Technical indicators: Color Shape Colorless liquid Odor type Wine odor, a special fruit odor Ester content (%) ≥99.0% Relative density (25/25°C) 1.029-1.037 Refractive Index (20°C) 1.4080-1.4220 Arsenic (As) content (%) ≤0.0003 Heavy metals (as Pb)% ≤0.001 Acid Value ≤5.0 Optical purity ≥99.0