Molekula
n-Heneicosane
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
n-Heneicosane is a straight-chain alkane with 21 carbon atoms, used as a standard reference compound in analytical chemistry and as a component in calibration standards and lubricants. It has a CAS number of 629-94-7, a molecular formula of CH3(CH2)19CH3, and a molecular weight of 296.57 g/mol. It is stable at ambient storage conditions and carries no signal word. Molekula supplies n-Heneicosane 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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10 g — £200.00 per pack ex VAT · £240.00 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 | white to off white powder |
| Identification | Conforms to reference |
| Purity | ≥97% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 113 °C |
| Acidity | Neutral |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Appearance | White solid |
| Odour | Odorless |
| Melting Point | 40.4 °C |
| Boiling Point | 359 °C |
| Density | 0.7919 g/cm³ at 20 °C |
| Water Solubility | Insoluble in water |
| Solubility (other solvents) | Slightly soluble in ethanol; soluble in petroleum ether |
| Vapour Pressure | 8.73 × 10⁻⁵ mmHg at 25 °C (extrapolated) |
| Refractive Index | 1.4441 |
Source: PubChem CID 12403 (HSDB)
Identification
| Property | Value |
|---|---|
| SKU | 90033301 |
| CAS Number | 629-94-7 |
| IUPAC Name | henicosane |
| EC Number | 211-118-9 |
| Molecular Formula | CH3(CH2)19CH3 |
| Molecular Weight | 296.57 |
| Exact Mass | 296.3443 |
| SMILES | CCCCCCCCCCCCCCCCCCCCC |
| InChIKey | FNAZRRHPUDJQCJ-UHFFFAOYSA-N |
| InChI | InChI=1S/C21H44/c1-3-5-7-9-11-13-15-17-19-21-20-18-16-14-12-10-8-6-4-2/h3-21H2,1-2H3 |
| PubChem CID | 12403 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 29011000 |
| Tariff Code | 2901100000 |
Safety & GHS
Detailed safety information available in the SDS — see Documents below.
Documents
Safety Data Sheets (SDS)
Available in English, French, German, Italian, Portuguese, 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
- Eicosane, methyl-
- HENEICOSANE
- Heneicosane (Standard)
- Heneicosane; n-Heneicosane; Henicosane;
- henicosan
- Henicosane
Frequently asked questions
What is n-Heneicosane used for?
n-Heneicosane is primarily used as a reference standard in analytical chemistry and as a component in calibration mixtures for gas chromatography.
What is the chemical formula and molecular weight of n-Heneicosane?
The formula is CH3(CH2)19CH3 with a molecular weight of 296.57 g/mol.
How should n-Heneicosane be stored?
It should be stored at ambient temperature, protected from light and moisture.
What grade is available for n-Heneicosane?
Available in analytical grade, suitable for laboratory and calibration purposes.
Can Molekula supply n-Heneicosane in bulk?
Yes, Molekula can supply n-Heneicosane in bulk quantities—please contact our sales team for pricing and availability.
What documentation comes with an order of n-Heneicosane?
Each order includes a Certificate of Analysis (CoA) and Safety Data Sheet (SDS) upon request.
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.