Molekula
Isobutyric acid
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
Isobutyric acid is a branched-chain carboxylic acid used in the synthesis of esters, pharmaceuticals, and flavorings. It is a colorless liquid with a pungent odor. CAS: 79-31-2, molecular formula: (CH3)2CHCO2H, molecular weight: 88.11 g/mol. Store at ambient temperature. Signal word: Danger. Molekula supplies Isobutyric acid 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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500 mL — £85.00 per pack ex VAT · £102.00 inc. VAT
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500 g — £72.00 per pack ex VAT · £86.40 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 transparent liquid |
| Assay | ≥99.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 55 °C |
| Transport Class | 3 (8) |
| Packing Group | III |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Sharp, butter-fat-like odor |
| Melting Point | -46 °C |
| Boiling Point | 154.4 °C |
| Density | 0.95 (relative, water = 1) |
| Water Solubility | 167 g/L at 20 °C |
| Solubility (other solvents) | Slightly soluble in carbon tetrachloride |
| Vapour Pressure | 0.13 kPa at 14.7 °C |
| Refractive Index | 1.3930 |
| pKa | pKa = 4.84 (at 20 °C) |
| log P (octanol/water) | 0.94 |
Source: PubChem CID 6590 (HSDB, DrugBank, ICSC)
Identification
| Property | Value |
|---|---|
| SKU | 90033397 |
| CAS Number | 79-31-2 |
| IUPAC Name | 2-methylpropanoic acid |
| EC Number | 201-195-7 |
| Molecular Formula | (CH3)2CHCO2H |
| Molecular Weight | 88.11 |
| Exact Mass | 88.0524 |
| SMILES | CC(C)C(=O)O |
| InChIKey | KQNPFQTWMSNSAP-UHFFFAOYSA-N |
| InChI | InChI=1S/C4H8O2/c1-3(2)4(5)6/h3H,1-2H3,(H,5,6) |
| PubChem CID | 6590 |
| UN Number | UN2529 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29159018 |
| Tariff Code | 2915601990 |
Safety & GHS
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Flammable
GHS02
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Corrosive
GHS05
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Toxic
GHS06
Hazard statements
- H226 Flammable liquid and vapour
- H302 Harmful if swallowed
- H311 Toxic in contact with skin
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P210 Keep away from heat/sparks/open flames/hot surfaces - No smoking
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P301+312 IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell
- 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
Documents
Safety Data Sheets (SDS)
Available in English, English (US), French, German, Italian, 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
- 2-Methylpropanoic acid
- Acetic acid, dimethyl-
- alpha-Methylpropanoic acid
- alpha-Methylpropionic acid
- Cenex RP b2
- Dimethylacetic acid
- Isobutanoic acid
- Isopropylformic acid
- Propanoic acid, 2-methyl-
- Propionic acid, 2-methyl-
Frequently asked questions
What is isobutyric acid used for?
Isobutyric acid is used in the synthesis of pharmaceuticals, fragrances, and as a flavoring agent in food products.
What is the chemical formula and molecular weight of isobutyric acid?
The formula is (CH3)2CHCO2H and the molecular weight is 88.11 g/mol.
How should isobutyric acid be stored?
It should be stored at ambient temperature, away from incompatible materials and moisture.
What grade of isobutyric acid does Molekula supply?
Molekula supplies isobutyric acid in technical grade; custom grades available upon request.
Can Molekula supply isobutyric acid in bulk?
Yes, Molekula can supply isobutyric acid in bulk quantities; please contact sales for details.
What documentation comes with an order of isobutyric acid?
Each order includes a Certificate of Analysis and Safety Data Sheet (SDS) with the shipment.
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.