The National Institute for Occupational Safety and Health (NIOSH) has released a mobile app version of its NIOSH Pocket Guide to Chemical Hazards (mNPG). The guide is a source of industrial-hygiene information on more than 600 chemicals that workers, employers, and occupational health professionals use widely. The app works on any mobile device with an HTML5-compliant web browser, and also, offline. The app allows the user to search chemicals by name, DOT number, CAS number, or RTECS number. To download the organization’s mobile apps, go to https://tinyurl.com/yd9gnky9.