A ca4 file extension is related to the STABCAL and used for its data files.
There is one other file type using
the CA4 file extension!
.ca4 - Delphi installation data
CA4 file extension - STABCAL data
What is ca4 file? How to open ca4 files?
File type specification:
The ca4 file extension is associated with the STABCAL (stability calculation for aqueous systems) developed by Dr. Huang of the Montana Tech Metallurgical Engineering faculty.
The ca4 file stores various data used for internal purposes of the STABCAL.