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Chemical Defense

What about a Ultraviolet (UV) dye in pepper spray?

Some manufacturers claim to have a UV dye in their spray that will glow under a UV light making it easier for police to identify the attacker. UV dyes are a marketing gimmick. Most products claiming to have a UV dye have no UV dye at all. Pepper sprays contain caretinoids, the red pigment in red pepper extract. This is what certain companies are referring to as their "dye." The presence of UV dye may render a pepper spray less stable thereby shortening its shelf life.

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