Propionaldehyde
Propionaldehyde (CAS: 123-38-6), also known as propanal, is an organic compound with the chemical formula CH3CH2CHO. This volatile, flammable liquid is a key intermediate in organic synthesis. It serves as a building block for various chemicals, including pharmaceuticals, pesticides, and perfumes. Its reactivity makes it valuable in producing important organic compounds.
- IUPAC
- Propanal
- Synonyms
- Propanal

Organic Synthesis Intermediate
Propionaldehyde is a fundamental building block in organic chemistry. It is used in the synthesis of a wide array of organic compounds, including alcohols, carboxylic acids, and amines, which are precursors for pharmaceuticals and fine chemicals.
Fragrance and Flavor Industry
The compound can be utilized in the synthesis of fragrance components and flavouring agents. Its derivatives contribute to specific aromatic profiles desired in perfumes and food products.
Precursor for Propionic Acid
Oxidation of propionaldehyde yields propionic acid, an important preservative in animal feed and a precursor for various esters and salts used in different industrial applications.
Agrochemical Synthesis
It finds application in the production of certain pesticides and herbicides. The aldehyde functionality allows for its incorporation into complex molecules designed for crop protection.
| Molecular weight | 58.08 |
|---|---|
| Linear formula | CH3CH2CHO |
| Assay | 97% |
| Boiling point | 46-50 °C(lit.) |
| Density | 0.805 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.362(lit.) |
| Vapour pressure | 18.77 psi (55 °C)4.89 psi (20 °C) |
| Melting point | −81 °C(lit.) |
| Vapour density | 2 (vs air) |
| Autoignition temp | 404 °F |
| Storage temperature | 2-8°C |



Hazard statements
- H225Highly flammable liquid and vapour
- H302Harmful if swallowed
- H315Causes skin irritation
- H318Causes serious eye damage
- H335May cause respiratory irritation
Precautionary statements
- P210Keep away from heat, sparks and open flames. No smoking
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US) |
|---|---|
| Flash point | -40 °C / -40 °F |
| Transport (UN / ADR) | UN 1275 3 / PGII |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | F,Xn |
| Risk statements (R) | 11-20/22-37/38-41 |
| Safety statements (S) | 9-16-29 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 17 %, 26 °F2.6 %, 31 °F |
|---|
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is Propionaldehyde used for?
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Propionaldehyde is primarily used as an intermediate in organic synthesis. It serves as a building block for pharmaceuticals, fragrances, flavouring agents, propionic acid, and agrochemicals.
What is the CAS number and formula for Propionaldehyde?
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The CAS number for Propionaldehyde is 123-38-6, and its chemical formula is CH3CH2CHO.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies Propionaldehyde with an assay of 97%. We do not represent this product as USP, BP, EP, or any other pharmacopoeia grade.
How should Propionaldehyde be handled safely?
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Propionaldehyde is a highly flammable liquid and vapour, harmful if swallowed or inhaled, causes skin irritation, and serious eye damage. It may also cause respiratory irritation. Handle with appropriate personal protective equipment (gloves, eyeshields, full-face respirator) in a well-ventilated area, away from ignition sources. Storage should be at 2-8°C.
Is Propionaldehyde a controlled substance?
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The provided data does not indicate that Propionaldehyde is a controlled substance.
How is Propionaldehyde packed, shipped, and exported?
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Propionaldehyde is packed according to UN 1275, Class 3, Packing Group II regulations. Tech Serve Solutions, established in 1998, is a specialist global supplier and exporter of fine chemicals.
How can I request a sample or quote for Propionaldehyde?
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To request a sample or quote for Propionaldehyde, please contact our sales team through our website or by phone.
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