Ethanol for UV
| Formula | C2H6O |
| Chemical formula | C2H5OH |
| Density | 0.790- 0.793 g/cm3 |
| Molar mass | 46.07 g/mol |
| CAS number | 64-17-5 |
| HS Code | 22071000 |
| EC number | 200-578-6 |
| Storage | at +15 to +25 °C |
| SDS | available |
| RTECS | KQ6300000 |
| R phrase | R 11 |
| S phrase | S 7-16 |
| Odour | alcohol like |
| Form | liquid |
| Color | colourless |
| Explosion limit | 3.5 – 15 Vol % |
| Ignition temprature | 425 °c |
| Solubility in water | soluble (20°C) |
| Solubility in chloroform | soluble |
| Flash point | 12 °C |
| Boiling point | 78.3°C |
| Melting point | -114.5°C |
| Vapour pressure | 59 hPa |
| Viscosity dynamical | 1.2 mPa*s |
| Saturation concentration | 105 g/m3 |
| Assay | ≥ | 99.9 | % |
| Description | Conforms | ||
| Identification | Conforms | ||
| Solubility | Conforms | ||
| Colour | ≤ | 10 | Hazen |
| Water | ≤ | 0.1 | % |
| Evaporation Residue | ≤ | 2.0 | mg/l |
| Acidity & Alkalinity | ≤ | 0.0002 | meq/g |
| Transmission at 207 nm | ≥ | 10 | % |
| Transmission at 220 nm | ≥ | 50 | % |
| Transmission at 235 nm | ≥ | 80 | % |
| Transmission at 245 nm | ≥ | 90 | % |
| Transmission from 270 nm | ≥ | 98 | % |
Ethanol for UV is a high-purity, low-absorbance solvent specifically refined for ultraviolet (UV) and spectrophotometric applications in pharmaceutical and analytical laboratories. It ensures accurate and reproducible optical measurements for the analysis of drug substances, excipients, and formulations where precision and optical clarity are essential.
🏭⚗️ Production
Ethanol for UV is produced through multi-stage fractional distillation and advanced purification techniques designed to eliminate aldehydes, peroxides, moisture, and other UV-absorbing impurities that may interfere with analytical accuracy. The solvent is filtered, tested for spectral purity, and packaged in amber, moisture-resistant containers under inert conditions to maintain chemical stability and optical transparency during storage and use.
🔬 Properties
Ethanol is a clear, colorless, and volatile liquid with a mild, characteristic odor. It has high polarity and is completely miscible with water and most organic solvents. With a boiling point near 78 °C and a density of approximately 0.79 g/cm³ at 20 °C, ethanol provides excellent solvency for a broad range of polar and semi-polar compounds. Its high transparency and low absorbance above 210 nm make it ideal for UV–Vis spectrophotometric measurements in pharmaceutical and laboratory analyses.
🧪 Applications
Ethanol for UV is extensively used in pharmaceutical research and quality control laboratories for spectrophotometric determination of drug purity, concentration, and stability. It serves as a solvent for the preparation of calibration standards, reference solutions, and assay samples used in quantitative UV–Vis analysis. Due to its polarity and chemical compatibility, ethanol is suitable for dissolving active pharmaceutical ingredients (APIs), excipients, and analytical standards. It is also employed in extraction and purification of bioactive compounds, dissolution testing, and validation of analytical methods requiring high optical precision and reproducibility.
⚠️ Safety
Ethanol is highly flammable and should be handled with care in well-ventilated areas or fume hoods, away from open flames, sparks, and heat sources. Prolonged or excessive exposure may cause irritation, dizziness, or drowsiness. Proper personal protective equipment such as gloves, goggles, and lab coats must be worn. Containers should remain tightly sealed when not in use and stored in a cool, dry, well-ventilated environment. Waste ethanol and residues must be disposed of according to laboratory hazardous waste regulations.
