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| | 4,5-Dimethylthiazole Basic information |
| | 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.) | | FEMA | 3274 | 4,5-DIMETHYLTHIAZOLE | | refractive index | n20/D 1.521(lit.) | | 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 | | Odor | at 0.10 % in dipropylene glycol. roasted nutty fishy green boiled shrimp | | Odor Type | fishy | | JECFA Number | 1035 | | BRN | 105694 | | LogP | 2.09 | | CAS DataBase Reference | 3581-91-7(CAS DataBase Reference) | | NIST Chemistry Reference | Thiazole, 4,5-dimethyl-(3581-91-7) |
| | 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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