Propionic acid
Propionic acid (CAS: 79-09-4) is a saturated monocarboxylic acid with the linear formula CH3CH2COOH and a molecular weight of 74.08 g/mol. This colourless liquid, characterised by its pungent odour, is soluble in water and organic solvents. It is widely employed as a chemical intermediate in the synthesis of various compounds, including herbicides, pharmaceuticals, and flavourings. Propionic acid also serves as a preservative in animal feed and foodstuffs.
- IUPAC
- Acid C3,Propanoic acid,Propanyl acid
- Synonyms
- Propanoic acidEthylformic acidHydrocarbonarboxylic acid C3CarboxyethanePropanecarboxylic acid
Chemical Synthesis
Propionic acid serves as a crucial building block in organic synthesis. It is a precursor for the production of esters, amides, and acid chlorides, which find applications in pharmaceuticals, polymers, and agrochemicals.
Preservative
Utilised for its antimicrobial properties, propionic acid and its salts are effective preservatives in animal feed, preventing mould growth. It is also used in some food products, such as baked goods, to extend shelf life.
Herbicides and Pesticides
The compound is an intermediate in the manufacture of certain herbicides and pesticides. Its derivatives are integral to the synthesis of crop protection agents.
Flavour and Fragrance Industry
Esters derived from propionic acid contribute to various flavour and fragrance profiles, used in food products and perfumes.
| Molecular weight | 74.08 |
|---|---|
| Linear formula | CH3CH2COOH |
| Assay | ≥99.5% |
| Grade | ACS reagent |
| Colour | APHA: ≤20 |
| Boiling point | 141 °C(lit.) |
| Density | 0.993 g/mL at 25 °C(lit.) |
| Melting point | −24-−23 °C(lit.) |
| Refractive index | n20/D 1.386(lit.) |
| Vapour pressure | 2.4 mmHg (20 °C) |
| Vapour density | 2.55 (vs air) |
| Autoignition temp | 955 °F |
| Impurities tested | ≤0.002% Carbonyl compounds≤0.10% Readily oxidizable substances (as HCOOH)≤0.15% water |
Hazard statements
- H226Flammable liquid and vapour
- H314Causes severe skin burns and eye damage
Precautionary statements
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
- P310Immediately call a POISON CENTER or doctor
| Protective equipment | Faceshields, full-face respirator (US), Gloves, Goggles, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 54 °C / 129.2 °F |
| Transport (UN / ADR) | UN 3463 8/PG 2 |
| Water hazard class (WGK, DE) | 1 |
| Hazard codes (EU) | C |
| Risk statements (R) | 10-34 |
| Safety statements (S) | 23-36-45 |
| Cation traces | heavy metals (as Pb): ≤0.001% |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
| Expl Lim | 12.1 % |
|---|---|
| Evapn Residue | ≤0.01% |
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 Propionic acid (CAS 79-09-4) used for?
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Propionic acid (CAS: 79-09-4) is used as a chemical intermediate in the synthesis of herbicides, pharmaceuticals, and flavourings, and as a preservative in animal feed and foodstuffs.
What is the CAS number and formula for Propionic acid?
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The CAS number for Propionic acid is 79-09-4, and its linear formula is CH3CH2COOH.
What grade and purity does Tech Serve Solutions supply for Propionic acid?
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Tech Serve Solutions supplies Propionic acid with an assay of ≥99.5%, conforming to ACS reagent grade specifications. We do not represent this product as USP, BP, or EP grade.
How should Propionic acid be handled safely?
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Propionic acid is a flammable liquid and causes severe skin burns and eye damage (H226, H314). Appropriate personal protective equipment, including chemical-resistant gloves, eye protection (goggles and face shield), and respiratory protection, must be used. Handle in a well-ventilated area away from ignition sources.
How is Propionic acid packed, shipped, and exported by Tech Serve Solutions?
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Propionic acid is packed in compliance with relevant regulations for hazardous materials. We are experienced in global shipping and export, ensuring safe and compliant delivery to international destinations.
How can I request a sample or a quote for Propionic acid?
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To request a sample or a quote for Propionic acid, please contact our sales team through the website or by phone, providing your specific requirements.
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