Quantity standard：
face | Thin and yellow oil shape liquid | Humidity | ≤1% |
contain | ≥98% | Ash cent | ≤0.01% |
density | 1.1280-1.1350 | Organic acid | ≤0.05% |
Refractive index | 1.4850－1.4868 | remnant aldehyde | ≤1% |
