Malononitrile CAS No.109-77-3

Malononitrile (CAS No. 109-77-3) 

1. Basic Information

Chemical Name: MalononitrileSynonyms: Propanedinitrile; Dicyanomethane; Malonic dinitrileCAS Number: 109-77-3Molecular Formula: C₃H₂N₂Molecular Weight: 66.06 g/molAppearance: White crystalline solidOdor: Odorless or faint aromatic odor

2. Physical and Chemical Properties

Melting Point: 32–34 °C (90–93 °F)Boiling Point: 220 °C (428 °F) (decomposes)Density: 1.19 g/cm³ (at 20 °C)Solubility:Water: 133 g/L (20 °C)Organic solvents: Soluble in ethanol, acetone, ether; slightly soluble in benzeneVapor Pressure: 0.1 mmHg at 20 °CFlash Point: 112 °C (234 °F) (closed cup)pKa: ~11 (weakly acidic)

3. Chemical Structure

     N≡C        |      CH₂        |       C≡N

4. Hazards (GHS Classification)

Acute Toxicity: Fatal if swallowed, inhaled, or in contact with skin (H300, H310, H330)Skin/Eye Irritation: Causes severe burns (H314)Sensitization: May cause allergic skin reaction (H317)Environmental Hazards: Toxic to aquatic life (H400)NFPA Rating: Health 3, Flammability 1, Reactivity 1

5. Storage and Handling

Storage: Store in a cool, dry, well-ventilated area away from oxidizers and acids. Keep container tightly sealed.Handling: Use PPE (nitrile gloves, goggles, respirator) and work under a fume hood. Avoid dust formation.

6. Applications

Pharmaceuticals: Intermediate for vitamins (e.g., B₁), antihypertensive drugs.Agrochemicals: Synthesis of pesticides and herbicides.Organic Synthesis: Precursor for heterocyclic compounds (e.g., pyrimidines).

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