Overview
Acetaldehyde (CAS 75-07-0 ), also known as ethyl aldehyde and acetic aldehyde, is a short-chain aldehyde used primarily as a chemical intermediate and flavoring agent across food, fragrance, and pharmaceutical manufacturing.
Its reactive carbonyl group makes it a building block for synthesizing a broad range of downstream compounds at industrial scale. In food and beverage production, this compound contributes fresh, fruity, and ethereal notes.
Known by FEMA 2003 , it is essential to flavor formulations, particularly in dairy, fruit, and alcoholic beverage profiles. Fragrance manufacturers use it as an intermediate in aldehyde-based perfume accords.
It supports the characteristic clean, soapy top notes found in classic fine fragrance compositions. In pharmaceutical synthesis, it functions as a precursor in the production of acetic acid and pyridine derivatives.
The material is also used for other active pharmaceutical intermediates. It sees use as a preservative intermediate in certain industrial applications where controlled antimicrobial action is required during processing.
The product is supplied as a liquefied, low-boiling liquid, typically handled and shipped under refrigeration or pressure. Food-grade material conforming to FCC specifications is available for flavor applications.
Technical-grade material is supplied for industrial synthesis and chemical manufacturing use. This ensures high purity and reliability for large-scale production requirements across various global industrial sectors.
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Physical Properties
| Melting Point | -123.5 °C |
| Boiling Point | 21 °C |
| Density | 0.788 g/cm³ @ Temp: 16 °C |
| Flash Point | 133 °F |
| Appearance | Acetaldehyde is a flammable, volatile, colorless liquid, or gas. It has a characteristic, penetrating, fruity odor. |
| Color | White to off-white |
| Odor | Pungent, fruity odor detectable at 0.0068 to 1000 ppm (mean = 0.067 ppm) |
| Form | solution |
| Water Solubility | > 500 g/L (20 ºC) |
| Vapor Pressure | 52 mm Hg ( 37 °C) |
| Refractive Index | n 20/D 1.377 |
| pH | 5 (10g/l, H2O, 20℃) |
| Log P | -0.16 |
Safety & Handling
Danger GHS02 GHS07 GHS08 GHS06 Hazard Statements H224 Extremely flammable liquid and vapor H302 Harmful if swallowed H311 Toxic in contact with skin H315 Causes skin irritation H317 May cause an allergic skin reaction H319 Causes serious eye irritation H332 Harmful if inhaled H335 May cause respiratory irritation H336 May cause drowsiness or dizziness H341 Suspected of causing genetic defects H350 May cause cancer H351 Suspected of causing cancer H360 May damage fertility or the unborn child H361 Suspected of damaging fertility or the unborn child H370 Causes damage to organs H372 Causes damage to organs through prolonged or repeated exposure H402 Harmful to aquatic life Precautionary Statements P203 Obtain, consult and follow expert instructions for use. P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. P233 Keep container tightly closed. P240 Ground and bond container and receiving equipment. P241 Use explosion-proof [electrical/ventilating/lighting/…] equipment. P242 Use non-sparking tools. P243 Take action to prevent static discharges. P260 Do not breathe dust/fume/gas/mist/vapours/spray. P261 Avoid breathing dust/fume/gas/mist/vapours/spray. P262 Do not get in eyes, on skin, or on clothing. P264 Wash … thoroughly after handling. P270 Do not eat, drink or smoke when using this product. P271 Use only outdoors or in a well-ventilated area. P272 Contaminated work clothing should not be allowed out of the workplace. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P316 Get emergency medical help immediately. P317 Get emergency medical help. P318 IF exposed or concerned, get medical advice. P319 Get medical advice/attention if you feel unwell. P321 Specific treatment (see … on this label). P330 Rinse mouth. P405 Store locked up. P501 Dispose of contents/container in accordance with local regulations. P264+P265 Wash … thoroughly after handling. P301+P317 Get emergency medical help. P302+P352 IF ON SKIN: Wash with plenty of water. P304+P340 IF INHALED: Remove person to fresh air and keep comfortable for breathing. P308+P316 Get emergency medical help immediately. P332+P317 Get emergency medical help. P333+P317 Get emergency medical help. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. P361+P364 Take off immediately all contaminated clothing and wash it before reuse. P362+P364 Take off contaminated clothing and wash it before reuse. P370+P378 Use … for extinction. P403+P233 Store in a well-ventilated place. Keep container tightly closed. P403+P235 Store in a well-ventilated place. Keep cool. P303+P361+P353 IF ON SKIN (or hair): Take off immediately all contaminated clothing. Rinse skin with water/shower. P305+P351+P338 IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Trade & Regulatory
| HS Code | 29121200 |
| UN Number | 1198 |
| ADR Class | 3 |
| Packing Group | III |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 2 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 75-07-0
- EC Number
- 200-836-8
- Mol. Weight
- 44.05
- HS Code
- 29121200
- Category
- Pigments & Colorants