Molecular Formula: C₈H₁₂N₂
Molar mass: 136.1943 g/mol
Density: 0.964 g/cm³
Flash Point: 69.4 °C
Index of Refraction: 1.501
Boiling Point: 180.5 °C at 760 mmHg
Vapour Pressure: 1.21 mmHg at 25°C
Product categories: Flavors and Fragrances;pyrazine Flavor;Alphabetical Listings
Structure of 2-Ethyl-3,5-dimethylpyrazine (55031-15-7):
       
Systematic Name: 3-Ethyl-2,5-dimethyl-pyrazine 
SMILES: n1cc(nc(c1C)CC)C 
InChI: InChI=1/C8H12N2/c1-4-8-7(3)9-5-6(2)10-8/h5H,4H2,1-3H3 
InChIKey: WHMWOHBXYIZFPF-UHFFFAOYAZ 
Std. InChI: InChI=1S/C8H12N2/c1-4-8-7(3)9-5-6(2)10-8/h5H,4H2,1-3H3 
Std. InChIKey: WHMWOHBXYIZFPF-UHFFFAOYSA-N

Carcinogenicity of 2-Ethyl-3,5-dimethylpyrazine (55031-15-7) hasn't been listed as a carcinogen by NTP, IARC,ACGIH, or CA Prop 65.

Hazard Codes: Xn
Risk Statements:
22:  Harmful if swallowed 
36:  Irritating to the eyes
37:  Irritating to the respiratory system
38:  Irritating to the skin
Safety Statements:
26:  In case of contact with eyes, rinse immediately with plenty of water and seek medical advice

  2-Ethyl-3,5-dimethylpyrazine (55031-15-7) also can be called Pyrazine, 3-ethyl-2,5-dimethyl- ; 2-ethyl-3,6-dimethylpyrazine ; and 2-ethyl-3,-dimethylpyrazine .It is hazardous,so the first aid measures and others should be known.Such as: When on the skin: should  flush skin with plenty of water immediatelyfor at least 15 minutes while removing contaminated clothing.Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids.While ,it's Inhaled: Remove from exposure and move to fresh air immediately.Then you have the ingesting of the product : If victim is conscious and alert, give 2-4 cupfuls of milk or water.
In addition, 2-Ethyl-3,5-dimethylpyrazine (55031-15-7) can be stable under normal temperature and pressure conditions.You must not take it with strong oxidants.And also prevent it to broken down into hazardous decomposition products: irritating and toxic fumes and gases.