CAMEO Chemicals

CAMEO Chemicals is a database of hazardous chemical datasheets that emergency responders and planners can use to get response recommendations and predict hazards—such as explosions or toxic fumes. It is part of the CAMEO® software suite, developed jointly by NOAA and the Environmental Protection Agency (EPA).

CAMEO Chemicals is available for free in multiple formats. The mobile app and desktop program formats can be run offline, so that you don’t have to rely on an internet connection to get your response information. When you're online, you'll also have access to links to the NIOSH Pocket Guides and the International Chemical Safety Cards.

Online Versions

The main site is and the mobile site is

App for Tablets and Mobile Phones

Desktop Program for Windows and Mac

The Windows version can be run on Windows 7, 8.1, and 10 operating systems. The Macintosh version can be run on Mountain Lion (10.8), Mavericks (10.9), Yosemite (10.10), and El Capitan (10.11) operating systems. Other operating systems have not been tested and are not supported.

Note: Older Mac versions of CAMEO Chemicals will not be able to use the auto-update feature within the program to upgrade to the 2.7 version. Those users should delete their old CAMEO Chemicals program, and then manually download and install the new Mac version using the link above.

Part of the chlorine chemical datasheet, showing placards, hazard labels, and identification numbers.
Part of the chlorine chemical datasheet, showing placards, hazard labels, and identification numbers.

Comparing CAMEO Chemicals Formats

CAMEO Chemicals is available as a website, mobile website, mobile app, and desktop program. All of those formats use the same database, so the content is the same (see the development history for details about released versions).

Most of the program functionality is the same across CAMEO Chemicals formats as well, although there are a few key differences:

  • The mobile website has more limited functionality, and it doesn't include some functions like the advanced search, printing reports, and importing/exporting to MyChemicals.
  • The mobile app includes a type-ahead search feature, but it doesn't include the advanced search or importing to MyChemicals.
  • The desktop program can share information with other programs in the CAMEO software suite.
  • The mobile app and desktop program formats can be used offline.

How CAMEO Chemicals Works

Search through the extensive chemical database in CAMEO Chemicals to find datasheets with critical response information, including physical properties, health hazards, information about air and water hazards, and recommendations for firefighting, first aid, and spill response.

Additional datasheets based on UN/NA identification numbers provide response information from the Emergency Response Guidebook (ERG) and shipping information from the Hazmat Table (49 CFR 172.101). On the UN/NA datasheets, ERG Response Guide PDFs are available in English, Spanish, and French.

You can also make a collection of chemicals, and then use the chemical reactivity tool to predict what hazards could arise if the chemicals were to mix together.

More Information about CAMEO Chemicals


Questions: Contact us with questions, comments, or suggestions about CAMEO Chemicals.