2-Ethyl-3,5(6)-dimethyl pyrazine Aroma characteristics Chocolate, coffee, roasted nuts FEMA 3149 COE 727 CAS 13925-07-0 Molecular formula: C8H12N2 Chinese code S0767 Adaptation range: chocolate, coffee flavor Appearance: colorless to pale yellow liquid Content: 99% Flash point: 57 oC Refractive index: N20 ° C / 4 ° C 1.503 Recommended dosage (PPm): 1-5