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        Q: How can I prepare 200 ppm formaldehyde solution from 37 percent formaldehyde solution?
A: put 20 grams NaOH in a glass beaker and mix it with 180 ml of water swirl it gently and you get 10 percent sodium hydroxide solution . 

Q: How much is a gold keratin hair treatment in Saudia Arabia?
A: They are not permanent , that 's $ 300 - $ 500 every time you get them done . One I responded , she ha hers are doing in March and that was May when she posted it ? It is 1 millions dollar business , and they do not give money back guaranteeing for harmed hair or hair loss due to 'abuse ' , in such cases , , cancer .  Hair straighteners is well known as hair relaxers , keratin treatments and hair-smoothing products . They work by breaking and reforming the chemical bonds in keratin , which is the main protein that gives shape to each hair .   & gt ; & gt ; & gt ; & gt ; BRAZILIAN BLOWOUT HAD BEEN BANNED by the Food & amp ; Drug Adm. Sept. twelve , 2011 .   Google keratin treatment warnings . About 1,980,000 outcome ( 0.17 seconds ) & nbsp ;  & nbsp ;  Past users of the product have complains about sore throat , skin annoyance , headachess , chest pain and rashes , amongst other symptoms . That may have one thing to linked to the fact that the tiers of formaldehyde found in the product competitor those usually utilized in funereal embalming . That ’ s lots of formaldehyde .  Reps for the company swear it ’ s all a misapprehension . And the product labels himself “ no formaldehyde ” and “ formaldehyde free. ” The company has till September twelve to get its matters of order , or danger having its product seized by the FDA . “ We have been tested innumerable times by OSHA , ” the company ’ s CEO Mike Brady told NPR . “ And we 've never surpassed a standards of safety ever. ” Right now , these people are battling with the FDA , but continues its to be granted what clients want , . Buyer beware !  Hair-straightening products are able to contain little concentrations of formaldehyde ( 0.2 % ) . But various hair-straightening solutions have were identified to contain well above the permissible limit . For example , one popular hair-straightening product that advertised himself as “ formaldehyde-free ” actually contained 6.8 % to 11.8 % formaldehyde .   BTW : A various types of hair-straightening products utilized in professional salons can expose both hairstylists and their customers to formaldehyde . The outcome demonstrated that three professional hair-smoothing treatments labeled `` formaldehyde free '' can produce the carcinogenic chemical at concentrations above the occupational exposure limiting established by the Occupational Safety and Health Administration . They tested four products : Coppola Keratin Complex Blonde Formula , Global Keratin Juvexin Optimized Functional Keratin , La Brasiliana Escluso Keratin Treatment with Collagen , and Brazilian Blowout Acai Professional Smoothing Solution . While ChemRisk tested four popular brands of hair straighteners , there exist hundreds in the marketplace . Nov. 11-11   By contrast , beauty salon proprietor and stylists usually lack a scientific backdrop and have n't got the a keen awareness-raising of the danger of co-operation with products that contain formaldehyde , experts say .   Chemicals can enter the body through the skin .   Sources :  Google FDA.gov & amp ; searching for Hair Dye & amp ; Relaxers .  Google : Hair Dye FAQ 's Are Hair Dyes Safe ?