2.1
2018-12-05
Jayla's mod: clear the screen when the UN/NA number is invalid.
2.0
2018-11-02
A UN/NA number is sometimes a class of transported substances. When available the app now lists some of the chemicals in the class.
1.9
2018-09-18
Fixed some keyboard input bugs, and updated the databases. Preparing for a Siri interface.
1.4
2018-02-28
This app now uses a custom numeric keypad which shows only the digits with available information. The new keypad moves out of the way and may be restored by tapping the numbers field.
ChesHaz now keeps a list of your substance queries in the app, which may be reviewed, edited, emailed, or cleared.
Some layout issues and bugs were fixed.
1.1
2018-02-10
Layout bug fixes and iPhone X support.
More information displayed, and clear links to external official web pages.