Will not work
Crashes as soon as I open it
Not usable
Anytime I try to log in to the app, it just crashes on my iPad Pro. Tried deleting and reinstalling.
Unusable
Crashes any time you attempt to use any feature on latest iPad Pro
Free
About
This tool offers decision support for first responders in hazardous chemical environments. It provides detailed information on thousands of chemicals, PPE recommendations, and emergency response guidance. Access is restricted to authorized personnel.
✓Chemical information database
✓PPE recommendations
✓Hazardous concentration levels
✓Isolation and protective action distances
✓Emergency Medical Information
✓Chemical identification tools
✓Decision support tools
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What's New in Chem Companion
5.0.3
April 27, 2026
Critical performance fixes for chemical comparer, SCBA tool, and user feedback. Additional software improvements, organizational licensing, and data synchronization with chemicalcompanion.org.
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FAQ
What is ERDSS?
ERDSS is a chemical companion app that provides decision support for first responders in hazardous chemical environments. It offers detailed information on chemicals, personal protective equipment, and emergency response guidance.
Is ERDSS free to use?
Yes, ERDSS is provided free-of-charge to authorized military, law enforcement, and fire departments. Registration is required at https://chemicalcompanion.org.
What devices does ERDSS support?
ERDSS currently supports iPads. It is not available on other devices like iPhones or Android phones.
How often is ERDSS updated?
The latest version of ERDSS is 4.08.06, last updated on March 9, 2022. Updates provide new information and features to assist users.
What kind of information does ERDSS provide on chemicals?
ERDSS contains detailed information on over 3000 common chemicals, including synonyms, hazardous concentration levels, exposure guidelines, and emergency medical information.
Can ERDSS help identify unknown chemicals?
Yes, ERDSS includes tools to help identify unknown chemicals using their physical properties or observed exposure symptoms.
What is the age rating for ERDSS?
ERDSS has an age rating of 12+. This indicates the content is generally suitable for users aged 12 and older.
Does ERDSS have ads?
No, ERDSS does not contain advertisements. It is a free tool designed for professional use without commercial interruptions.
