Absolute or anhydrous alcohol refers to ethanol with a low water content. There are various grades with maximum water contents ranging from 1% to a few parts per million (ppm) levels. Absolute alcohol is not intended for human consumption. If azeotropic distillation is used to remove water, it will contain trace amounts of the material separation agent (e.g. benzene).
Uses
Absolute ethanol is used as a solvent for laboratory and industrial applications, where water will react with other chemicals, and as fuel alcohol
Also used As a fuel, Alcoholic beverages, Feedstock, & Antiseptic.
Specification
| Sr. No | Determination | Specification |
|---|---|---|
| 1 | Total acidity (As HNO3)% by mass | 68 % min |
| 2 | Appearance | Clear Colorless Liquid |
| 3 | Nitrogen oxides(as HNO2) % by mass | 0.006 Max |
| 4 | Chlorides(as Cl )%by mass max | 0.002 Max |
| 5 | Sulphate (as H2SO4) % by mass | 0.005 Max |
| 6 | Residue Ignition | 0.05 Max |