This site uses cookies to enhance your user experience. By continuing to use this site you are agreeing to our COOKIE POLICY. If you have an ACS member number, please enter it here so we can link this account to your membership. (optional) ACS values your privacy. By submitting your information, you are gaining access to C&EN and subscribing to our weekly newsletter. We use the information you provide to make your reading experience better, and we will never sell your data to third party members. A shortage of a precursor almost exclusively sourced from China is threatening supplies of the widely used preservative benzisothiazolinone (BIT). Users of BIT face regulatory headaches and increased costs as they seek alternatives for the preservative, which prevents bacteria, yeast, and fungal growth in a host of consumer products, including paints, adhesives, and household cleaners. Sounding the alert is the Household & Commercial Products Association (HCPA), a trade group, which recently sent an advisory telling members that a BIT precursor, o-nitrochlorobenzene, is in short supply because of Chinese government actions. BIT makers have already told customers they won’t be ab...