Pyrazine CAS: 290-37-9 FEMA: 290 Synonyms: the two nitrogen impurity benzene Molecular formula: C4H4N2 Formula: Quality and technical standard: Aroma: spicy candy taste bitter, aromatic Appearance: colorless to pale yellow liquid. Content (gas chromatography) : 99% or greater Refractive index (@ 200 c) : 1.5070 Relative density (@ 200 40 c/c) : 1.031 Flash: 55 ℃ It is widely used in baking food, cold drinks, dairy products Suggested usage: 0.3 5 PPM Packing: sealing good aluminum. Net weight: 1000 g. Storage: Add 0.1% of butylated hydroxytoluene as stabilizer, stored in a cool and dry place, inside space under the security permission as small as possible, and nitrogen protection.When stored more than 6 months, need to confirm the quality of the product before use.