- 2,4-Dibromothiophene
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- $1.10 / 1g
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2025-11-18
- CAS:3140-92-9
- Min. Order: 1g
- Purity: 99.00%
- Supply Ability: 100 Tons
- 2,4-Dibromothiophene
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- $0.00 / 1kg
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2025-04-04
- CAS:3140-92-9
- Min. Order: 1kg
- Purity: 98%
- Supply Ability: 1Ton
- 2,4-Dibromothiophene
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- $590.00 / 100g
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2024-02-19
- CAS:3140-92-9
- Min. Order: 1g
- Purity: 98
- Supply Ability: 500 Kg
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| | 2,4-Dibromothiophene Basic information |
| Product Name: | 2,4-Dibromothiophene | | Synonyms: | 2,4-DIBROMOTHIOPHENE;2,4-Dibromothiophene,94%;2,4-DIBROMOTHIOPHENE, 90+%;2,4-DIBROMOTHIOPHENE 96%;2,4-DIBROMOTHIOPHENE,96%;2,4-Dibromothiophene>;Thiophene, 2,4-dibromo-;2,4-Dibromothiophene ISO 9001：2015 REACH | | CAS: | 3140-92-9 | | MF: | C4H2Br2S | | MW: | 241.93 | | EINECS: | 678-717-9 | | Product Categories: | Heterocycle-oher series;Thiophene&Benzothiophene;Thiophens | | Mol File: | 3140-92-9.mol |  |
| | 2,4-Dibromothiophene Chemical Properties |
| Melting point | -26.3°C | | Boiling point | 215°C | | density | 2.157 g/mL at 25 °C | | refractive index | 1.631-1.633 | | Fp | 215°C | | storage temp. | Keep in dark place,Inert atmosphere,2-8°C | | form | liquid | | Specific Gravity | 2.149 | | color | Colorless to Light yellow to Light orange | | Water Solubility | It is insoluble in water. | | BRN | 107651 | | InChI | InChI=1S/C4H2Br2S/c5-3-1-4(6)7-2-3/h1-2H | | InChIKey | WAQFYSJKIRRXLP-UHFFFAOYSA-N | | SMILES | C1(Br)SC=C(Br)C=1 | | CAS DataBase Reference | 3140-92-9(CAS DataBase Reference) |
| Hazard Codes | Xn,Xi,T | | Risk Statements | 36/37/38-20/21/22-41-37/38-25 | | Safety Statements | 36/37/39-26-36-45-39 | | RIDADR | UN2810 | | WGK Germany | 3 | | Hazard Note | Irritant | | HazardClass | 6.1 | | PackingGroup | III | | HS Code | 29349990 | | Storage Class | 6.1C - Combustible acute toxic Cat.3
toxic compounds or compounds which causing chronic effects | | Hazard Classifications | Acute Tox. 3 Oral
Eye Dam. 1
Skin Irrit. 2
STOT SE 3 |
| | 2,4-Dibromothiophene Usage And Synthesis |
| Chemical Properties | clear colorless to light brown liquid | | Uses | 2,4-Dibromothiophene is used as an important raw material and intermediate used in organic Synthesis, pharmaceuticals, agrochemicals and dyestuff. It is also used as an intermediate in organic synthesis. | | Synthesis | 2,3,5-Tribromothiophene (1): 120 g (1.43 mol) of thiophene was added to 240 mL of glacial acetic acid and 687 g (4.30 mol) of Br2 was added dropwise at 5-10 C, stirred at room temperature for 3 h and heated at reflux for 2 h. The residue was then evaporated under vacuum and distilled through a short Vigreux column. Subsequently, the glacial acetic acid was evaporated under vacuum and the residue was distilled through a short Vigreux column under water jet vacuum. Yield: 376.2 g (1.17 mol)1 (82%). 2,4-Dibromothiophene (4): 120 g (0.374 mol) of 2,3,5-tribromothiophene (1) was dissolved in 300 mL of ether, cooled to -30 C under N2, and 234 mL of a n-hexane solution of 6NBuLi (0.374 mol) was added dropwise over a period of 10 min at this temperature, stirred at -30 C for 5 minutes, poured into 1 L of cold water and extracted with ether 3 times. The combined ether phases were washed three times with water, dried with Na2SO4 and evaporated. The residue was fractionated on a 1 mVigreux flask under vacuum. Yield: 60 g (0.248 mol)4 (66%). |
| | 2,4-Dibromothiophene Preparation Products And Raw materials |
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