Grade designation | Specific gravity at 270/270C | Optical rotation | Refractive index at 270C** | ACID VALUE MAXIMUM (using 2 to 2.5grams of the sample) | Saponification value | Saponification value after acetylation | Carbonyl Value (Using 1 to 1.5 grams of the sample) (minimum) | Total Alcohol (calculated on molecular weight 220 percent by weight (minimum) | Solubility in 80% (by volume) Ethyl alcohol |
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 |
Grade-I | 0.994 to 1.017 | +100 to +250 | 1.5172 to 1.5312 | 35 | 25 to 50 | 125 to 155 | 55 | 55 | One to two volumes |
Description and appearance
- Oil of vetiver roots (cultivated) shall be obtained by steam or hydro-distillation of clean, fresh or air dry roots of the cultivated plant called Vetiveria zizanioides (Linn) Nash family : Gramineae. The oil shall be clear, free from sediment, suspended matter, separated water and adulterants. It shall have characteristic and persistent aroma with pleasant woody character and shall be light brown to reddish brown, sometimes greenish in colour.