CAS Number:
64-17-5
Chem/INCI Name:
Alcohol (Denat.) or Ethanol
Molecular Formula:
C2H6O
Molecular Weight:
46.07 g/mol
Uses:
A versatile solvent and disinfectant, commonly supplied as 96% v/v (vol/vol). The key property of this concentration is that it is an azeotrope, meaning it cannot be further purified by simple distillation. It is widely used in:
· Personal Care & Cosmetics: Acts as a solvent, astringent, and carrier for fragrances and active ingredients. It is also a core component in hand sanitizers and disinfectants.
· Laboratory & Analytical Chemistry: Employed as a primary solvent for precipitation, extraction, and analysis due to its purity and reproducibility.
· Industrial & Technical: Used in the production of inks, coatings, detergents, and as a general-purpose solvent.
Origin:
Ethanol is produced either by fermentation of biomass (sugars from crops like corn or sugarcane) or by synthetic processes such as the catalytic hydration of ethylene.
What does Ethanol 96% do in a formulation?
Its primary functions are:
- Solvent (for dissolving other substances)
- Antimicrobial (disinfectant)
- Astringent (skin-tightening)
- Viscosity Decreasing Agent
Safety Profile:
· Hazard Classification: Highly flammable liquid and vapor. Causes serious eye irritation.
· Primary Hazards: Flammable, with a flash point as low as 17°C. Vapors are heavier than air and can travel to ignition sources.
· Safety Precautions: Requires storage in well-ventilated areas away from heat and open flames. Use appropriate personal protective equipment (PPE).
Technical profile:
| Property | Values |
| Appearance | Colorless, clear liquid |
| Odor | Characteristic alcoholic odor |
| Boiling Point | 78°C - 78.5°C |
| Melting Point | -114°C |
| Density | 0.805 - 0.812 g/mL at 20°C |
| Refractive Index | ~1.361 (n20/D) |
| Vapor Pressure | 44.6 mmHg at 20°C |
| Flash Point | 17°C (closed cup) |
| Assay (Ethanol Content) | 95.5% - 96.9% (v/v) |
| Water Content | ~4% (by volume, as part of the azeotrope) |