Educational content for trained professionals. Not a Safety Data Sheet, not medical advice. In an emergency, call your local poison control or emergency services immediately. Terms of use.
Chloroacetaldehyde
Also known as: CHLOROACETALDEHYDE · 2-chloroacetaldehyde · 107-20-0 · Chloroethanal
- CAS No.
- 107-20-0
- Formula
- C2H3ClO
- Molar mass
- 78.5 g/mol
- PubChem CID
- 33
Flammable
Corrosive
Toxic
Health hazard
Environmental hazard
Summary
Chloroacetaldehyde (C2H3ClO), CAS 107-20-0. Common in labs and industry. Read on for hazards, storage, PPE and mixing rules.
Background
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Physical properties
Sourced from PubChem Experimental Properties. Values may vary between sources and conditions.
Hazards
Ignites easily when exposed to a flame or spark.
Attacks skin, eyes and materials.
May be fatal even in small doses.
Serious long-term health effects (CMR, respiratory sensitizer).
Toxic to aquatic organisms.
Hazard statements
- H301: Toxic if swallowed [Danger Acute toxicity, oral]
- H311: Toxic in contact with skin [Danger Acute toxicity, dermal]
- H314: Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]
- H330: Fatal if inhaled [Danger Acute toxicity, inhalation]
- H351: Suspected of causing cancer [Warning Carcinogenicity]
- H400: Very toxic to aquatic life [Warning Hazardous to the aquatic environment, acute hazard]
- H226
- H227: Combustible liquid [Warning Flammable liquids]
- H310: Fatal in contact with skin [Danger Acute toxicity, dermal]
- H318: Causes serious eye damage [Danger Serious eye damage/eye irritation]
- H370: Causes damage to organs [Danger Specific target organ toxicity, single exposure]
- H373: May causes damage to organs through prolonged or repeated exposure [Warning Specific target organ toxicity, repeated exposure]
- H300: Fatal if swallowed [Danger Acute toxicity, oral]
- H371: May cause damage to organs [Warning Specific target organ toxicity, single exposure]
Storage
Keep at room temperature, below 30 °C, out of direct heat.
Store somewhere well-ventilated and away from any ignition source.
Metal drums or tinted glass, tightly sealed.
Strong acids, strong bases and powerful oxidizers.
Personal protective equipment
Nitrile or butyl, at least 0.4 mm thick.
Safety goggles with side shields.
A2 organic-vapor cartridge if the room isn't well ventilated.
Occupational exposure limits (HSE)
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EU harmonised classification (ECHA C&L)
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Transport
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FDA recalls & enforcement
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Compatibilities
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Open comparator with ChloroacetaldehydePractical safety notes
- Flammable. Keep away from open flames, hot surfaces and sparks. Ground containers when transferring.
- Corrosive. Wear chemical goggles, faceshield and chemical-resistant gloves. Have an eyewash within reach.
- Acute toxicity. Work under a fume hood, restrict access, keep a specific antidote plan available.
- Serious health hazard (carcinogen, mutagen, reprotoxic, respiratory sensitizer). Substitute if possible; otherwise closed systems and medical surveillance.
- Environmental hazard. Do not release to sewers or waterways; collect for hazardous waste disposal.
Derived from the GHS classification shown above. These notes are generic guidance and do not replace the manufacturer's SDS or your local risk assessment.
FAQ
Is Chloroacetaldehyde flammable?+
Yes. Chloroacetaldehyde (CAS 107-20-0) carries the GHS02 flame pictogram. Keep it away from ignition sources, use non-sparking tools, and ground metal containers when transferring liquid.
What PPE should I wear when handling Chloroacetaldehyde?+
Chemical-splash goggles and a faceshield, chemical-resistant gloves (nitrile or butyl) and an apron are the minimum. Work inside a fume hood or use a suitable respirator. Check SDS section 8 for material-specific breakthrough times.
How should Chloroacetaldehyde be stored?+
Store Chloroacetaldehyde (CAS 107-20-0) in tightly closed original containers, in a cool, dry, well-ventilated area away from incompatible materials. Use a flammable-liquid cabinet and keep away from oxidizers and heat. Segregate acids from bases and keep away from metals that can be attacked.
Is Chloroacetaldehyde dangerous for the environment?+
Yes. Chloroacetaldehyde carries the GHS09 environment pictogram. Do not release to drains, soil or waterways; collect residues for hazardous-waste disposal in line with local regulations.
Where can I find the official Safety Data Sheet for Chloroacetaldehyde?+
Official, up-to-date SDS documents are published by each manufacturer (Sigma-Aldrich, Merck, Thermo Fisher, VWR, Carl Roth, etc.) and by regulators such as ECHA and NIOSH. This page is an educational summary and does not replace the manufacturer's SDS.
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