Chlorine dioxide, or ClO2, is a chemical compound that is commonly used in pulp bleaching and water treatment processes. Because it is very unstable and can react violently, ClO2 poses a number of health hazards. Working with or around ClO2 is sometimes unavoidable however, so it is critical that you use the proper PPE, follow standard procedures, and know how to handle leaks, spills, and other emergency situations.
DVD-R and progressive playback compatibility required. Check the manual for your player to determine if it supports both DVD-R Media and progressive playback. Playing the DVD on a computer requires a DVD ROM drive and DVD playback software, such as PowerDVD or VLC Media Player (Free).
DVDs ? Playable media products
Extremely cost-effective, efficient, and portable
Simple, flexible, and reusable format
No need for Internet connectivity
Playable 24/7 in any U.S. DVD player or computer
Cannot be updated electronically with new content
Cannot automatically track individual viewing time
Requires manual grading and recordkeeping for paper tests