As of February 28th, 2023, NLM will discontinue the Wireless Information System for Emergency Responders (WISER), the website (https://wiser.nlm.nih.gov) and WebWISER (https://webwiser.nlm.nih.gov), and the standalone applications for Windows PCs, iOS app, and Android app.
Other sources of Hazmat or Chemical, Biological, Radiological, Nuclear (CBRN) information are available with the following resources:
This WISER content is available in multiple languages.
Non-Human Toxicity Values
LD50 Rat dermal >/= 2000 mg/kg bw
European Chemicals Agency (ECHA); Registered Substances, 4-Methylpentan-2-one (CAS Number: 108-10-1) (EC Number: 203-550-1) (Last modified: January 22, 2018). Available from, as of February 21, 2018: <https://echa.europa.eu/>.
LD50 Mouse ip 590 mg/kg bw
WHO/International Programme on Chemical Safety; Environmental Health Criteria 117, Methyl Isobutyl Ketone (1990). Available from, as of February 20, 2018: <http://www.inchem.org/pages/ehc.html/>.