Here is some useful information on how to determine the relative hotness of the pepper spray. For years the general hotness rating was called the Scoville heat unit or SHU. This is common measure of hotness of anything. A habanero pepper, for example, has a SHU of 500,000. Sounds like a lot doesn’t it? That is one of the hottest peppers going. But the least amount of SHU’s in any pepper spray is 2 million. Some like the Fox Pepper Sprays are up in the 5.3 million SHU range making them on this scale the hottest pepper spray around.
Sabre Pepper Sprays claim to have the hottest because they have 1.33% Major Capcaicinoids or MC in some of their sprays and .67% in others. Most pepper sprays are in the .18% MC range.
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