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benzoic acid ester, C 6 H 5 COO(CH 2) 11-14 CH 3 (commonly found in products that are fade resistant and water/sweat resistant) allantoin: N-(2,5-dioxo-4-imidazolidinyl)urea stops bleeding of cuts from shaving [citation needed] alpha-isomethyl ionone: 3-methyl-4-(2,6,6-trimethylcyclohex-2-enyl)but-3-en-2-one fragrance ingredient [6] aluminium ...
Dimethoxytrityl, often abbreviated DMT, is a protecting group widely used for protection of the 5'-hydroxy group in nucleosides, particularly in oligonucleotide synthesis. [ 1 ] It is usually bound to a molecule, but can exist as a stable cation in solution, where it appears bright orange.
DMT can also be made by a different route, namely direct esterification of terephthalic acid with methanol. The dimethyl terephthalate that is formed is then purified by distillation. Even terephthalic acid of low purity may be used in this method. C 8 H 6 O 4 + 2CH 3 OH → C 10 H 10 O 4 + 2 H 2 O. in the presence of o-xylene at 250–300 °C.
Includes: Shampoo, conditioner and serum | Key ingredients: Proprietary blend of extracts, essential oils, biotin | Best for: Progressed thinning The award-winning Nioxin System 2 is more than ...
Ethylene glycol protects a ketone (as an acetal) during an ester reduction, vs. unprotected reduction to a diol. A protecting group or protective group is introduced into a molecule by chemical modification of a functional group to obtain chemoselectivity in a subsequent chemical reaction.
2 HSCH 2 CO 2 H (thioglycolic acid) + R-S-S-R → HO 2 CCH 2-S-S-CH 2 CO 2 H (dithiodiglycolic acid) + 2 RSH . Chemical depilatories contain 5–6% calcium thioglycolate in a cream base (to avoid runoff). Calcium hydroxide or strontium hydroxide maintain a pH of about 12. Hair destruction requires about 10 minutes.
One type operates on the same general principle as lye relaxers but uses a slightly weaker alkaline agent, such as potassium hydroxide, lithium hydroxide, or guanidine hydroxide. The last of these is not pre-formulated, but rather is generated at the time of use by combining a cream containing calcium hydroxide (slaked lime) with an "activating ...
Drain cleaners usually contain a strong base such as sodium hydroxide that decomposes hair and converts fats into water-soluble products. The reaction is exothermic, releasing heat to soften the fats. Drain cleaners can also contain aluminum, which reacts with sodium hydroxide to produce bubbles of hydrogen gas that help to break up the clog. [11]