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- 4,5-Dimethylthiazole
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2026-06-30
- CAS:3581-91-7
- Min. Order: 1KG
- Purity: 98.0%
- Supply Ability: 10000KGS
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| | 4,5-Dimethylthiazole Basic information |
| Product Name: | 4,5-Dimethylthiazole | | Synonyms: | FEMA NUMBER 3274;4,5-dimethyl-thiazol;4 5-DIMETHYLTHIAZOLE 97+%;4,5-Dimethylthiazole,98%;dimethylthiazole,4,5-dimethylthiazole;4,5-DIMETHYL THIAZOLE FEMA NO.3274;4,5-DIMETHYL-1,3-THIAZOLE;4,5-DIMETHYLTHIAZOLE | | CAS: | 3581-91-7 | | MF: | C5H7NS | | MW: | 113.18 | | EINECS: | 222-703-3 | | Product Categories: | thiazole Flavor;Alphabetical Listings;C-D;Flavors and Fragrances;Building Blocks;Heterocyclic Building Blocks;Heterocyclic Compounds;Thiazoles | | Mol File: | 3581-91-7.mol |  |
| | 4,5-Dimethylthiazole Chemical Properties |
| Melting point | 83-84 C | | Boiling point | 158 °C/742 mmHg (lit.) | | density | 1.07 g/mL at 25 °C (lit.) | | refractive index | n20/D 1.521(lit.) | | FEMA | 3274 | 4,5-DIMETHYLTHIAZOLE | | Fp | 124 °F | | storage temp. | Sealed in dry,Room Temperature | | form | solid | | pka | pK1:3.73 (25°C,μ=0.1) | | Specific Gravity | 1.070 | | Odor | at 0.10 % in dipropylene glycol. roasted nutty fishy green boiled shrimp | | Appearance | Colorless to light yellow Liquid | | Odor Type | fishy | | biological source | synthetic | | JECFA Number | 1035 | | BRN | 105694 | | Major Application | flavors and fragrances | | InChI | 1S/C5H7NS/c1-4-5(2)7-3-6-4/h3H,1-2H3 | | InChIKey | UWSONZCNXUSTKW-UHFFFAOYSA-N | | SMILES | Cc1ncsc1C | | LogP | 2.09 | | CAS DataBase Reference | 3581-91-7(CAS DataBase Reference) | | NIST Chemistry Reference | Thiazole, 4,5-dimethyl-(3581-91-7) |
| Hazard Codes | Xn,Xi,F | | Risk Statements | 10-22-37/38-41-36/37/38 | | Safety Statements | 16-26-39-37/39-36/37/39 | | RIDADR | UN 1993 3/PG 3 | | WGK Germany | 3 | | RTECS | XJ4380000 | | HazardClass | 3 | | PackingGroup | III | | HS Code | 29349990 | | Storage Class | 3 - Flammable liquids | | Hazard Classifications | Acute Tox. 4 Oral
Eye Dam. 1
Flam. Liq. 3
Skin Irrit. 2
STOT SE 3 |
| | 4,5-Dimethylthiazole Usage And Synthesis |
| Chemical Properties | 4,5-Dimethylthiazole is a colorless to light yellow liquid that has a roasted nutty, meaty, boiled poultry-like odor. | | Occurrence | Reported found in peanuts, toasted oats, malt, peach, pork, coffee, krill, shrimp and scallops | | Uses | 4,5-Dimethylthiazole was used in the preparation of 4-(bromomethyl)-5-(dibromomethyl)thiazole. | | Preparation | From methyl-α-bromoethyl ketone; by oxidation of 2-mercaptothiazoles with hydrogen peroxide in aqueous solution;
from 2-mercapto-4,5-dimethylthiazole. | | Definition | ChEBI: 4,5-Dimethylthiazole is a member of thiazoles. | | Aroma threshold values | Detection: 470 ppb | | Taste threshold values | Taste characteristics at 5 ppm: fishy, amine and pyridine-like with shrimp and savory nuances | | Synthesis Reference(s) | The Journal of Organic Chemistry, 6, p. 764, 1941 DOI: 10.1021/jo01205a011 | | General Description | 4,5-Dimethylthiazole is a thiazoles compounds that containing a thiazole ring substituted at positions 4 and 5 only. Radical bromination of 4,5-dimethylthiazole using N-bromosuccinimide in the presence of 2,2′-azobisisobutyronitrile yields mono-, tri- and tetrabromo compounds. |
| | 4,5-Dimethylthiazole Preparation Products And Raw materials |
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