3-chlorotoluene, with the CAS number 108 - 41 - 8, is an important organic chemical compound. It is also known by other names such as m - chlorotoluene. Chemically, it consists of a toluene molecule with a chlorine atom substituted at the meta position on the benzene ring. Its molecular formula is C₇H₇Cl, and the molecular weight is approximately 126.58 g/mol.
Physically, 3 - chlorotoluene is a colorless to pale yellow liquid. It has a characteristic aromatic odor. Its boiling point is around 162 - 165 °C, and the melting point is approximately -48 °C. The density is about 1.08 g/cm³ at 25 °C. It is insoluble in water but soluble in many organic solvents such as ethanol, ether, and benzene.
3 - chlorotoluene has a wide range of applications in various industries. In the pharmaceutical industry, it serves as a key intermediate in the synthesis of many drugs. For example, it can be used in the preparation of certain anti - inflammatory and analgesic drugs. The unique chemical structure of 3 - chlorotoluene allows it to participate in specific chemical reactions, enabling the production of complex drug molecules.
In the dye industry, it is used as a raw material for synthesizing various dyes. The chlorine atom on the molecule can affect the chromophore and auxochrome groups in the dye molecule, thereby influencing the color and properties of the dye. It can be used to manufacture dyes with different colors and fastness properties, meeting the diverse needs of the textile and printing industries.
It also plays an important role in the production of pesticides. By undergoing a series of chemical reactions, 3 - chlorotoluene can be transformed into effective pesticide ingredients, which are used to control pests and diseases in agriculture, ensuring high - yield and high - quality crop production.
When using 3 - chlorotoluene, it is necessary to follow strict safety procedures. First of all, it should be stored in a cool, dry, and well - ventilated place, away from sources of ignition and heat. During handling, wear appropriate personal protective equipment, such as chemical - resistant gloves, goggles, and a lab coat.
In the laboratory or industrial environment, when using 3 - chlorotoluene for chemical synthesis, it should be added slowly and carefully according to the reaction requirements. Appropriate reaction conditions, such as temperature, pressure, and reaction time, should be strictly controlled. It is important to note that 3 - chlorotoluene is flammable, so open flames and sparks should be avoided during its use.
Case 1: Pharmaceutical Synthesis
A pharmaceutical company was synthesizing a new anti - inflammatory drug. They used 3 - chlorotoluene as an intermediate. First, they reacted 3 - chlorotoluene with a specific amine compound under certain temperature and catalyst conditions. Through a series of purification steps, they obtained an important intermediate product. Then, after further reactions and structural modifications, they successfully synthesized the target anti - inflammatory drug. This new drug showed excellent anti - inflammatory effects in pre - clinical trials, which was attributed in part to the unique chemical properties of 3 - chlorotoluene.
Case 2: Dye Production
A dye factory planned to produce a new type of blue dye. They used 3 - chlorotoluene as one of the key raw materials. By reacting 3 - chlorotoluene with other aromatic compounds and coupling agents, they synthesized a dye with good color fastness and bright color. This new dye was widely used in the textile industry, especially for dyeing high - end cotton fabrics, and received good market feedback.
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