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The chemical synthesis of BHT in industry has involved the reaction of p-cresol (4-methylphenol) with isobutylene (2-methylpropene), catalyzed by sulfuric acid: [11] CH 3 (C 6 H 4)OH + 2 CH 2 =C(CH 3) 2 → ((CH 3) 3 C) 2 CH 3 C 6 H 2 OH. Alternatively, BHT has been prepared from 2,6-di-tert-butylphenol by hydroxymethylation or aminomethylation ...
Isobutylene (or 2-methylpropene) is a hydrocarbon with the chemical formula (CH 3) 2 C=CH 2. It is a four-carbon branched alkene (olefin), one of the four isomers of butylene . It is a colorless flammable gas, and is of considerable industrial value.
Pseudofolliculitis barbae (PFB) is a type of irritant folliculitis that commonly affects people who have curly or coarse facial hair. [1] It occurs when hair curls back into the skin after shaving, causing inflammation, redness, and bumps. [2] [3] This can lead to ingrown hairs, scarring, and skin discoloration. PFB can be treated with various ...
Blu Atlas Hair & Skin Gummies contain a unique blend of vitamins and minerals that are essential for healthy hair and skin. These include biotin, retinol, saw palmetto, zinc, folic acid, and a ...
To provide extra benefits for hair, skin and nails, this supplement contains a proprietary blend of ingredients, including MSM to lower inflammation in the body and strengthen keratin, l ...
AMPS is made by the Ritter reaction of acrylonitrile and isobutylene in the presence of sulfuric acid and water. [2] The recent patent literature [3] describes batch and continuous processes that produce AMPS in high purity (to 99.7%) and improved yield (up to 89%, based on isobutene) with the addition of liquid isobutene to an acrylonitrile / sulfuric acid / phosphoric acid mixture at 40°C.
UNSPOTTED 4X® Acid Jelly Night Serum. The "4X" in this serum's name is thanks to the 15 percent blend of lactic, azelaic, glycolic, and tranexamic acids, which together help reduce the appearance ...
A chemical depilatory is a cosmetic preparation used to remove hair from the skin. Common active ingredients are salts of thioglycolic acid and thiolactic acids. These compounds break the disulfide bonds in keratin and also hydrolyze the hair so that it is easily removed.