Introduction：Basic information about 2,5-Dimethylthiophene CAS 638-02-8, including its chemical name, molecular formula, synonyms, physicochemical properties, and safety information, etc.
2,5-Dimethylthiophene Basic information
| Product Name: | 2,5-Dimethylthiophene |
| Synonyms: | 2,5-DIMETHYLTHIOPHENE;2,5-DIMETHYLTHIOPHENE, 98.5%;2 5-DIMETHYLTHIOPHENE 98+%;2,5-DIMETHYTHIOPHENE;2,5-Dimethylthiophene, 98.50%;Thiophene, 2,5-dimethyl-;2,5-Thioxene;2,5-DiMethylthiophene, 98.5% 25ML |
| CAS: | 638-02-8 |
| MF: | C6H8S |
| MW: | 112.19 |
| EINECS: | 211-313-9 |
| Product Categories: | thiophene Flavor;Building Blocks;Heterocyclic Building Blocks;Thiophenes;Alphabetical Listings;C-D;Flavors and Fragrances;Thiophene&Benzothiophene;Heterocyclic Compounds;Thiophens |
| Mol File: | 638-02-8.mol |
|
2,5-Dimethylthiophene Chemical Properties
| Melting point | -63°C |
| Boiling point | 134 °C/740 mmHg (lit.) |
| density | 0.985 g/mL at 25 °C (lit.) |
| refractive index | n20/D 1.512(lit.) |
| Fp | 75 °F |
| storage temp. | Keep in dark place,Inert atmosphere,Room temperature |
| form | Liquid |
| color | Clear colorless to slightly yellow |
| Specific Gravity | 0.985 |
| Odor | at 0.10 % in propylene glycol. nutty sulfury |
| Odor Type | sulfurous |
| biological source | synthetic |
| Water Solubility | Insoluble in water. Soluble in alcohol, ether and benzene. |
| BRN | 106450 |
| Major Application | flavors and fragrances |
| InChI | 1S/C6H8S/c1-5-3-4-6(2)7-5/h3-4H,1-2H3 |
| InChIKey | GWQOOADXMVQEFT-UHFFFAOYSA-N |
| SMILES | Cc1ccc(C)s1 |
| LogP | 2.523 (est) |
| CAS DataBase Reference | 638-02-8(CAS DataBase Reference) |
| NIST Chemistry Reference | Thiophene, 2,5-dimethyl-(638-02-8) |
| EPA Substance Registry System | 2,5-Dimethylthiophene (638-02-8) |
Safety Information
| Hazard Codes | Xn,F,Xi |
| Risk Statements | 10-37-20/22 |
| Safety Statements | 23-24/25-16-36-33-29-7/9-3/7/9 |
| RIDADR | UN 1993 3/PG 3 |
| WGK Germany | 3 |
| HazardClass | 3 |
| PackingGroup | II |
| HS Code | 29349990 |
| Storage Class | 3 - Flammable liquids |
| Hazard Classifications | Flam. Liq. 3 |
2,5-Dimethylthiophene Usage And Synthesis
| Chemical Properties | clear colorless to slightly yellow liquid |
| Uses | 2,5-Dimethylthiophene is used as an intermediate in organic synthesis. |
| Definition | ChEBI: 2,5-Dimethylthiophene is a member of thiophenes. |
| Synthesis Reference(s) | The Journal of Organic Chemistry, 20, p. 1363, 1955 DOI: 10.1021/jo01127a012 |
| General Description | 2,5-Dimethylthiophene is a volatile flavoring compound that has been identified in the essential oil of onion. It is reported to be one of the sulfur-containing compounds formed via Maillard reaction/Strecker degradation of cysteine with furaneol. |
2,5-Dimethylthiophene Preparation Products And Raw materials
| Raw materials | Carbon tetrachloride-->Phosphorus pentasulfide-->2,5-Hexanedione |
| Preparation Products | Thiophene(SIV) (9CI)-->5-Methylthiophene-2-carboxaldehyde-->2,5-Dimethylthiophene-3-boronic acid-->2-Methylthiophene-->1-(2,5-dimethylthiophen-3-yl)-2-methylpropan-1-one-->3-[2-(2,5-dimethylthiophen-3-yl)cyclopenten-1-yl]-2,5-dimethylthiophene-->CHEMBRDG-BB 4012561-->2,5-Dimethyl-thiophene-3,4-dicarbonitrile |
