4,5-Dimethylthiazole
4,5-Dimethylthiazole
CAS: 3581-91-7
Molecular Formula: C5H7NS
4,5-Dimethylthiazole - Names and Identifiers
| Name | 4,5-Dimethylthiazole |
| Synonyms | FEMA 3274 BRN 0105694 FEMA No. 3274 FEMA NUMBER 3274 4,5-dimethyl-thiazol 4,5-Dimethylthiazole 4,5-Dimethyl thiazole Thiazole, 4,5-dimethyl- 4,5-dimethyl-1,3-thiazole 4,5-DIMETHYL THIAZOLE FEMA NO.3274 dimethylthiazole,4,5-dimethylthiazole 4-27-00-00986 (Beilstein Handbook Reference) |
| CAS | 3581-91-7 |
| EINECS | 222-703-3 |
| InChI | InChI=1/C5H7NS/c1-4-5(2)7-3-6-4/h3H,1-2H3 |
4,5-Dimethylthiazole - Physico-chemical Properties
| Molecular Formula | C5H7NS |
| Molar Mass | 113.18 |
| Density | 1.07 g/mL at 25 °C (lit.) |
| Melting Point | 83-84 C |
| Boling Point | 158 °C/742 mmHg (lit.) |
| Flash Point | 124°F |
| JECFA Number | 1035 |
| Vapor Presure | 3.46mmHg at 25°C |
| Appearance | Crystalline powder |
| Specific Gravity | 1.070 |
| BRN | 105694 |
| pKa | pK1:3.73 (25°C,μ=0.1) |
| Storage Condition | Sealed in dry,Room Temperature |
| Refractive Index | n20/D 1.521(lit.) |
| MDL | MFCD00005336 |
| Physical and Chemical Properties | Density 1.07 boiling point 158 ° C. (742 torr) refractive index 1.52-1.522 flash point 51°C |
| Use | Used as a food additive |
4,5-Dimethylthiazole - Risk and Safety
| Risk Codes | R10 - Flammable R22 - Harmful if swallowed R37/38 - Irritating to respiratory system and skin. R41 - Risk of serious damage to eyes R36/37/38 - Irritating to eyes, respiratory system and skin. |
| Safety Description | S16 - Keep away from sources of ignition. S26 - In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S39 - Wear eye / face protection. S37/39 - Wear suitable gloves and eye/face protection S36/37/39 - Wear suitable protective clothing, gloves and eye/face protection. |
| UN IDs | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| RTECS | XJ4380000 |
| HS Code | 29349990 |
| Hazard Class | 3 |
| Packing Group | III |
4,5-Dimethylthiazole - Upstream Downstream Industry
| Raw Materials | Formamide |
4,5-Dimethylthiazole - Nature
Open Data Verified Data
liquid, hygroscopic. Boiling point 144~145 ℃(95. 8kPa),70~73 ℃(6. 66kPa), relative density 1. 0562 (15 ℃), refractive index 1.5091. Soluble in alcohol, ether and cold water, slightly less soluble in hot water.
Last Update：2024-01-02 23:10:35
4,5-Dimethylthiazole - Preparation Method
Open Data Verified Data
from acetamide and phosphorus pentasulfide reaction, and then with a chloroacetone condensation. In the process, the anhydrous benzene is added into the reaction flask first, then the mixture of acetamide and powdered phosphorus pentasulfide is added and heated in a water bath; Then the benzene solution of chloroacetone is added and refluxed for 30min; then water was added to the reaction mixture, I .e., the layers were separated, the reddish liquid in the upper layer was discarded, and the lower liquid was made alkaline by adding sodium hydroxide, followed by ether extraction. The extract was dried over anhydrous sodium sulfate, filtered, the 140-150 ° C. Fraction was collected by atmospheric distillation, and the collected fraction was re-distilled to collect the 143-145 ° C. Fraction, I .e., 2, 4-methylthiazole.
Last Update：2022-01-01 10:57:31
4,5-Dimethylthiazole - Use
Open Data Verified Data
This product can be used in organic synthesis and the production of pharmaceuticals.
Last Update：2022-01-01 10:57:30
4,5-Dimethylthiazole - Reference Information
| FEMA | 3274 | 4,5-DIMETHYLTHIAZOLE |
| NIST chemical information | Information provided by: webbook.nist.gov (external link) |
| use | as food additive |
Last Update：2024-04-09 02:00:08
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Raw Materials for 4,5-Dimethylthiazole