taste sol. in alcohol, ether, chloroform, carbon disulfide insol. in water dens. 0.924-0.929 vise. 50.09 cps vapor pressure very low m.p. 22-31 C iodine no. 120-141 sapon. no. 189-195 flash pt. 540 F ref. index 1.471 Toxicology May cause allergic reactions incl. hair damage and acne-like pimples TSCA listed Precaution Combustible... 

The commercial production of PCBs began in 1929, and today these compounds can be detected throughout the environment. Since PCBs are strongly hydrophobic, they tend to accumulate in the fatty tissues of humans and other animals. Chloracne, skin pigmentation, hair damage. 

Toxicoiogy May cause allergic reactions incl. hair damage and acne-like pimples TSCA listed... 

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