Riot control agent


Riot control agent

Riot control agents are less-lethal lachrymatory agents used for riot control. Most commonly used riot control agents are pepper spray and various kinds of tear gas.

These chemicals disperse a crowd that could be protesting, in a riot, or to clear a building. They can rapidly produce sensory irritation or disabling physical effects which usually disappear within 15 minutes (for tear gas) and up to 2 hours (for pepper spray) following termination of exposure. They can also be used for chemical warfare defense training, although their use in warfare itself is a violation of Article I.5 of the Chemical Weapons Convention. Article II.9 of the CWC specifically authorizes their use for civilian law enforcement [ [http://www.opcw.org/html/db/cwc/eng/cwc_article_II.html 9. "Purposes Not Prohibited Under this Convention" means] ] ] .

Substances

Two lachrymatory agents most commonly used for riot control are pepper spray and various kinds of tear gas.

Pepper spray

The active ingredient in pepper spray is capsaicin, which is a chemical derived from the fruit of plants in the Capsicum genus, including chiles. A synthetic analogue of capsaicin, pelargonic acid vanillylamide (desmethyldihydrocapsaicin), is used in another version of pepper spray known as PAVA spray which is used in England. Another synthetic counterpart of pepper spray, pelargonic acid morpholide, was developed and is widely used in Russia. Its effectiveness compared to natural pepper spray is unclear and it has caused some injuries.

Pepper spray typically comes in canisters, which are often small enough to be carried or concealed in a pocket or purse. Pepper spray can also be bought concealed in items such as rings. There are also pepper spray projectiles available, which can be fired from a paintball gun. Having been used for years against demonstrators [ http://www.babybloc.org/writings.html Use on infants ] , it is increasingly being used by police in routine interventions. [http://www.youtube.com/watch?v=GsIBkRJGQEw Use on infants ]

Tear gas

Tear gas is a non-specific term for any chemical that is used to cause temporary incapacitation through irritation of eyes and/or respiratory system. It is used as a hand-held spray or can be fired in canisters that heat up spewing out a 'gas' cloud at a steady rate. Technically, these clouds are aerosols, and not true gases. [http://www.bbc.co.uk/dna/h2g2/A655517] [http://www.eco-action.org/dod/no7/cs_gas.html] [http://www.google.co.uk/search?sourceid=navclient&aq=t&ie=UTF-8&rlz=1T4GGLJ_enGB226GB226&q=cs+gas+effects]

Popular tear gases include the eye irritants ortho-chlorobenzylidene-malononitrile (CS gas), chloroacetophenone (CN gas), and dibenz (b,f)-1,4-oxazepine (CR gas). Among a long list of substances, these three have become of greater importance than the others because of their effectiveness and low risks when used. Today, CS has largely replaced CN as the most widely used tear gas internationally. Fact|date=March 2008

Decontamination

At room temperature, these tear gases are white solid substances. They are stable when heated and have low vapor pressure. Consequently, they are generally dispersed as aerosols. All of them have low solubility in water but can be dissolved in several organic solvents. Hydrolysis of CN is very slow in water solution, also when alkali is added. CS is rapidly hydrolyzed in water solution (half-life at pH 7 is about 15 min. at room temperature) and extremely rapid when alkali is added (half-life at pH 9 is about 1 min.). CR is hydrolyzed only to a negligible extent in water solution.

CN and CR are, thus, difficult to decompose under practical conditions, whereas CS can easily be inactivated by means of a water solution. Skin is suitably decontaminated by thorough washing with soap and water. CS is then decomposed whereas CN and CR are only removed.

Decontamination of material after contamination with CS can be done with a 5-10 % soda solution or 2 % alkaline solution. If this type of decontamination cannot be accomplished (e.g., contaminated rooms and furniture), then the only other means is by intensive air exchange—preferably with hot air.

Exposed streets and sidewalks will have toxicFact|date=January 2008 and irritating CS powder that will be stirred into the air by traffic and pedestrians long after the cloud has dissipated, and should be washed away with water.

In contrast to human beings, domesticated animals generally have low sensitivity to tear gases. Dogs and horses can therefore be used by police for riot control even when tear gas is used.Fact|date=September 2007

Dispensing large quantities

Backpack dispensers for riot control agents, when the intent is to use a larger quantity than possible with grenades, are one type of device used by organizations that might, for example, need to cover a prison yard [ [http://www.sunshine-project.org/incapacitants/jnlwdpdf/cbdcomblows.pdf Commercial Backpack Blower / Sprayer System] ,US Army CBDCOM,June 1998.] Dispensers are also made for attachment to helicopters; see CBU-19 [ [http://www.airforcehistory.hq.af.mil/EARS/tailwnd.htm Operation TAILWIND Review Extract of U.S Air Force Report] ,Air Force Historical Office, July 1998] .

ee also

*Pepper spray
*CS gas
*CN gas
*Use of poison gas in World War I
* Review about Pharmacology, Toxicology, Biochemistry and Chemistry of several riot control agents:

External links

* [http://www.fas.org/nuke/guide/usa/doctrine/army/mmcch/RiotAgnt.htm Riot Agents]

References


Wikimedia Foundation. 2010.

Look at other dictionaries:

  • riot control agent — masinių neramumų malšinimo cheminė medžiaga statusas T sritis Gynyba apibrėžtis Medžiaga, laikinai sudirginanti ar sukelianti fizinį silpnumą, kuris praeina po keleto minučių pasitraukus iš jos poveikio vietos. Ilgalaikio sužalojimo rizika… …   NATO terminų aiškinamasis žodynas

  • riot control agent — masinių neramumų malšinimo cheminė medžiaga statusas T sritis apsauga nuo naikinimo priemonių apibrėžtis Medžiaga, sukelianti laikiną dirginantį ar žalojantį fizinį poveikį, kuris išnyksta per minutes, kai pasibaigia jos naudojimas. Ji nesukelia… …   Apsaugos nuo naikinimo priemonių enciklopedinis žodynas

  • riot control agent — The employment of riot control agents and/or special tactics, formations, and equipment in the control of violent disorders …   Military dictionary

  • Riot control — Rank of Icelandic National Police officers in full riot gear during the 2008 Icelandic lorry driver protests Riot control refers to the measures used by police, military, or other security forces to control, disperse, and arrest civilians who are …   Wikipedia

  • Riot gun — In the USA riot gun may also mean a riot shotgun. A US model M 32 6 shot 40 mm launcher, which can be used as a grenade launcher or riot gun depending on the ammunition used …   Wikipedia

  • Agent — An agent is either: * an entity who is capable of action * someone (or something) who acts on behalf of another person.In law* Agent (law): a person authorised to act on behalf of another person ** Patent agent, or patent attorney, a professional …   Wikipedia

  • agent antiémeutes — masinių neramumų malšinimo cheminė medžiaga statusas T sritis Gynyba apibrėžtis Medžiaga, laikinai sudirginanti ar sukelianti fizinį silpnumą, kuris praeina po keleto minučių pasitraukus iš jos poveikio vietos. Ilgalaikio sužalojimo rizika… …   NATO terminų aiškinamasis žodynas

  • riot agent — noun A chemical substance such as tear gas used to control or disperse rioters • • • Main Entry: ↑riot …   Useful english dictionary

  • Agent 51 — Infobox musical artist Name = Agent 51 Img capt = Img size = Background = group or band Origin = flagicon|USA San Diego, California Genre = Punk rock Rock Rock Roll Years active = 1995 ndash;2005 Label = Suburban Hooligans Records Adeline Records …   Wikipedia

  • Moscow hostage crisis chemical agent — Main article: Moscow theater hostage crisis This article forms part of the series Chemical agents Lethal agents Blood agents Cyanogen chloride (CK) …   Wikipedia


Share the article and excerpts

Direct link
Do a right-click on the link above
and select “Copy Link”

We are using cookies for the best presentation of our site. Continuing to use this site, you agree with this.