I realize that this has grown in popularity in the U.S. so a lot of ppl have been using this. However, pls do be careful since it still experimental and not approved by the FDA. Note that the formaldehyde-free versions contain ether (from what I've read). You may not smell it but it doesn't mean you're not inhaling it so pls use the necessary precautions.
Formaldehyde vs ether isn't much different in my book in regards to potential toxicity... I've noticed people posting that formaldehyde is present in a lot of other products. Yes that is true but not at the levels in BKT. A number of ladies on the forum seem to avoid the parabens and hydantoin... the preservatives that can potentially form formaldehyde in products and those are at much, much lower concentrations.
ETA: my last words to anyone interested
I agree with you about being careful but I do not agree with the bolded after research. I'm sure that SOME of the levels aren't as high, however there are products in our everyday life that are way higher on a DAILY basis then what's in .2 percent BKT (if you choose the.2). I'll post that below for you to see how much formaldehyde is in our every day life. It's at way more than .2 percent that's for sure. It may horrify you but here goes...
http://www.cfsan.fda.gov/~dms/cos-nail.html
The concentration of formaldehyde needed for nail hardening is higher than 0.2%....Nail hardeners that contain formaldehyde may cause an irritation or allergic reaction to those sensitized to this compound.
Sound familiar? Formaldehyde in general can cause problems for those sensitive to it. You've probably already determined that by developing allergies and asthma as this world is not as safe as we think it is.
Here's more and this is a doozy:
http://www.oeconline.org/our-work/kidshealth/toxics/air/formaldehyde
Formaldehyde occurs naturally, but is also produced in the laboratory for use in consumer products. In fact it is ranked in the top 25 among the 50 highest volume chemicals in the United States [2]. Formaldehyde is used in the production of paper, plywood, particle board and adhesives. It has a wide range of additional uses – from household products such as antiseptics, medicines and cosmetics to food preservatives, pesticides and as an agent in tobacco products. In addition, automobile exhaust, diesel and airplane engines, incinerators, and chemical smog all release formaldehyde into our air [2].
People are exposed to formaldehyde primarily by breathing air contaminated by the products and sources mentioned above. For example, furniture constructed from pressed composite wood products like plywood gives off formaldehyde gas for up to five years after being manufactured. People are exposed during and after applying certain paints, floor finishes, household cleaners and carpet glue. People may also be exposed to formaldehyde by wearing cosmetics (some, like nail polish, can emit high levels of formaldehyde when wet) and by wearing certain fabrics like wrinkle-free clothing that is produced with formaldehyde-generating resins.
In addition the effects are cumulative. Not just a one time thing, an assault on the system from more than one product at a time. If for instance you're wearing nail polish, going outside in air that inevitably contains formaldehyde in the smog, and then you go to your home with your household cleaners and your clothes you are breathing in formaldehyde and it's cumulative!
Here's that five percent thing This article says of nail hardeners:
http://www.cosmeticsinfo.org/HBI/18
Contains no more than 5% Formaldehyde
Five percent! The hair is just .2 and heck you're getting over the amount that's placed on the hair for a brief time DAILY just through your nail hardener. That's not to mention everything else if you don't use that (I don't like nail polish so that's one down for me but still there's other stuff that can't be avoided like breathing).
http://www.care2.com/news/member/451276626/1068772
Formaldehyde
Found in eye shadows, mascaras, other cosmetics, and in high percentages (up to 10%) in nail hardeners, it is widely used as a preservative, germicide and fungicide. It has recently been reclassified by the International Agency for Research on Cancer to its highest toxic class as a "known human carcinogen". May be listed on labels as formalin or methyl aldehyde, but is also hidden in many chemical combinations. It can cause allergic reactions, headaches, and chronic fatigue.
In its liquid state, formaldehyde, present in the ingredients DMDM hydantoin, diazolidinyl urea, and quaternium-15, can be absorbed through the skin and nails. As a volatile organic compound, or VOC, formaldehyde evaporates when the product is wet; levels drop sharply once it's dry. Consumer concern has led many manufacturers to remove it from their nail polishes. Quaternium-15 causes more dermatitis complaints than any other preservative, according to the American Academy of Dermatology. Bronopol, often listed as 2-bromo-2-nitropropane-1, 3-diol, can contribute to the formation of cancer-causing nitrosamines, according to the FDA. It can also break down to produce formaldehyde.
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If I had to think about all the craziness in this world I'd just hide in my room...but wait. That would contain formaldehyde in the building materials so what's a girl to do lol!
I think people should review all the info to make an informed decision. I was on your side until I stopped and thought about it and started doing some research. I read those articles and thought oh my goodness not that! Why would they put formaldehyde in there? Why do they put it in lots of stuff?
We are exposed to more than that on a daily basis and aren't dropping like flies. Common sense is necessary to make sure the rooms are ventilated but really, we aren't taking on a risk we aren't every single day just by going outside...or staying in, sadly. I do realize that we should take precautions but we're talking a bk once every 3-5 months. To me that's exposure twice a year as I plan to go every 5 months if I do it. This is not a scare tactic. I just want to explain the reality of the world we live in. I'm organic girl. I eat all natural, w/ no extra chems, pesticides but I know when I go outside I'm breathing in air filled w/ toxins. We do what we can to reduce the risk. I think that if I use it, I'll make sure to have good ventilation, and go to one that has a machine that absorbs all the odors, gasses, and toxins anyways like the one posted in another bk thread. Too much is bad, we all know that, but we know that those in professions involving formaldehyde just make sure to take precautions but continue to work around it and are alive and kicking.
In closing here's another article but it's form UK our U.S standards are similar. It talks about shampoo and antimicrobial hand soaps, shampoos, shower gels and stuff are sometimes at four times the recommended amount (of formaldehyde). Now in the article she's demanding saftely limits and stuff but it's hard to regulate the air you're breathing unless we just get rid of cars as we know it, and planes all together as they also emit formaldehyde per the government link I displaye above. But her account of the shampoo helps you to know how far this whole formaldehyde thing goes.
http://shananarocks.wordpress.com/2008/05/07/why-is-it-formaldehyde-increasingly-found-in-shampoos/
But these warnings are not required on shampoo, shower gel or family bubble bath, all of which can legally contain four times as much
formaldehyde.