Molekula
2-Propylpentanoic 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
2-Propylpentanoic acid, also known as valproic acid, is a branched-chain carboxylic acid used as an active pharmaceutical ingredient (anticonvulsant and antimanic agent) and in specialty chemical synthesis and research, including studies of histone deacetylase (HDAC) inhibition. It is a clear to slightly yellow liquid with a pungent odor. CAS: 99-66-1, molecular formula: C8H16O2, molecular weight: 144.21 g/mol. Store at ambient temperature. Hazard classification: Danger. Molekula supplies 2-Propylpentanoic 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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25 g — £42.00 per pack ex VAT · £50.40 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 to slightly yellowish liquor |
| Heavy metals | <20ppm |
| Related Substances | <0.1% |
| Total Impurities | <0.3% |
| Assay (Titration) | 98.5 - 101% |
| Sulphates (SO4)(2-) | <200ppm |
| Chlorine (Cl) | <200ppm |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 111 °C |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | Colorless liquid |
| Odour | Characteristic odor |
| Boiling Point | 219.5 °C |
| Density | 0.904 g/cm³ at 25 °C |
| Water Solubility | 2 g/L at 20 °C |
| Solubility (other solvents) | Very soluble in organic solvents |
| Refractive Index | 1.425 |
| pKa | pKa = 4.8 |
| log P (octanol/water) | 2.75 |
Source: PubChem CID 3121 (HSDB, DrugBank)
Identification
| Property | Value |
|---|---|
| SKU | 75529281 |
| CAS Number | 99-66-1 |
| IUPAC Name | 2-propylpentanoic acid |
| EC Number | 202-777-3 |
| Molecular Formula | CH(CH2CH2CH3)2COOH |
| Molecular Weight | 144.21 |
| Exact Mass | 144.115 |
| SMILES | CCCC(CCC)C(=O)O |
| InChIKey | NIJJYAXOARWZEE-UHFFFAOYSA-N |
| InChI | InChI=1S/C8H16O2/c1-3-5-7(6-4-2)8(9)10/h7H,3-6H2,1-2H3,(H,9,10) |
| PubChem CID | 3121 |
| REACH Code | Y110 |
| HTS Code | 29159014 |
| Tariff Code | 2915907098 |
Safety & GHS
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Corrosive
GHS05
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Health Hazard
GHS07
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Serious Health Hazard
GHS08
Hazard statements
- H302 Harmful if swallowed
- H315 Causes skin irritation
- H318 Causes serious eye damage
- H360 May damage fertility or the unborn child
- H372 Causes damage to organs through prolonged or repeated exposure
Precautionary statements
- P260 Do not breathe 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
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P308+313 IF exposed or concerned: Get medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, 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-Propylvaleric acid
- 4-Heptanecarboxylic acid
- Depakene
- Depakine
- Di-n-propylacetic acid
- Dipropylacetic acid
- Mylproin
- n-Dipropylacetic acid
- Propylvaleric acid
- VALPROIC ACID
Frequently asked questions
What is 2-Propylpentanoic acid used for?
2-Propylpentanoic acid (valproic acid) is itself an active pharmaceutical ingredient, used as an anticonvulsant and antimanic drug. It is also used in research as a histone deacetylase (HDAC) inhibitor and GABA-related agent.
What is the chemical formula and molecular weight of 2-Propylpentanoic acid?
The formula is C8H16O2 and the molecular weight is 144.21 g/mol.
How should 2-Propylpentanoic acid be stored?
It should be stored at ambient temperature, away from moisture and incompatible materials.
What grade of 2-Propylpentanoic acid does Molekula supply?
Molekula supplies it in technical grade; custom grades are available upon request.
Can Molekula supply 2-Propylpentanoic acid in bulk?
Yes, bulk quantities are available—please contact our sales team for pricing and availability.
What documentation comes with an order of 2-Propylpentanoic 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.