Hexachloroacetone
Chemical Name: 1,1,1,3,3,3-Hexachloro-2-propanone
Synonyms: HCA; Perchloroacetone; Hexachloropropanone
CAS Number: 116-16-5
Molecular Formula: C₃Cl₆O (or Cl₃C-CO-CCl₃)
Molecular Weight: 264.75 g/mol
Physical and Chemical Properties
Appearance: Colorless to pale yellow liquid
Odor: Pungent, sweetish (similar to chloroform)
Melting Point: –2 °C (28 °F)
Boiling Point: 204–205 °C (399–401 °F)
Density: 1.74 g/cm³ (at 20 °C)
Vapor Pressure: ~0.3 mmHg (at 20 °C)
Solubility:Slightly soluble in water (decomposes slowly).Soluble in organic solvents (ethanol, ether, benzene).
Chemical Properties
Reactivity:Reacts with strong bases, reducing agents, and metals.Releases toxic gases (e.g.,
phosgene,
hydrogen chloride) upon decomposition.
Stability: Stable under normal conditions but hydrolyzes in water/alkaline solutions.
Hazard and Safety Information (GHS)
Hazard Symbols:
T (Toxic),
N (Environmental Hazard),
Xi (Irritant)
Hazard Statements:
H301: Toxic if swallowed.
H311: Toxic in contact with skin.
H315: Causes skin irritation.
H319: Causes serious eye irritation.
H335: May cause respiratory irritation.
H411: Toxic to aquatic life with long-lasting effects.
Precautionary Measures:
P261: Avoid breathing dust/fume/gas.
P273: Avoid release to the environment.
P280: Wear gloves/protective clothing/eye protection.
Storage & Handling
Store in a
cool, dry, ventilated area in tightly sealed containers.Keep away from
heat, sparks, and open flames (non-flammable but decomposes at high temps).Use
chemical-resistant gloves (neoprene, nitrile) and
fume hood for handling.
Applications
Intermediate in pesticide/herbicide synthesis (e.g.,
alachlor).Organic synthesis (chlorination agent).Formerly used as a
lacrimator (tear gas).
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