Trichloroacetyl chloride CAS No.76-02-8

Trichloroacetyl Chloride (CAS No. 76-02-8) 

1. Basic Information

Chemical Name: Trichloroacetyl chlorideSynonyms: TCAC; Trichloroethanoyl chlorideCAS Number: 76-02-8Molecular Formula: C₂Cl₄OMolecular Weight: 181.83 g/molAppearance: Colorless to pale yellow fuming liquidOdor: Pungent, suffocating odor (similar to hydrochloric acid)Odor Threshold: <1 ppm

2. Physical and Chemical Properties

Melting Point: -57°C (-71°F)Boiling Point: 118°C (244°F)Density: 1.62 g/cm³ at 20°CRefractive Index: 1.459 at 20°CSolubility:Reacts violently with water/alcoholsSoluble in ether, benzene, chloroformVapor Pressure: 15 mmHg at 20°CFlash Point: Non-flammable (but reacts violently with water)

3. Chemical Structure

     Cl        |  Cl-C-CO-Cl        |       Cl

4. Hazards (GHS Classification)

Corrosivity:Causes severe skin burns (H314)Causes serious eye damage (H318)Acute Toxicity:Fatal if inhaled (H330)Toxic if swallowed (H301)Environmental Hazards:Very toxic to aquatic life (H400)NFPA Rating: Health 4, Flammability 0, Reactivity 2

5. Storage and Handling

Storage:Store in sealed glass/PTFE containers under dry inert gas (N₂/Ar)Keep away from moisture, heat, and basesHandling:Use full-face respirator with acid gas filtersWear acid-resistant gloves (Viton®/neoprene)Work in a fume hood with sash at ≤18 inches

6. Applications

Chemical Synthesis: Production of herbicides (e.g., Trichloroacetic acid derivatives)Pharmaceuticals: Intermediate for hypnotic drugsDye Manufacturing: Chlorination agent for organic compounds

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