CAS Registry Number

CAS 9003-53-6 — Polystyrene, M.W. ca 100,000

Polystyrene is a synthetic aromatic polymer made from the monomer styrene, widely used in packaging, insulation, and disposable cutlery due to its lightweight, rigid, and insulating properties. This high-molecular-weight variant (M.W. ~100,000) is particularly valued for its durability and clarity in applications like CD cases, laboratory equipment, and protective foam. While its molecular formula is often misstated as C₈H₁₅N₃ (incorrect for polystyrene), the accurate formula is (C₈H₈)ₙ. Key details: CAS 9003-53-6, stable at ambient storage, no signal word required. Molekula supplies polystyrene from research to bulk quantities with full documentation and ISO 9001:2015 traceability.