Sulfurol
Sulfurol is a sulphur-nitrogen heterocyclic flavour compound that delivers savory, meaty, and toasted notes. CAS 137-00-8.
The chemical name is 5-(2-hydroxyethyl)-4-methylthiazole (commonly written as 4-methyl-5-(beta-hydroxyethyl)thiazole). Formula C₆H₉NOS, molar mass 143.21 g/mol. The material is a pale yellow to amber viscous liquid.
We source bulk Sulfurol from top China manufacturers for our partners, working with several of them. The manufacturers are 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.
or call +86-21-6858 0751
- Packaging
- 250 kg plastic drum or 1,000 kg IBC tote
- ISO 9001
- HACCP
- Halal
- Kosher
Specifications
Grades / Types Available: Food Grade, Feed Grade
| Item | Specification |
|---|---|
| Appearance | Colourless to yellow liquid |
| Assay | ≥ 97.0% |
| Heavy Metals (as Pb) | ≤ 10 mg/kg |
| Purity (Food Grade) | ≥ 98% |
| Moisture/Loss on Drying | ≤ 1% |
| pH | 5.0 - 7.0 |
| Lead | ≤ 2 ppm |
| Arsenic | ≤ 1 ppm |
| Total Plate Count | ≤ 1000 cfu/g |
| Yeast & Mold | ≤ 100 cfu/g |
Common Markets Grades
Sulfurol trades as one flavour grade at high purity.
The standard specification is 98 percent minimum by GC, with low residual thiazoline and water content. The product is packed in lined steel drums or HDPE pails under nitrogen.
Colour drift to a deeper amber on storage is normal and does not affect performance. Cold, dark storage is recommended to extend shelf life beyond 24 months.
Kosher and Halal certification is widely available. The compound is also sold as a vitamin B1 (thiamine) synthesis intermediate at pharmaceutical grade.
Applications
- Meat flavour bases for beef, chicken, and pork reconstitutions
- Process flavour reactions where it builds roasted and toasted character
- Bouillon, broth, and savory seasoning blends
- Snack seasonings for chips, crackers, and extruded products
- Soy sauce, fish sauce, and fermented condiment flavourings
- Coffee and cocoa flavour systems for a toasted depth
- Bread crust and bakery flavourings
- Pet food palatants for meat character
- Synthesis intermediate for thiamine (vitamin B1)
- Reaction substrate for sulfurol acetate and related ester derivatives
China Manufacturers of Sulfurol
Top Sulfurol manufacturers in China.
Shandong Tianxiang Food Ingredients Co., Ltd.1 ingredient in the directory
Tengzhou Ruiyuan Flavor Co., Ltd.6 ingredients in the directory
Tengzhou Tianshui Bio-Technology Co., Ltd.12 ingredients in the directory
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 Sulfurol
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 Sulfurol 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 Sulfurol 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
Sulfurol is approved as a flavouring substance in major markets.
It carries FEMA GRAS number 3204 and FLAVIS number 15.020. The European Union has it on the Union list of authorised flavourings.
The U.S. Food and Drug Administration recognises it as a synthetic flavouring substance under 21 CFR 172.515. JECFA has evaluated the sulphur-containing heterocyclic flavour group and placed sulfurol in a class of no safety concern at current intake.
As a pharmacopoeial intermediate to thiamine, the compound also appears in pharmaceutical regulatory frameworks under separate quality monographs.
Manufacturing Process
Sulfurol is manufactured by ring synthesis of the thiazole core.
The classical route, developed during the early thiamine synthesis programs, condenses chloroacetone or related α-halo ketones with a thioamide derived from acrylonitrile or β-hydroxyethyl thioamide. Ring closure under controlled conditions gives the thiazole with the methyl and hydroxyethyl substituents in place.
An alternative route builds the heterocycle from 3-chloro-5-hydroxypentan-2-one and thioformamide. Both routes are operated by Asian and European specialty manufacturers, primarily to supply the thiamine industry, with a separate purification stream serving flavour use.
Final purification is by short-path distillation under high vacuum, since the compound is heat sensitive at atmospheric pressure.
