Styrene Acrylonitrile, Styrene Acrylo Nitrile, Styrene Acrylonitrile Copolymer, SAN, 9003-54-7

Styrene Acrylonitrile, Styrene Acrylo Nitrile, Styrene Acrylonitrile Copolymer, SAN, 9003-54-7

Styrene Acrylonitrile (SAN) is a transparent and heat-resistant thermoplastic copolymer produced by the free radical polymerization of styrene and acrylonitrile. The relative composition typically ranges from 60 to 80% styrene and 20 to 40% acrylonitrile by weight2.

Physical Properties:

• Color: Transparent

• Density: 1.04-1.08 g/cm³

• Melting Point: Varies depending on the composition

• Boiling Point: Not applicable (thermoplastic)

• Solubility in Water: Insoluble

• Odor: Mild, characteristic

Chemical Properties:

• Molecular Formula: (C8H8)x(C3H3N)y

• Molecular Weight: Varies depending on the composition

• CAS Number: 9003-54-7

Applications:

• Household Items: Dishwasher-safe containers, disposable lighters, brush bristles

• Automotive: Instrument covers, reflectors

• Cosmetics: Cosmetic cases

• Medical: Medical syringes

• Electronics: Battery cases, refrigerator doors

SAN combines the clarity and rigidity of polystyrene with the toughness and strength of polyacrylonitrile. Compared to polystyrene, SAN offers much better chemical and solvent resistance, improved heat stability, enhanced mechanical properties, and slightly higher heat deflection temperature2.

Other Names:

• Styrene-acrylonitrile copolymer

• SAN

• 9003-54-7 (CAS number)

These names are used interchangeably in various industries and applications.