Brazilian hair straightening is a semi-permanent hair straightening method done by temporarily sealing a liquid solution consisting of formaldehyde or a formaldehyde derivative and a preservative solution into the hair with a hair iron.
The technique has many variations and is known by several other names and brands, including Brazilian Blowout, Breezilian straightening, Brazilian Keratin Treatment, BKT, and Keratin Cure.[1] It is called Escova Progressiva in Brazil and Alisado brasileiro in Portugal.
The original formulation included formaldehyde H 2CO or methylene glycol H 2C(OH) 2. The two products readily interconvert, and coexist in chemical equilibrium, when dissolved in water or body fluids. Since formaldehyde is a known health hazard, the compositions have been banned in several countries including Canada[2] and the European Union.[3] It is still performed in the United States, though there are regulations and have been controversies regarding the treatment.[4]
^kibria, Abdul (2022-02-23). "How A Keratin Treatment Can Change Your Hair". GK Hair USA. Retrieved 2022-08-17.
^"Brazilian Blowout Solution Contains Formaldehyde". Health Canada. October 7, 2010. Archived from the original on October 11, 2010.
^"Rapid Alert System for non-food consumer products (RAPEX)". EUROPA. Archived from the original on December 13, 2007.
^"moomod". moomod.
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