CAS Registry Number

CAS 766-98-3 — 1-Ethynyl-4-fluorobenzene

1-Ethynyl-4-fluorobenzene is an aromatic alkyne compound featuring a fluorine substituent at the para position, widely used in organic synthesis, pharmaceutical intermediates, and materials science for its reactivity in cross-coupling reactions and polymer chemistry. It appears as a colorless to pale yellow liquid or solid with a characteristic ethynyl odor. Key specifications include a CAS number of 766-98-3, molecular formula C8H5F, and molecular weight of 120.1237 g/mol. It is stable under ambient storage conditions with no signal word classification. Molekula supplies 1-Ethynyl-4-fluorobenzene from research to bulk quantities with full documentation and ISO 9001:2015 traceability.