Chemical name, CAS number, molecular formula, relative molecular mass requirements Color: colorless and transparent liquid Aroma: with fruity, fat and almond odor Isovaleraldehyde content (GC, %): ≥99.0 Refractive index (20℃): 1.387 -1.391 Relative density (20℃/20℃): 0.795-0.804 Test method inspection rules marking, packaging, transportation, storage, shelf life