Molekula
Propionic acid 99%
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 2000 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
Propionic acid 99% is a colorless, corrosive organic acid used in food preservation, pharmaceuticals, and chemical synthesis. It is a key intermediate in the production of polymers and esters. Available in 1L, 5L, and 20L containers, it has a CAS number of 79-09-4, molecular formula CH3CH2COOH, and molecular weight of 74.08 g/mol. Stored at ambient temperatures, it carries a Danger signal word due to its corrosive nature. Molekula supplies Propionic acid 99% from research to bulk quantities with full documentation and ISO 9001:2015 traceability.
Example image for illustration only. Other packaging and pack sizes are available.
Pricing & pack sizes
These pack sizes aren't a limit. Molekula manufactures, sources and repacks to order — if you need 500 kg and only see 1 kg listed, . We quote from grams to multi-tonne.
Need a different size? Add the nearest pack and change the size in your basket — we price it at the same rate per unit.
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100 mL — £28.00 per pack ex VAT · £33.60 inc. VAT
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1 kg — £31.60 per pack ex VAT · £37.92 inc. VAT
Need a different quantity or pack?
Tell us how much you need and when — drums, IBCs, sacks or a one-off bulk lot. We'll manufacture or source it and come back with a price.
Prices exclude VAT/sales tax and shipping.
Specifications
| Property | Value |
|---|---|
| Appearance | Colourless liquid |
| Assay/Purity | ≥99.5% |
| Colour (Pt-Co) | ≤ 10 |
| Water | ≤ 0.25% |
| Identification (RAMAN) | Conforms to Reference |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 53 °C |
| Transport Class | 8 (3) |
| Packing Group | II |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Clear, colorless liquid |
| Odour | Slightly pungent disagreeable, rancid odor |
| Melting Point | -20.7 °C |
| Boiling Point | 141.1 °C |
| Density | 0.99 (relative, water = 1) |
| Water Solubility | 1000 g/L at 25 °C (miscible) |
| Solubility (other solvents) | Miscible with ethanol; soluble in diethyl ether; slightly soluble in chloroform |
| Vapour Pressure | 0.39 kPa at 20 °C |
| Refractive Index | 1.3869 |
| pKa | pKa = 4.88 |
| log P (octanol/water) | 0.33 |
Source: PubChem CID 1032 (HSDB, DrugBank, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 55644582 |
| CAS Number | 79-09-4 |
| IUPAC Name | propanoic acid |
| EC Number | 201-176-3 |
| Molecular Formula | CH3CH2COOH |
| Molecular Weight | 74.08 |
| Exact Mass | 74.0368 |
| SMILES | CCC(=O)O |
| InChIKey | XBDQKXXYIPTUBI-UHFFFAOYSA-N |
| InChI | InChI=1S/C3H6O2/c1-2-3(4)5/h2H2,1H3,(H,4,5) |
| PubChem CID | 1032 |
| UN Number | UN3463 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29155010 |
| Tariff Code | 2915500000 |
Safety & GHS
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Flammable
GHS02
-
Corrosive
GHS05
-
Toxic
GHS06
Hazard statements
- H226 Flammable liquid and vapour
- H302+332 Harmful if swallowed or inhaled
- H311 Toxic in contact with skin
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
- H335 May cause respiratory irritation
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P303+361 IF ON SKIN (or hair): Remove immediately all contaminated clothing. Rinse with water/shower
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P307+311 IF exposed: Call a POISON CENTER or doctor/physician
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, Russian, Spanish.
Certificate of Analysis (CoA) by batch
Enter a lot or batch number to retrieve the CoA for that specific batch. We can generate one from spec data if no PDF is on file.
Synonyms
- Carboxyethane
- Ethanecarboxylic acid
- ethylformic acid
- Luprosil
- Metacetonic acid
- methylacetic acid
- Monoprop
- Propanoic acid
- Prozoin
- Pseudoacetic acid
Frequently asked questions
What is propionic acid (99%) commonly used for?
Propionic acid is widely used as a preservative in food, animal feed, and pharmaceuticals, as well as in the production of cellulose esters and plasticizers.
What is the chemical formula and molecular weight of propionic acid?
The chemical formula is **CH₃CH₂COOH** and the molecular weight is **74.08 g/mol**.
How should propionic acid (99%) be stored?
Store at **ambient temperature** in a tightly sealed container, away from incompatible substances and sources of ignition.
What grades of propionic acid does Molekula supply?
Molekula supplies **propionic acid at 99% purity**—please confirm if other grades are needed.
Can Molekula supply propionic acid in bulk quantities?
Yes, we offer **bulk quantities** of propionic acid (99%)—contact us for pricing and availability.
What documentation comes with a propionic acid order?
Each order includes a **Certificate of Analysis (CoA)**, Material Safety Data Sheet (MSDS), and a packing list.
Ready to order or need a custom pack?
Tell us the product, grade, and quantity — Molekula usually responds within one working day with pricing and lead time.