Molekula
4-Methyloctanoic 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
4-Methyloctanoic acid is a branched-chain fatty acid used in fragrance synthesis, flavor formulations, and as a precursor in organic chemistry for creating custom esters and derivatives. It appears as a colorless to pale yellow liquid with a mild, fatty odor. CAS 54947-74-9, molecular formula CH3(CH2)3CH(CH3)CH2CH2CO2H, molecular weight 158.24 g/mol, and requires ambient storage. Hazard classification includes a Danger signal word because it causes severe skin burns and eye damage (H314, Skin Corr. 1B). Molekula supplies 4-Methyloctanoic 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.
-
5 g — £30.90 per pack ex VAT · £37.08 inc. VAT
-
25 g — £72.30 per pack ex VAT · £86.76 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 | Light yellow liquid |
| Density | 0.906 - 0.914 |
| Identification | Conforms to reference |
| Assay | ≥98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 113 °C |
| Transport Class | 8 |
| Packing Group | III |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Boiling Point | 149 °C (22 mmHg) |
Source: PubChem CID 62089 (Joint FAO/WHO Expert Committee on Food Additives (JECFA))
Identification
| Property | Value |
|---|---|
| SKU | 27242307 |
| CAS Number | 54947-74-9 |
| IUPAC Name | 4-methyloctanoic acid |
| EC Number | 259-404-2 |
| Molecular Formula | CH3(CH2)3CH(CH3)CH2CH2CO2H |
| Molecular Weight | 158.24 |
| Exact Mass | 158.1307 |
| SMILES | CCCCC(C)CCC(=O)O |
| InChIKey | LEGGANXCVQPIAI-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H18O2/c1-3-4-5-8(2)6-7-9(10)11/h8H,3-7H2,1-2H3,(H,10,11) |
| PubChem CID | 62089 |
| UN Number | UN3265 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29159050 |
| Tariff Code | 2915907098 |
Safety & GHS
-
Corrosive
GHS05
Hazard statements
- H314 (sub cat. 1B) Causes severe skin burns and eye damage
Precautionary statements
- P260 Do not breathe dust/fume/gas/mist/vapours/spray
- P264 Wash thoroughly after handling
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P305+351+338 IF IN EYES: Rinse with water for several minutes. Remove contact lenses if present and easy to do. Continue rinsing
- P315 Get immediate medical advice/attention
Documents
Safety Data Sheets (SDS)
Available in English, 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
- (4S)-4-methyloctanoate
- 4-Methyl-n-octanoic Acid
- 4-Methylcaprylic acid
- 4-Methyloctanoic Acid; 4-Methylcaprylic Acid;
- FEMA 3575
- FEMA No. 3575
- HIRCINOIC ACID
- l-4-Methyloctanoic acid
- Octanoic acid, 4-methyl-
Frequently asked questions
What is 4-Methyloctanoic acid commonly used for?
4-Methyloctanoic acid is primarily used as a fragrance ingredient in perfumery and flavor applications, as well as a building block for specialty chemicals.
What is the chemical formula and molecular weight of 4-Methyloctanoic acid?
The chemical formula is **CH₃(CH₂)₃CH(CH₃)CH₂CH₂CO₂H**, and the molecular weight is **158.24 g/mol**.
What safety classification does 4-Methyloctanoic acid have?
The product is classified with the **signal word 'Danger'** due to its potential hazards; full SDS is provided with orders.
How should 4-Methyloctanoic acid be stored?
Store in a tightly sealed container at **ambient temperature**, away from oxidizing agents and sources of ignition.
Does Molekula supply 4-Methyloctanoic acid in bulk quantities?
Yes, we offer bulk packaging options—please contact our sales team for minimum order quantities and pricing.
What documentation is included with an order of 4-Methyloctanoic acid?
Each order includes a **Certificate of Analysis (CoA)**, **Safety Data Sheet (SDS)**, and **Material Safety Information** for compliance.
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.