Molekula
5-Methylquinoxaline
Supplying 4,500+ customers in over 80 countries
ISO 9001:2015 & ISO 14001:2015 certified · Supplying laboratories and industry since 1999 · Listed pack sizes are a starting point — we manufacture, source and repack to the quantity you need
5-Methylquinoxaline is a heterocyclic aromatic compound featuring a quinoxaline core with a methyl substituent, primarily used as a flavouring agent (FEMA 3203) that contributes roasted, nutty, coffee-like notes to food flavours. It appears as a pale solid under ambient storage conditions. CAS 13708-12-8, molecular formula C9H8N2, molecular weight 144.17 g/mol, with a signal word of Warning for handling. Molekula supplies 5-Methylquinoxaline 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
On backorder — expected to ship by 24 November 2026
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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1 g — £30.90 per pack ex VAT · £37.08 inc. VAT
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5 g — £123.00 per pack ex VAT · £147.60 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 Yellow liquid, paste or solid |
| Melting Point | 20°C - 21°C |
| Identification | Conforms to reference |
| Assay | ≥98.0% |
Storage & handling
| Property | Value |
|---|---|
| Storage Temperature | Ambient |
| Flash Point | 107 °C |
| Acidity | Acid |
Literature values
Published physical properties of the substance, not batch specifications.
| Property | Value |
|---|---|
| Melting Point | 20 - 21 °C |
| Boiling Point | 120 °C (15 mmHg) |
| Solubility (other solvents) | Freely soluble in water, organic solvents, oils |
Source: PubChem CID 61670 (Human Metabolome Database (HMDB), Joint FAO/WHO Expert Committee on Food Additives (JECFA))
Identification
| Property | Value |
|---|---|
| SKU | 10923708 |
| CAS Number | 13708-12-8 |
| IUPAC Name | 5-methylquinoxaline |
| EC Number | 237-246-5 |
| Molecular Formula | C9H8N2 |
| Molecular Weight | 144.17 |
| Exact Mass | 144.0687 |
| SMILES | CC1=C2C(=CC=C1)N=CC=N2 |
| InChIKey | CQLOYHZZZCWHSG-UHFFFAOYSA-N |
| InChI | InChI=1S/C9H8N2/c1-7-3-2-4-8-9(7)11-6-5-10-8/h2-6H,1H3 |
| PubChem CID | 61670 |
| REACH Code | Y110 |
| TSCA Listed | Yes |
| HTS Code | 2933.99.8290 |
| Tariff Code | 2933998090 |
Safety & GHS
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Health Hazard
GHS07
Hazard statements
- H315 Causes skin irritation
- H319 Causes serious eye irritation
- H335 May cause respiratory irritation
Precautionary statements
- P261 Avoid breathing dust/fume/gas/mist/vapours/spray
- P280 Wear protective gloves/protective clothing/eye protection/face protection
- P302+352 IF ON SKIN: Wash with soap and water
- P304+341 IF INHALED: If breathing is difficult, remove victim to fresh air and keep at rest in a position comfortable for breathing
- 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, 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.
Quality certificates
Molekula Group is certified to ISO 9001:2015 (quality) and ISO 14001:2015 (environmental management), audited by a UKAS-accredited body. Both certificates are valid to 17 May 2028.
Synonyms
- 5-methyl-1,4-naphthyridine
- 5-Methyl-quinoxalin
- 5(6)-Methylquinoxaline mixture
- 8-methyl-1,4-naphthyridine
- 8-methylquinoxaline
- Epitope ID:547124
- FEMA 3203
- FEMA No. 3203
- Quinoxaline, 5-methyl-
Frequently asked questions
What is 5-Methylquinoxaline commonly used for?
5-Methylquinoxaline is primarily used as a flavour and fragrance material. It is a FEMA-listed flavouring ingredient (FEMA 3203) valued for its roasted, nutty, coffee-like note. It can also serve as a heterocyclic building block in organic synthesis.
What is the chemical formula and molecular weight of 5-Methylquinoxaline?
The chemical formula is C9H8N2, and the molecular weight is 144.17 g/mol.
How should 5-Methylquinoxaline be stored?
Store at ambient temperature in a cool, dry place, away from incompatible substances like strong oxidizers.
What purity grades are available for this product?
Molekula supplies 5-Methylquinoxaline in technical grade and high-purity (98%+) forms, depending on application requirements.
Can Molekula supply 5-Methylquinoxaline in bulk quantities?
Yes, bulk quantities are available upon request—minimum order quantities and packaging options vary based on customer needs.
What documentation is provided with an order of 5-Methylquinoxaline?
Each order includes a Certificate of Analysis (CoA), Material Safety Data Sheet (MSDS), and a Safety Data Sheet (SDS) compliant with global regulations.
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.