Greta Jimenez
Bromoacetone, an organic compound, is a highly toxic chemical that was once used as a weapon during World War I. Due to its hazardous nature, it is listed as a substance that requires special handling procedures in the event of a spill or leak. While it is not explicitly mentioned in the provided lists of marine pollutants, its toxicity and potential environmental impact are concerning. Bromoacetone's presence in the essential oil of seaweed and its commercial availability raise questions about its potential effects on marine life and ecosystems. This prompts further investigation into whether bromoacetone should be classified as a marine pollutant.
| Characteristics | Values |
|---|---|
| Formula | CH3COCH2Br |
| Appearance | Colourless liquid |
| Other appearances | Impure samples appear yellow or brown |
| Uses | Chemical weapon in World War I |
| Uses | Reagent in organic synthesis |
| Toxicity | Yes |
| Decomposition | Decomposes on standing |
| Precaution | Isolate spill or leak area for at least 50 meters |
| Precaution | If tank, rail tank car or highway tank is involved in a fire, isolate for 800 meters |
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What You'll Learn
Bromoacetone's toxicity and use as a chemical weapon
Bromoacetone (CH3COCH2Br) is a colourless organic compound. It is a lachrymatory agent, meaning exposure to it can cause eye and skin irritation. It was used as a chemical weapon during World War I, referred to as BA by the British and B-Stoff (Weisskreuz) by the Germans.
Due to its toxicity, bromoacetone is no longer used as a riot control agent. The US Environmental Protection Agency (EPA) has prepared a Health and Environmental Effects Profile for Bromoacetone, which supports the listing of hazardous constituents of waste streams under the Resource Conservation and Recovery Act (RCRA). The EPA report also provides health-related limits for emergency actions under the Comprehensive Environmental Response, Compensation, and Liability Act (CERCLA).
The EPA report states that existing data is insufficient to determine an Acceptable Daily Intake (ADI) or a carcinogenic potency factor for bromoacetone. However, the Reportable Quantity (RQ) value of 1, 10, 100, 1000, or 5000 pounds is used to determine the quantity of the substance that requires notification in the event of a release.
Bromoacetone is commercially available and is used as a versatile reagent in organic synthesis. It is prepared by combining bromine and acetone with a catalytic acid. This process can result in over-bromination, leading to di- and tri-brominated products.
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Bromoacetone's presence in the essential oil of seaweed
Bromoacetone (CH3COCH2Br) is an organic compound that is a colourless liquid, although impure samples may appear yellow or brown. It was first described in the 19th century and has been used as a chemical weapon and in riot control due to its toxicity. Today, it is used as a reagent in organic synthesis.
Bromoacetone is present in the essential oil of the seaweed species Asparagopsis taxiformis, found near the Hawaiian Islands. It is present in very low quantities, making up less than 1% of the essential oil.
Asparagopsis taxiformis is a red seaweed species that has gained attention for its ability to reduce methane emissions from livestock. When included in small amounts in the feed of cattle and sheep, it can inhibit methanogenesis by up to 98%. This is significant because agricultural practices, particularly ruminant livestock farming, contribute a large proportion of global greenhouse gas emissions.
The presence of bromoacetone in the essential oil of seaweed is interesting from a scientific perspective, especially when considering the potential benefits and risks of using Asparagopsis taxiformis in livestock feed. However, it is important to note that bromoacetone itself is considered a hazardous substance, and its presence in the environment, including marine ecosystems, is regulated to ensure it does not reach harmful levels.
Overall, while bromoacetone is present in the essential oil of seaweed, specifically Asparagopsis taxiformis, its low concentration and the potential benefits of this seaweed in reducing methane emissions may outweigh any potential risks associated with its toxicity.
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Bromoacetone's commercial availability and synthesis
Bromoacetone is commercially available for purchase. It is sometimes stabilized with magnesium oxide. The compound was first described in the 19th century by N. Sokolowsky. Bromoacetone is an organic compound with the formula CH3COCH2Br. It is a colourless liquid, although impure samples may appear yellow or brown.
Bromoacetone is a versatile reagent in organic synthesis. It is prepared by combining bromine and acetone with a catalytic acid. As with all ketones, acetone enolizes in the presence of acids or bases. The alpha carbon then undergoes electrophilic substitution with bromine. This method, however, presents the main difficulty of over-bromination, resulting in di- and tribrominated products. If a base is present, bromoform is obtained instead, by the haloform reaction.
Bromoacetone is also naturally present in the essential oil of a seaweed called Asparagopsis taxiformis, found near the Hawaiian Islands. It is a lachrymatory agent and a precursor to other organic compounds.
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Bromoacetone's classification as a hazardous substance
Bromoacetone (CH3COCH2Br) is an organic compound that is a colourless liquid with a pungent odour. It is a lachrymatory agent, which means it can cause tearing and eye irritation. Bromoacetone is a toxic substance that was used as a chemical weapon during World War I. Due to its toxicity, it is no longer used as a riot control agent. However, it is still used as a reagent in organic synthesis.
The Health and Environmental Effects Profile for Bromoacetone, prepared by the US EPA, classifies it as a hazardous substance under the Resource Conservation and Recovery Act (RCRA). This classification is based on the potential human health, aquatic life, and environmental effects associated with bromoacetone. The data suggests that bromoacetone can cause ocular and respiratory irritation in humans, with an AEGL-1 value based on a concentration of 0.1 ppm that caused eye irritation.
The National Advisory Committee for Acute Exposure Guideline Levels for Hazardous Substances (NAC/AEGL Committee) has identified bromoacetone as a high-priority, acutely toxic chemical. The NAC/AEGL Committee develops AEGLs, which represent threshold exposure limits for the general public during emergency exposure periods ranging from 10 minutes to 8 hours. These exposure limits are based on the severity of toxic effects, with three levels: AEGL-1, AEGL-2, and AEGL-3.
When determining the appropriate shipping name and hazard class for bromoacetone, the presence of a plus sign (+) indicates that the substance poses a known risk to humans. This classification is important for the safe loading, transport, and storage of bromoacetone, particularly when it comes to restricting its transportation with foodstuffs, feed, or any other edible materials.
In summary, bromoacetone is classified as a hazardous substance due to its toxic nature and potential human health, aquatic life, and environmental impacts. Its classification is supported by various regulatory bodies and guidelines, such as the US EPA, RCRA, NAC/AEGL Committee, and HazMat Tool, which provide exposure limits and safety measures to mitigate the risks associated with this substance.
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Bromoacetone's flammability and low flash point
Bromoacetone (CH3COCH2Br) is a highly flammable liquid. Its flammability is such that it has been classed as a hazardous substance by the US Environmental Protection Agency (EPA). The EPA's Health and Environmental Effects Profile for Bromoacetone was prepared to support listings of hazardous constituents of waste streams under the Resource Conservation and Recovery Act (RCRA).
Bromoacetone is an organic compound that is a lachrymatory agent and a precursor to other organic compounds. It is a colourless liquid, although impure samples can appear yellow or brown. It has a variety of other names, including 2-Propanone, 1-bromo-; α-Bromoacetone; Acetonyl bromide; Acetylmethyl bromide; 1-Bromo-2-propanone; Bromomethyl methyl ketone; Bromo-2-propanone; B-Stoff; Martonite; Monobromoacetone; and Rcra waste number P017.
Due to its flammability, it is essential to eliminate all ignition sources when handling bromoacetone. This includes no smoking, flares, sparks, or flames in the immediate area. All equipment used when handling the product must be grounded, and it is imperative not to touch or walk through spilled material. If a leak occurs, it should be stopped if it can be done so without risk. In the event of a spill, it is crucial to prevent entry into waterways, sewers, basements, or confined areas. A vapor-suppressing foam may be used to reduce vapors.
For small spills, earth, sand, or other non-combustible materials can be used to absorb the liquid, which should then be transferred to containers for later disposal. Clean, non-sparking tools should be used to collect the absorbed material. In the case of a large spill, diking is necessary to contain the liquid for later disposal. While a water spray may reduce vapors, it may not prevent ignition in closed spaces.
The flammability and toxicity of bromoacetone have resulted in its historical use as a chemical weapon during World War I, where it was known as BA by the British and B-Stoff (Weisskreuz) by the Germans.
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Frequently asked questions
Bromoacetone is a toxic, flammable liquid that is considered a hazardous substance. It is not explicitly listed as a marine pollutant, but it is a known environmental hazard.
Bromoacetone is an organic compound with the formula CH3COCH2Br. It is a colourless liquid, although impure samples can appear yellow or brown. It was used as a chemical weapon in World War I.
Bromoacetone is a lachrymatory agent, meaning it can cause eye and respiratory irritation. It also has unknown health effects, as existing data is insufficient to determine an Acceptable Daily Intake (ADI) or a carcinogenic potency factor.
In the event of a spill or leak, the area should be isolated for at least 50 meters (150 feet) in all directions. If a tank containing bromoacetone is involved in a fire, the area should be isolated for 800 meters (1/2 mile) and evacuated.
