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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:

CHEMM (Chemical Hazards Emergency Medical Management) - HHS ASPR
REMM (Radiation Emergency Medical Management) - HHS ASPR
ERG2020 (Emergency Response Guidebook) - USDOT/PHMSA [search for ERG2020 in the App Stores]
CAMEO Chemicals - NOAA/EPA
NIOSH Pocket Guide to Chemical Hazards - CDC/NIOSH [search for NIOSH Mobile Pocket Guide in the App Stores]
Agency for Toxic Substances and Disease Registry (ATSDR) website - CDC/ATSDR
DHS's Hazardous Materials Release website - DHS
PubChem - NIH/NLM
The National Library of Medicine Data Distribution (data files for HSDB, ChemIDplus, etc.) - NIH/NLM

If you have questions or suggestions, please contact NLM Customer Service (https://support.nlm.nih.gov/support/create-case).

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Chemical weapons precursors

Total: 58

	2-Chloroethanol			Name
	2-Methylcyclohexanone			Name
	Acetic Acid			Name
	Acetic Anhydride			Name
	Acetone			Name
	Allyl Chloride			Name
	Ammonia			Name
	Ammonium Nitrate			Name
	Arsenic Trichloride			Name
	Benzaldehyde			Name
	Benzene			Name
	Benzyl Chloride			Name
	Carbon tetrachloride			Name
	Chloroform			Name
	Chlorotrifluoromethane			Name
	d-methamphetamine			Name
	Dichlorodifluoromethane			Name
	Diethyl Ether			Name
	Diisopropylamine			Name
	Dimethylamine			Name
	Diphosgene			Name
	Ethylamine			Name
	Fourth Generation Agents			Name
	Gasoline			Name
	Hydrogen Chloride			Name
	Hydrogen fluoride			Name
	Hydrogen peroxide			Name
	Iodine, Elemental			Name
	Isopropanol			Name
	Lithium, Elemental			Name
	Methanol			Name
	Methyl Ethyl Ketone			Name
	Methyl isobutyl ketone			Name
	Methylamine			Name
	Naphtha			Name
	Oleum			Name
	Phosphine			Name
	Phosphoric Acid			Name
	Phosphorus Oxychloride			Name
	Phosphorus Trichloride			Name
	Phosphorus, Elemental			Name
	Pinacolyl Alcohol			Name
	Piperidine			Name
	Potassium Cyanide			Name
	Potassium Fluoride			Name
	Potassium Permanganate			Name
	Propionic Anhydride			Name
	Sodium Cyanide			Name
	Sodium Fluoride			Name
	Sodium Hydroxide			Name

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