Downloading, Installing, and Running the Chemical Reactivity Worksheet

The latest version of the Chemical Reactivity Worksheet (CRW) is 3.0.1, which was posted on March 22, 2013. Follow these instructions for downloading, installing, and running the CRW.

Warning symbol Warning:  Two major bugs have been identified in Chemical Reactivity Worksheet 3.0.
Users of the Chemical Reactivity Worksheet (CRW) version 3.0 should be aware that two major bugs have been identified in the software:
  1. The Mixture Report does not consistently represent the hazard statements correctly on the Compatibility Charts created by the user for each mixture. For compounds included in the three groups “dienes,” “acrylates,” or “polymerizable compounds,” no hazard statement is provided to advise that these are self-reactive chemicals.

    In some cases, spurious hazard statements are provided, which may occur for compounds that are strong oxidizers. These incorrect statements only occur in cases where the chemical is virtually mixed with itself (in other words, along the diagonal of the Compatibility Chart). The Compatibility Chart that is generated correctly represents the chemical’s known compatibility issues—it is the resulting Mixture Report that has the flaws. Users can edit the Mixture Reports, so it is important to inspect them carefully and make appropriate changes.

  2. When a user adds or deletes chemicals in a mixture, any edits (changes to predicted hazards) made by the user will be lost. The Compatibility Chart for the modified mixture will revert back to its original hazard predictions when chemicals are added to or deleted from a mixture. This requires the user to re-enter all of the changes previously made to a mixture.

Fixes for these bugs will be incorporated in the next CRW (version 4) that is expected to be released later in 2015.

Downloading the CRW

Download the appropriate version of the Chemical Reactivity Worksheet (CRW):

Installing and Running the CRW

On a Windows PC:

Once you have downloaded the installation program, double-click on the "CRW301_Installer.exe" file icon, and then follow the directions you'll see on your screen.

To start the CRW, open the Start menu, point to Programs, and then click "CRW3." Follow the directions on your screen to learn how to use it.

On a Mac:

The CRW has been compressed as a zip file so that it can be downloaded more easily from the Internet. You should see a folder callled "CRW3" on your desktop once the program is uncompressed. [Need help with compressed files?]

To start the CRW, open the CRW folder, and then double-click the CRW3 application. [Seeing an "unidentified developer" message?] Follow the directions on your screen to learn how to use it.

On an iPad:

  1. Make sure you have the FileMaker Go database app installed on your iPad.
  2. Start iTunes, then connect your iPad with the USB cable to a Windows or Mac computer.
  3. Go to the Apps tab for your iPad in iTunes and select FileMaker Go.
  4. Click on the "Add…" button, then find and select the "CRW3.cr3" file.
  5. iTunes window on an iPad, showing the CRW3.cr3 file as a FileMaker Go document.

  6. When file transfer is complete, disconnect your iPad, start the FileMaker Go app, and select the "CRW3.cr3" file to start using CRW3 on the iPad.
  7. FileMaker Go window, showing the CRW3.cr3 file in the section, Files on Device.

Notes for iPad users:

  • Help files are not supported for the iPad version, so this version is most appropriate for experienced CRW users.
  • The iPad version does not allow Excel data exports.
  • Data entered on a Windows PC or a Mac can be used interchangeably between platforms. For example, a facility that creates mixtures, adds custom chemicals, etc. can copy the PC or Mac runtime file containing all of their customized work to the iPad version and have all of that work available there.

Questions: Contact us with questions, comments, or suggestions about the Chemical Reactivity Worksheet.