Chemical Agent Identification Sets (CAIS), known by several other names, were sets of glass vials or bottles that contained small amounts of chemical agents. They were employed by all branches of the United States Armed Forces from 1928-1969 for the purpose of training in detection, handling and familiarization with chemical warfare. Most CAIS were destroyed in the 1980s but the U.S. Army Chemical Materials Agency still occasionally demilitarizes CAIS that are found buried.
Throughout the military's use of CAIS they were known by several different common names aside from Chemical Agent Identification Sets. The other names were: Toxic Gas Sets, Chemical Agent Identification Training Sets, Instructional War Gas Identification Sets, Detonation War Gas Identification Sets, and Instructional Gas Identification Replacement Sets. [1]
CAIS were used by all branches of the United States military for training in detection, handling and familiarization with chemical warfare agents between the 1930s and 1960s. [1] [2] The U.S. Army used CAIS to train its soldiers from 1928 until 1969. [2] During this time period more than 100,000 CAIS units were produced by all branches of the military. [1] CAIS were declared obsolete in 1971 and systematically recalled from military installations during two operations. [2] The first recall operation, Operation Set Consolidation I (SETCON I), was in 1978; SETCON II followed on in 1980. [2]
Chemical Agent Identification Sets were small glass vials, ampules or bottles which contained small amounts of chemical warfare agents or industrial chemicals. [1] Each set contained more than two dozen glass ampules, each ampule contained about 100 milliliters of chemical agent. [2] There were three subsets of CAIS, distributed in 18 different set configurations. [2] These subsets included bottles of sulfur mustard used to purposely contaminate equipment or terrain for decontamination training. [3] Another type of CAIS were known as "sniff sets" and were used to train soldiers to recognize the color and odor of chemical agents. [1] Used indoors, the sniff sets contained agent-impregnated charcoal and agent simulants; they contained very little actual chemical warfare agent. [1]
Each of the CAIS held between one and five different chemical agents. [2] The agents used in CAIS were phosgene, adamsite, lewisite, cyanogen chloride, chloroacetophenone, sarin, nitrogen mustard, sulfur mustard and chloropicrin. [4] In addition, triphosgene, a phosgene simulant, and ethyl malonate, a tabun simulant were also used. [4] Sarin was the only nerve agent used in CAIS. [4]
Following the recall operations of the late 1970s and early 1980s, 21,400 CAIS were sent to Rocky Mountain Arsenal where they were destroyed by incineration. [2] [5] The destroyed CAIS represented the entire stockpile then in storage. [5] This initial disposal took place from May–October 1979 and again from May 1981-December 1982. [2]
Though the stockpile of CAIS were destroyed decades ago, there remained the problem of what to do with CAIS found buried underground. Most of the other 80,000 or so CAIS were used during training but some were disposed of, the primary method of disposal was burial. [1] The U.S. Army Chemical Materials Agency was assigned the task of destroying CAIS as they were found, usually through ongoing construction projects. [6] Most parts of the CAIS can be disposed of as hazardous waste, but the concentrated mustard agent must be neutralized before it is shipped. The Single CAIS Access and Neutralization System (SCANS) is a handheld container for safely mixing the mustard agent with a neutralizing agent. [7]
Mustard gas or sulfur mustard is any of several chemical compounds that contain the chemical structure S(CH2CH2Cl)2. In the wider sense, compounds with the substituent S(CH2CH2X)2 and N(CH2CH2X)3 are known as sulfur mustards and nitrogen mustards, respectively, where X = Cl or Br. Such compounds are potent alkylating agents, which can interfere with several biological processes. Also known as mustard agents, this family of compounds are infamous cytotoxins and blister agents with a long history of use as chemical weapons. The name mustard gas is technically incorrect: the substances, when dispersed, are often not gases but a fine mist of liquid droplets. Sulfur mustards are viscous liquids at room temperature and have an odor resembling mustard plants, garlic, or horseradish, hence the name. When pure, they are colorless, but when used in impure forms, such as in warfare, they are usually yellow-brown. Mustard gases form blisters on exposed skin and in the lungs, often resulting in prolonged illness ending in death. The typical mustard gas is the organosulfur compound bis(2-chloroethyl) sulfide.
Chemical warfare (CW) involves using the toxic properties of chemical substances as weapons. This type of warfare is distinct from nuclear warfare, biological warfare and radiological warfare, which together make up CBRN, the military acronym for chemical, biological, radiological, and nuclear, all of which are considered "weapons of mass destruction" (WMDs), a term that contrasts with conventional weapons.
The use of toxic chemicals as weapons dates back thousands of years, but the first large-scale use of chemical weapons was during World War I. They were primarily used to demoralize, injure, and kill entrenched defenders, against whom the indiscriminate and generally very slow-moving or static nature of gas clouds would be most effective. The types of weapons employed ranged from disabling chemicals, such as tear gas, to lethal agents like phosgene, chlorine, and mustard gas. This chemical warfare was a major component of the first global war and first total war of the 20th century. The killing capacity of gas was limited, with about 90,000 fatalities from a total of 1.3 million casualties caused by gas attacks. Gas was unlike most other weapons of the period because it was possible to develop countermeasures, such as gas masks. In the later stages of the war, as the use of gas increased, its overall effectiveness diminished. The widespread use of these agents of chemical warfare, and wartime advances in the composition of high explosives, gave rise to an occasionally expressed view of World War I as "the chemist's war" and also the era where weapons of mass destruction were created.
The United States is known to have possessed three types of weapons of mass destruction: nuclear weapons, chemical weapons, and biological weapons. The U.S. is the only country to have used nuclear weapons on another country, when it detonated two atomic bombs over two Japanese cities of Hiroshima and Nagasaki during World War II. It had secretly developed the earliest form of the atomic weapon during the 1940s under the title "Manhattan Project". The United States pioneered the development of both the nuclear fission and hydrogen bombs. It was the world's first and only nuclear power for four years, from 1945 until 1949, when the Soviet Union produced its own nuclear weapon. The United States has the second-largest number of nuclear weapons in the world, after the Russian Federation.
Many nations continue to research and/or stockpile chemical weapon agents despite numerous efforts to reduce or eliminate them. Most states have joined the Chemical Weapons Convention (CWC), which required the destruction of all chemical weapons by 2012. Twelve nations have declared chemical weapons production facilities and six nations have declared stockpiles of chemical weapons. All of the declared production facilities have been destroyed or converted to civilian use after the treaty went into force.
The Edgewood Chemical Activity was a U.S. Army site located in Edgewood, Maryland that stored chemical weapons. Its construction was started by Ordnance Corps in November 1917 and completed in less than a year. The arsenal was to employ about 10,000 civilian and military personnel in fabrication of chemical weapons and filling gas shells with phosgene, chlorpicrin, chlorine and mustard gas. Since 1941, the U.S. Army stored approximately five percent of the nation's original chemical agent in steel ton containers, at the Edgewood Area of Aberdeen Proving Ground.
The Tooele Chemical Agent Disposal Facility or TOCDF, is a U.S. Army facility located at Deseret Chemical Depot in Tooele County, Utah that was used for dismantling chemical weapons.
The United States Army Chemical Materials Activity (CMA) is a separate reporting activity of the United States Army Materiel Command (AMC). Its role is to enhance national security by securely storing the remaining U.S. chemical warfare materiel stockpiles, while protecting the work force, the public and the environment to the maximum extent.
The Deseret Chemical Depot was a U.S. Army chemical weapon storage area located in Utah, 60 miles (100 km) southwest of Salt Lake City. It is related to the Tooele Chemical Agent Disposal Facility.
The Pueblo Chemical Depot is a chemical weapons storage site located in Pueblo County, Colorado, United States. The Pueblo Chemical Depot was one of the last two sites in the United States with chemical munitions and chemical material. The Pueblo Chemical Agent Destruction Pilot Plant (PCAPP) which is under the Program Executive Office, Assembled Chemical Weapons Alternatives program destroyed its stockpile of 155mm and 105mm artillery shells and 4.2-inch mortars, all of which contained a form of the chemical agent mustard gas.
Blue Grass Army Depot (BGAD) is a U.S. Army Joint Munitions Command storage facility for conventional munitions and chemical weapons. The facility is located in east central Kentucky, southeast of the cities of Lexington and Richmond, Kentucky. The 14,494-acre (58.66 km2) site, composed mainly of open fields and wooded areas, is used for munitions storage, repair of general supplies, and the disposal of munitions. The installation is used for the storage of conventional explosive munitions as well as assembled chemical weapons. The depot primarily is involved in industrial and related activities associated with the storage and maintenance of conventional and chemical munitions.
The Pine Bluff Arsenal is a United States Army installation in Jefferson County, Arkansas, about eight miles northwest of Pine Bluff and thirty miles southeast of Little Rock.
The Blue Grass Chemical Agent-Destruction Pilot Plant (BGCAPP) is a facility built to destroy the chemical weapons stockpile at the Blue Grass Army Depot (BGAD), near Richmond, Kentucky.
Johnston Atoll Chemical Agent Disposal System (JACADS) was the U.S. Army's first chemical munitions disposal facility. It was located on Johnston Island, at Johnston Atoll and completed its mission and ceased operation in 2000.
The last chemical weapon in the U.S. stockpile was destroyed July 7, 2023, at the Blue Grass Chemical Agent-Destruction Pilot Plant.
The Pueblo Chemical Agent-Destruction Pilot Plant (PCAPP) is a chemical weapons destruction facility built to destroy the chemical weapons stockpile formerly stored at the U.S. Army Pueblo Chemical Depot (PCD) in southeastern Colorado. The stockpile originally contained 2,613 U.S. tons of mustard agent in 155mm projectiles, 105mm projectiles and 4.2-inch mortar rounds. The weapons had been stored at the 23,000-acre depot since the 1950s.
Throughout history, chemical weapons have been used as strategic weaponry to devastate the enemy in times of war. After the mass destruction created by WWI and WWII, chemical weapons have been considered to be inhumane by most nations, and governments and organizations have undertaken to locate and destroy existing chemical weapons. However, not all nations have been willing to cooperate with disclosing or demilitarizing their inventory of chemical weapons. Since the start of the worldwide efforts to destroy all existing chemical weapons, some nations and terrorist organizations have used and threatened the use of chemical weapons to leverage their position. Examples of the use of chemical weapons since World War II are Iraq’s Saddam Hussein on the Kurdish village Halabja in 1988 and their employment against civilian passengers of the Tokyo subway by Aum Shinrikyo in 1995. The efforts made by the United States and other chemical weapon destruction agencies intend to prevent such use, but this is a difficult and ongoing effort. Aside from the difficulties of cooperation and locating chemical weapons, the methods to destroy the weapons and to do this safely are also a challenge.
A chemical weapon (CW) is a specialized munition that uses chemicals formulated to inflict death or harm on humans. According to the Organisation for the Prohibition of Chemical Weapons (OPCW), this can be any chemical compound intended as a weapon "or its precursor that can cause death, injury, temporary incapacitation or sensory irritation through its chemical action. Munitions or other delivery devices designed to deliver chemical weapons, whether filled or unfilled, are also considered weapons themselves."
The United States chemical weapons program began in 1917 during World War I with the creation of the U.S. Army's Gas Service Section and ended 73 years later in 1990 with the country's practical adoption of the Chemical Weapons Convention. Destruction of stockpiled chemical weapons began in 1986 and was completed on July 7, 2023. The U.S. Army Medical Research Institute of Chemical Defense (USAMRICD), at Aberdeen Proving Ground, Maryland, continues to operate.
