(E)-Methyl 4-bromocrotonate（CAS# 6000-00-6)

Trans-4-bromo-2-butenoic acid methyl ester is an organic compound with the chemical formula C6H9BrO2. The following is information about the properties, use, preparation and safety of the compound:Nature:
Trans-4-bromo-2-butenoic acid methyl ester is a colorless liquid with a special smell. It has a density of about 1.49g/cm3, a boiling point of about 171-172°C, and a flash point of about 67°C. It is insoluble in water at room temperature, but it is miscible with organic solvents such as ethanol, ether, etc.

Use:
Trans-4-bromo-2-butenoic acid methyl ester is mainly used as an intermediate in organic synthesis reactions. It can be used for the synthesis of other organic compounds, for example for the synthesis of compounds in medicinal chemistry and pesticide chemistry.

Preparation Method:
Trans-4-bromo-2-butenoic acid methyl ester is usually prepared by bromination reaction and esterification reaction. Butene is first reacted with bromine to give 4-bromo-2-butene, which is then esterified with methanol to give trans-4-bromo-2-butenoic acid methyl ester.

Safety Information:
Trans-4-bromo-2-butenoic acid methyl ester is a kind of organic solvent and chemical raw material, which has certain danger. It is irritating and corrosive, and contact with the skin, eyes or respiratory tract can cause irritation and injury. Direct contact should be avoided during use, and appropriate respiratory protection and protective clothing should be taken. In addition, care should be taken to avoid contact with oxidants and strong acids during storage to prevent dangerous reactions. If you need to use this compound, please operate in a safe facility and follow the relevant safe working procedures.