As protests proceed to unfold throughout Kenya, there’s a worrying routine response from safety forces, who usually resort to the usage of tear gasoline canisters to disperse crowds.
What is normally meant to be a short lived technique of crowd management has develop into a norm in Kenya, with the usage of tear gasoline changing into an all too acquainted sight, notably within the Nairobi CBD.
But what precisely is tear gasoline? How efficient is it, and does it pose any well being dangers? Studies have been completed on the identical, and a number of the findings are fairly extraordinary.
Despite the identify, ‘tear gasoline’ isn’t really a gasoline. Instead, it’s a pressurised powder that’s condensed inside canisters and disperses into the air when launched. The most typical type of tear gasoline is 2-chlorobenzalmalononitrile (CS gasoline), which was first found in 1959 by two American scientists. America quickly adopted CS gasoline because the go-to resolution to disperse riots.
A protester kicks a tear gasoline cannister throughout previous protests
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Facts East Africa
From the safety forces’ standpoint, the usage of tear gasoline to disperse crowds is kind of efficient for the reason that powder irritates the eyes, nostril, throat and lungs by triggering ache receptors within the physique known as TRPA1 and TRPV1.
Moments after the physique interacts with CS gasoline, the pure response is to retreat because it causes burning sensations, coughing, choking and at occasions, short-term blindness.
Despite its effectiveness in crowd management, the usage of tear gasoline carries potential long-term well being dangers to protesters, particularly these in Kenya, since deployment of the chemical goes past simply dispersing it.
Because law enforcement officials within the nation typically launch the canisters instantly into crowds at head or chest stage, tear gasoline canisters find yourself turning into projectile weapons in addition to a probably lethal chemical for inhalation.
According to specialists, whereas tear gasoline publicity has speedy and short-term unintended effects like itching, blurry imaginative and prescient and short-term burns, steady inhalation of CS gasoline over time can have way more devastating results.
Notably, as a result of inhaling tear gasoline could cause irritation to the nostril, throat and lungs, individuals who have pre-existing respiratory circumstances face the next threat of creating extreme signs, together with potential respiratory failure.
Further, long-term publicity to the chemical can result in issues comparable to blindness, nerve harm, haemorrhages and erosion of the cornea, which is the attention’s outermost layer and the attention’s first line of defence for its interior buildings.
According to Physicians for Human Rights, tear gasoline publicity can even result in hypertension on account of an elevated coronary heart charge. To folks with pre-existing coronary heart circumstances, which they might be unaware of, publicity to the chemical can result in cardiac arrest.
It can be value noting that excessive publicity to excessive concentrations of tear gasoline at one go or publicity in enclosed areas can even result in loss of life inside a really brief time.
Treatment: While there isn’t a antidote for tear gasoline, one of the simplest ways to cope with it’s to keep away from interplay with the chemical altogether. However, within the occasion one comes into contact with tear gasoline, remedy depends on managing particular person signs.
Experts advise folks to instantly transfer as far-off from the supply of the tear gasoline as potential to hunt contemporary air. Also, since tear gasoline isn’t technically a gasoline, the vapour from the canisters tends to settle to the bottom. It is due to this fact advisable to hunt greater floor as quickly as potential.
It can be advisable to take off garments which were uncovered to tear gasoline as quickly as potential and bathe with cleaning soap and water to get the vapour off the pores and skin.
A photograph collage of the scenes witnessed following a standoff between police and demonstrators on Kimathi Street, Nairobi on June 17, 2025.
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Screengrab/Bishar