I found this interesting article about the strength of OC Pepper Spray, this comes directly from the blog at SafetyTechnology.org.  Lots of great information below and more on their site.

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The first thing for you to understand about wholesale pepper spray products is what makes them effective. Most manufacturers use Scoville Heat Units (SHU) to indicate the strength of their spray. However, when you buy raw pepper you can buy it at any SHU you want.

For instance, one competitor says his spray use 5.3 million SHU of Oleoresin Capsicum (OC) resin. Read further and he states he has a 2% formula.  That means that his pepper product’s formula has 2% X 5.3 million or 106,000 SHU.

Another states, “We add a small amount of pure capsaicin (which is well over 5,000,000 SHU) to boost our CHR to over 230,000.” If you do the math (230,000/5,000,000) you get 4.6% of OC in their formula.

Continue reading How Effective is Pepper Spray?