MF: C₁₆H₂₄N₂O
MW: 260.37
EINECS: 216-079-4
Density: 1.08 g/cm³ 
Flash Point: 215 °C  
Index of Refraction: 1.558 
Enthalpy of Vaporization: 71.41 kJ/mol 
Vapour Pressure: 4.59E-08 mmHg at 25°C 
Melting Point of Oxymetazoline (1491-59-4): 182 °C
Boiling Pointof Oxymetazoline (1491-59-4): 431.9 °C at 760 mmHg 
IUPAC Name: 6-Tert-butyl-3-(4,5-dihydro-1H-imidazol-2-ylmethyl)-2,4-dimethylphenol
Synonyms: Oxymetazoline ; 2-(4-Tt-butyl-2,6-dimethyl-3-hydroxybenzyl)-2-imidazoline ; 3-[(4,5-Dihydro-1H-imidazol-2-yl)methyl]-6-(1,1-dimethylethyl)-2,4-dimethylphenol ; 6-Tbutyl-3-(2-imidazolin-2-ylmethyl)-2,4-dimethyl-pheno ; 6-TButyl-3-(2-imidazolin-2-ylmethyl)-2,4-dimethylphenol ; 6-Trt-butyl-3-(2-imidazolin-2-ylmethyl)-2,4-dimethyl-pheno ; 6-Trt-Butyl-3-(2-imidazolin-2-ylmethyl)-2,4-dimethylphenol ; 6-Trt-Butyl-3-(4,5-dihydro-1H-imidazol-2-ylmethyl)-2,4-dimethylphenol
Following is the molecular structure of Oxymetazoline (1491-59-4):

 

Poison by ingestion and subcutaneous routes. Experimental reproductive effects. When heated to decomposition it emits toxic fumes of NO_x.