Malononitrile CAS 109-77-3

Introduction to Malononitrile

Malononitrile is a low-molecular-weight dinitrile compound with two cyano groups bonded to a central methylene carbon. The activated methylene structure supports a wide range of condensation and nucleophilic addition reactions. It appears as a colorless to pale yellow liquid at room temperature, with a faint characteristic odor. It dissolves in water, alcohols, ethers and most polar organic solvents.

Industrial production uses optimized cyanation processes with final distillation purification. The compound serves as a versatile C3 building block in organic synthesis, with particularly high reactivity in Knoevenagel condensation and cyclization reactions.

Malononitrile Chemical & Physical Properties

Applications of Malononitrile

Pharmaceutical synthesis intermediates: Used as a key precursor for manufacturing vitamin B1, barbiturate drugs and antimalarial agents. It participates in cyclization and condensation reactions to form heterocyclic pharmaceutical structures.

Dye and pigment manufacturing: Serves as a raw material for phthalocyanine dyes, fluorescent brighteners and disperse dyes. It contributes to conjugated chromophore structures with good color fastness and brightness.

Agrochemical intermediates: Acts as a building block for herbicide and fungicide active ingredients. The dinitrile structure forms the basis for heterocyclic crop protection compounds with target-specific biological activity.

Polymer and industrial additives: Functions as a crosslinking modifier for epoxy and acrylic resins. It also acts as a complexing agent in metal plating processes and a stabilizer for specialty polymer systems.

Storage & Safety Precautions for Malononitrile

• Store in tightly sealed containers in cool, dry, well-ventilated warehouses. Keep away from heat sources, open flame and strong oxidizers. The material is combustible and releases toxic fumes when heated to decomposition.
• Handle as a toxic material. Wear chemical splash goggles, nitrile gloves and full protective clothing during bulk transfer. Avoid inhalation of vapors and direct skin contact; the compound can be absorbed through intact skin.
• Keep separated from strong acids, bases and reducing agents. Contact with reactive chemicals may trigger violent reactions and release of toxic cyanide-containing gases.

Malononitrile FAQ

Q: What is Malononitrile (CAS 109-77-3) mainly used for?

A: It serves as a building block for pharmaceuticals, dyes, agrochemicals and polymer additives via condensation and addition reactions.

Q: What storage conditions apply to Malononitrile?

A: Store sealed in cool dry ventilated areas. Keep away from heat, flame and reactive chemicals to prevent decomposition and hazard.

Q: Is Malononitrile hazardous to handle?

A: Yes, it is toxic and combustible. Wear full chemical PPE and avoid skin absorption and vapor inhalation during handling.