4-Methyl-5-vinyl thiazole Appearance: Yellow to deep reddish amber clear liquid Odor: Musty nutty root vegetable cocoa Assay (GC): ≥97% Specific gravity @ 25°C: 1.089 ~ 1.099 Refractive index @ 20°C: 1.561 ~ 1.568 Boiling point (°C): 173 ~ 174 Flash point (°C): 71 Heavy Metals (as Pb): 10ppm max. As: 3ppm max. 4-Methyl-5-vinylthiazole Identification Name 4-Methyl-5-vinylthiazole Synonyms Vinyl sulfurol; 4-Methyl-5-vinyl thiazole Molecular Structure Molecular Formula C6H7NS Molecular Weight 125.19 CAS Registry Number 1759-28-0 EINECS 217-160-4 FEMA 3313 Properties Density 1.09 Melting point -15 ºC Boiling point 66 ºC (10 torr) Refractive index 1.561-1.568