Molecular Formula:C₁₀H₉N      
Molar mass:143.1852g/mol
Structure of 7-Methylquinoline(612-60-2):
                
Synonyms of 7-Methylquinoline(612-60-2):7-Nitro-1,3-dihydro-2H-indol-2-one;7-Nitro-1,3-dihydroindol-2-one
Density:1.076 g/cm³                  
Flash Point:104.4 °C                                
Boiling Point:254.5 °C at 760 mmHg            
Index of Refraction:1.624                            
Vapour Pressure:0.0275 mmHg at 25°C                
Melting point:35-37 °C   
Water solubility:<0.1 g/100 mL at 20 oC
Appearance:white to light yellow crystal powder

Carcinogenicity of 7-Methylquinoline(612-60-2) hasn't been listed as a carcinogen by  NTP, IARC,ACGIH, or CA Prop 65.And its toxicological properties have not been fully investigated.You can see actual entry in RTECS for complete information,either.

Hazard Codes:Xi
Risk Statements:
37:  Irritating to the respiratory system
38:  Irritating to the skin
41:  Risk of serious damage to eyes
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice
39:  Wear eye/face protection

Polymerization of the 7-Methylquinoline(612-60-2) is stable under normal temperature and pressure conditions,and you must not take it with strong oxidizing agents and strong acids.And also prevent it to broken down into hazardous decomposition products: oxides of nitrogen,carbon dioxide,carbon monoxide.