What molecule am I?
Methylisothiazolinone, along with other isothiazolinones, is a biocide widely used as a preservative in personal care products. It is also used in many industrial processes, such as paint and paper manufacturing, metalworking, mining, and sanitizing.
Because methylisothiazolinone is a strong cytotoxin, its use is under fire because of its dangers to humans and the environment. It is especially problematic when it is added to products such as lotions that remain on the skin.
In recent years, the European Union has begun to crack down on potentially hazardous preservatives in cosmetics. In particular, earlier this year, the combination of methylisothiazolinone and methylchloroisothiazolinone was restricted, and the use of methylisothiazolinone by itself is scheduled to be banned in 2017.
The EU’s extensive restrictions have severely reduced the number of preservatives allowed for use in personal care products. And bans on animal testing for cosmetics make it unlikely that new biocides will be available in the foreseeable future.
Learn more about this molecule from CAS, the most authoritative and comprehensive source for chemical information.
Molecule of the Week needs your suggestions!
If your favorite molecule is not in our archive, please send us a message. The molecule can be notable for its current or historical importance or for any quirky reason. Thank you!
Stay Ahead of the Chemistry Curve
Learn how ACS can help you stay ahead in the world of chemistry.