| 4,5-Dimethylthiazole Basic information |
| Product Name: | 4,5-Dimethylthiazole |
| Synonyms: | FEMA NUMBER 3274;FEMA 3274;4,5-dimethyl-thiazol;4 5-DIMETHYLTHIAZOLE 97+%;4,5-Dimethylthiazole,98%;dimethylthiazole,4,5-dimethylthiazole;Thiazole, 4,5-dimethyl-;4,5-DIMETHYL THIAZOLE FEMA NO.3274 |
| 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 | n |
| FEMA | 3274 | 4,5-DIMETHYLTHIAZOLE |
| Fp | 124 °F |
| storage temp. | Sealed in dry,Room Temperature |
| pka | pK1:3.73 (25°C,μ=0.1) |
| form | solid |
| Specific Gravity | 1.070 |
| JECFA Number | 1035 |
| BRN | 105694 |
| CAS DataBase Reference | 3581-91-7(CAS DataBase Reference) |
| NIST Chemistry Reference | Thiazole, 4,5-dimethyl-(3581-91-7) |
| Safety Information |
| 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 |
| MSDS Information |
| Provider | Language |
|---|---|
| 4,5-Dimethylthiazole | English |
| ACROS | English |
| SigmaAldrich | English |
| ALFA | English |
| 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. |
| 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 |
| Raw materials | Formamide |
| Preparation Products | 2,5-Dihydrothiophene |
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