Overview
Propionaldehyde (CAS 123-38-6 ), also known as propionic aldehyde, is a short-chain aliphatic aldehyde used primarily as a building block in flavor and fragrance manufacturing.
Its sharp, slightly fruity character makes it a valued raw material for synthesizing aroma compounds at commercial scale. In flavor creation, it is used to produce aldehydic top notes in food flavoring systems.
It contributes to profiles found in dairy, fruit, and bread-type products and carries FEMA 2923 status, supporting its use in regulated food applications across the global market.
Fragrance manufacturers use it as an intermediate in the synthesis of longer-chain aldehydes and other aroma chemicals that appear in fine fragrance and personal care formulations.
It also functions as a chemical intermediate in the production of propionic acid derivatives, trimethylolethane, and other downstream industrial chemicals used in various manufacturing sectors.
In cosmetic fragrance compounding, it enables the construction of fresh, clean scent profiles in rinse-off and leave-on product formats, ensuring versatility for formulators and chemists.
Propionaldehyde is supplied as a colorless liquid, typically in bulk quantities suited to industrial and flavor-house procurement. Standard commercial grades are available for immediate shipping.
High-purity specifications meet the requirements of flavor and fragrance applications under FEMA guidelines, ensuring consistent quality and performance for all industrial chemical applications.
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Physical Properties
| Melting Point | -81 °C |
| Boiling Point | 49 °C @ Press: 760 Torr |
| Density | 0.8657 g/cm³ @ Temp: 25 °C |
| Flash Point | −16 °F |
| Appearance | Propionaldehyde is a colorless liquid. Very strong, intensive fruit odor |
| Color | White |
| Odor | at 0.10 % in propylene glycol. earthy alcohol wine whiskey cocoa nutty |
| Form | Liquid |
| Water Solubility | 540 g/L (20 ºC) |
| Vapor Pressure | 18.77 psi ( 55 °C) |
| Refractive Index | n 20/D 1.362(lit.) |
| Log P | 0.59 at 25℃ |
Safety & Handling
Danger GHS02 GHS07 GHS08 Hazard Statements H225 Highly Flammable liquid and vapor H302 Harmful if swallowed H315 Causes skin irritation H319 Causes serious eye irritation H332 Harmful if inhaled H335 May cause respiratory irritation H336 May cause drowsiness or dizziness H371 May cause damage to organs H373 May causes damage to organs through prolonged or repeated exposure H402 Harmful to aquatic life Precautionary Statements 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. 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. P273 Avoid release to the environment. P280 Wear protective gloves/protective clothing/eye protection/face protection. P317 Get emergency medical help. 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. P337+P317 If eye irritation persists: Get medical advice/attention. Get emergency medical help. 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 | 29121900 |
| UN Number | 1275 |
| ADR Class | 3 |
| Packing Group | II |
| Storage Class | 3 - Flammable liquids |
| WGK (Germany) | 1 |
Other Names
Related Products
Chemical Properties
- CAS Number
- 123-38-6
- EC Number
- 204-623-0
- Mol. Weight
- 58.08
- HS Code
- 29121900
- Category
- Flavors & Fragrances