PAVA powder is a synthetic irritant chemically known as pelargonic acid vanillylamide (also called nonivamide). It is essentially a lab-made version of capsaicin, the compound that makes chili peppers hot. Most commonly encountered as the active ingredient in police incapacitant sprays, PAVA is designed to cause immediate, intense pain in the eyes, skin, and airways to temporarily disable a person.
Chemical Makeup and Origin
Though nonivamide does occur naturally in tiny amounts in certain chili peppers, virtually all PAVA used today is manufactured through chemical synthesis. That distinction matters. Natural pepper-based sprays (oleoresin capsicum, or OC) vary in potency depending on the pepper variety, growing conditions, harvest timing, and extraction method. Because PAVA is synthesized in a lab, its strength and composition are consistent from batch to batch, which is a major reason law enforcement agencies favor it.
How PAVA Affects the Body
PAVA activates the same heat-sensing receptors in your nerve endings that natural capsaicin does. These receptors normally respond to high temperatures, so triggering them chemically produces an overwhelming sensation of burning even though no actual heat is present. The effects hit within seconds of contact and target three systems at once.
In the eyes, PAVA causes severe pain, involuntary clamping shut of the eyelids, and heavy tearing. On the skin, it produces an intense burning sensation. When inhaled, it triggers coughing, choking, and difficulty breathing. Together, these reactions are enough to temporarily incapacitate most people.
At a cellular level, PAVA triggers oxidative stress and a strong inflammatory response. Lab studies on skin cell models show it increases production of inflammatory signaling molecules and, at higher concentrations or with prolonged exposure, can cause cell damage and cell death. These findings underscore why the compound is used only in very low concentrations and brief exposures in real-world applications.
How Long the Effects Last
The initial incapacitation from PAVA is more persistent than some other chemical irritants. The UK’s Committee on Toxicity notes that PAVA keeps the eyes shut and extremely painful for longer than CS gas (tear gas) before any recovery begins. Once recovery does start, however, it progresses quickly. Exposure to fresh, moving air typically brings significant relief within 15 to 20 minutes, though watery eyes can persist for hours afterward.
PAVA vs. OC (Pepper) Spray
The two most common police sprays are PAVA and OC, and people often confuse them. OC is extracted directly from hot peppers and contains a mix of natural capsaicinoids. Its potency can vary significantly between batches. PAVA, by contrast, is a single synthetic compound with a predictable effect profile every time.
Both work through the same receptor in the body, so the symptoms they produce are nearly identical: eye pain, skin burning, and respiratory distress. The practical difference for law enforcement is reliability. A canister of PAVA spray will perform the same way whether it was manufactured in January or July, which is harder to guarantee with plant-derived OC products.
Use by Police in the UK
PAVA spray is the standard incapacitant issued to police forces across the United Kingdom. The UK Home Office sets strict specifications: police PAVA sprays must contain a concentration of 0.3% PAVA by weight per volume, with tight manufacturing tolerances (no individual canister above 0.335% or below 0.265%). These controls exist to deliver a predictable, incapacitating effect while limiting the risk of serious injury.
Officers carry PAVA as a less-lethal option for situations where verbal commands have failed but lethal force is not justified. It is classified as a use-of-force tool, and its deployment is recorded and subject to review.
Legal Status for Civilians
In the UK, PAVA spray is a prohibited weapon under Section 5 of the Firearms Act 1968. The law covers any device “designed or adapted for the discharge of any noxious liquid, gas or other thing.” Possessing, purchasing, or acquiring such a device without written authority from the Secretary of State (in England and Wales) or Scottish Ministers (in Scotland) is a criminal offense. This applies regardless of the concentration or form, whether it is a commercial spray canister or loose powder.
The legal landscape varies in other countries. In some European nations and parts of the United States, pepper sprays containing capsaicinoids (including PAVA) are available for civilian self-defense under certain restrictions. If you are outside the UK, check your local laws before purchasing any product containing PAVA or similar compounds.
What to Do After Exposure
If you or someone near you is exposed to PAVA, the most effective first step is moving into fresh, open air. This alone brings noticeable relief within 15 to 20 minutes for most people. Avoid rubbing the affected areas, which can spread the compound and worsen symptoms.
For the eyes and face, washing with cool, clean running water should bring rapid relief. One important detail: if PAVA residue gets into eyebrows, hair, or a beard, it can reactivate the first time it contacts water afterward (for example, during a shower the next day). The effect will be milder than the initial exposure, but you can avoid it by keeping your eyes tightly shut and thoroughly rinsing the area.
Residue on your hands poses no risk to the skin itself, but avoid touching your face until you have washed your hands with soap and water. Contaminated clothing should be washed separately from other laundry using normal detergent. Surfaces can be cleaned with warm, soapy water. Notably, PAVA residue is difficult to remove with plain water alone, especially in enclosed spaces, which can lead to secondary irritation for anyone entering the area later.