4-Bromo-2-(m-tolyl)thiophene

Physical and chemical properties

(i) Appearance

Usually white to off-white crystalline powder, lighter in color and uniform in high purity. If impurities are present, it may appear light yellow or slightly discolored.

(ii) Melting point

115 - 118℃ (measured by differential scanning calorimetry DSC, the melting point range of different batches of products may fluctuate by ±2℃ due to purity differences)

(iii) Solubility

Slightly soluble in water, with a solubility of less than 0.1 g/100 mL in water at 25℃.

Easily soluble in common organic solvents such as dichloromethane, chloroform, tetrahydrofuran (THF), N,N-dimethylformamide (DMF), etc. In dichloromethane, it can quickly dissolve at room temperature to form a clear solution, with a solubility of more than 50 g/L.

(iv) Stability

It has good stability in a dry environment at room temperature and pressure. However, long-term exposure to air may cause the color to gradually darken due to slow oxidation. ​

It is sensitive to light and may undergo photochemical reactions under light conditions, resulting in structural changes, so it needs to be stored away from light. ​

Avoid contact with strong oxidants, strong acids, strong bases and other substances to prevent chemical reactions and damage to the molecular structure. For example, in a strong alkaline environment, the bromine atoms on the thiophene ring may undergo substitution reactions.