Difurfuryl Disulfide
Difurfuryl Disulfide is a pale yellow to amber liquid aroma chemical with the formula C₁₀H₁₀O₂S₂ and CAS number 4437-20-1. It is the oxidative dimer of furfuryl mercaptan and carries a softer, longer-lasting profile centred on toasted coffee, roasted onion, and a sweet sulphur depth.
It is widely used in coffee, savory, and meat flavour work to give body and persistence behind the sharper top of free thiols. Dosing in finished food is in the parts-per-billion to low parts-per-million range.
We source bulk Difurfuryl Disulfide from top China manufacturers for our partners. The manufacturer is in Shandong. A smaller requirement can ship in a combined container with other ingredients.
Please send the grade you need, the volume and your destination port, and we will come back with a solution and a price.
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- Packaging
- 250 kg plastic drum or 1,000 kg IBC tote
- ISO 9001
- HACCP
- Halal
- Kosher
Specifications
| Item | Specification |
|---|---|
| Appearance | Pale yellow to amber liquid |
| Odour | Roasted coffee, cooked onion, sweet sulphurous depth |
| Assay (GC) | ≥ 97.0% |
| Furfuryl Mercaptan | ≤ 1.0% |
| Total Related Sulphides | ≤ 2.0% |
| Refractive Index (20 °C) | 1.5850 – 1.6000 |
| Specific Gravity (25/25 °C) | 1.220 – 1.250 |
| Acid Value | ≤ 1.0 mg KOH/g |
| Solubility in Ethanol | Soluble 1:1 in 95% ethanol, clear solution |
| Solubility in Water | Practically insoluble |
| Water Content (Karl Fischer) | ≤ 0.5% |
| Heavy Metals (as Pb) | ≤ 10 mg/kg |
| Lead (as Pb) | ≤ 2 mg/kg |
| Arsenic (as As) | ≤ 1 mg/kg |
| Shelf Life | 12 months in sealed original container, stored under nitrogen |
Common Markets Grades
Difurfuryl Disulfide sells as a neat liquid and in pre-diluted form.
The standard commercial grade is 97 percent minimum assay by gas chromatography, packed in amber glass or lined steel under nitrogen.
Pre-diluted solutions at 1 percent and 10 percent in triacetin, propylene glycol, or refined vegetable oil are widely stocked for flavour compounding.
FCC and FEMA GRAS conforming material is the routine specification for food use. Kosher and Halal certifications exist.
Applications
- Coffee flavours as a sustained roasted body behind furfuryl mercaptan
- Instant and ready-to-drink coffee aroma top-ups
- Mocha and coffee-cocoa flavours
- Roasted onion and cooked allium flavours
- Meat and savory flavours as a roasted sulphur layer
- Bouillon, gravy, and stock flavours
- Snack seasonings for coffee-flavoured or savory profiles
- Dark beer, stout, and roasted malt flavours
- Roasted nut flavours including hazelnut and peanut
- Cocoa and dark chocolate flavours for roasted depth
- Tobacco casing flavours as a roasted sulphur accent
- Plant-based meat analogs for cooked-meat realism
China Manufacturers of Difurfuryl Disulfide
Top Difurfuryl Disulfide manufacturers in China.
Company names and logos are the property of the manufacturers themselves. They are listed here because our own directory records them as producing this ingredient. A listing is not an endorsement by them, and we do not represent them or speak on their behalf.
How We Help Source Difurfuryl Disulfide
Direct Factory Sourcing
We run the whole process: selecting the manufacturer from the top Chinese food ingredient producers, negotiating the price, verifying quality, and coordinating the logistics. You deal with us instead of with several factories at once.
Original Packaging and Documents from the Manufacturer
The manufacturer sends your Difurfuryl Disulfide out of its own factory in the original packing, through to your destination port. The COA, COO, MSDS, TDS and any certifications reach you from the manufacturer as well.
Free Samples and Lead Time
We send 100 to 500 g free for your own laboratory to test and you cover only the courier, usually within 2 to 3 working days. ETD is usually within 7 to 15 days once the order is confirmed, and we check that date against the factory's own manufacturing schedule before we give it to you.
Combined Shipment
We can load Difurfuryl Disulfide together with other ingredients such as Capsicum Oleoresin, Ethyl Maltol and White Pepper into one 20' FCL. If your quantity is small, we can also ship LCL.
Regulatory Status
Difurfuryl Disulfide is approved as a flavouring substance in the major regulated markets.
It carries FEMA GRAS number 3146 in the Flavour and Extract Manufacturers Association inventory.
The European Union lists it in the Union list of flavourings as FL number 15.018, permitted for general flavour use under good manufacturing practice.
The U.S. Food and Drug Administration recognises it as a synthetic flavouring substance under 21 CFR 172.515. JECFA has reviewed the furfuryl-sulphur flavouring group and concluded no safety concern at the very low use levels typical of this ingredient.
Material conforms to the Food Chemicals Codex monograph. Kosher and Halal certifications are routinely provided.
Manufacturing Process
Industrial Difurfuryl Disulfide is produced by controlled oxidative coupling of furfuryl mercaptan.
The standard method bubbles air or oxygen through a solution of furfuryl mercaptan in a polar solvent in the presence of a mild oxidant such as hydrogen peroxide, iodine, or a copper catalyst. The free thiols couple cleanly to form the symmetrical disulfide bond.
Alternative methods use direct oxidation of furfuryl mercaptan with stoichiometric oxidants under careful temperature control, since over-oxidation can give thiosulfinates or sulphonic acid byproducts.
Crude product is purified by short-path vacuum distillation, then filtered and packed under nitrogen in amber containers. Although the disulfide is more storage-stable than the parent thiol, prolonged exposure to light and air will still darken the material over time.
