This is a Python script to massively gather information about exposure limits and physical properties from different publicly-available sources:

In order to use this code you need the following requirements:

1. Google Chrome installed in your computer. However, you can modify the code and use other selenium driver (e.g., Firefox)
2. A .csv with a column named as CAS NUMBER (except for the OSHA database)
3. Install:
   • selenium (https://pypi.org/project/selenium/)
   • webdriver_manager (https://pypi.org/project/webdriver-manager/)
   • pandas (https://pypi.org/project/pandas/)
   • regex (https://pypi.org/project/regex/)
   • argparse (https://pypi.org/project/argparse/)
   • pyyaml (https://pyyaml.org/wiki/PyYAMLDocumentation)

To run the code from the Linux/Ubuntu terminal or Windows CMD:

1. You must move to the folder where is main.py
2. Run the following command:

   python main.py Option -FR file_path_to_read_CAS -FS file_path_to_save_infomartion

The inputs accompanying the flags represent:

• file_path_to_read_CAS: path of the file where you have the CAS numbers for searching (except for OSHA database).
• file_path_to_save_infomartion: path of the file where you will save the information.

The positional argument Option has the following values currently:

• A: for running osha_scraper.py.
• B: for running cameo_scraper.py.
• C: for running comptox_scraper.py.
• D: for running nist_scraper.py.
• E: for running ifa_scraper.py

Additionally, you can use each scraper separately, for example:

   python cameo_scraper.py -FR file_path_to_read_CAS -FS file_path_to_save_infomartion