COBALT BLUE GLASS FILTER 2" x 2" For use in Sodium Flame Testing
- Optical Filter in the Sodium Flame Test to filter out the yellow flame caused by the contamination of sodium.
- Expands the ability to see violet and blue hues.
- Used in Science Olympiad Forensics.
- Used in other chemistry experiments that filter out sodium and potassium.
Caution: Glass Products can have sharp edges