Chloroacetyl chloride (also known as chloroacyl chloride or acetyl chloride) is an organic compound. Its properties are as follows:

1. Appearance: Colorless or slightly yellow liquid;
2. Odor: A distinctive pungent smell;
3. Density: 1.40 g/mL;

Chloroacetyl chloride is often used in organic synthesis and has the following applications:

1. As an acylation reagent: It can be used in esterification reactions, where acids react with alcohols to form esters.
2. As an acetylation reagent: It can replace active hydrogen atoms with acetyl groups, such as introducing acetyl functional groups into aromatic compounds;
3. As a chlorinated reagent: It can represent chloride ions to introduce chlorine atoms;
4. It is used for preparing other organic compounds, such as ketones, aldehydes, acids, etc.

The production methods of monochlorinated acetyl chloride usually include the following:

It is prepared by the reaction of acetyl chloride with dichloride, and the reaction products are monochlorinated acetyl chloride and trichloroacetic acid.
C2H4O + Cl2O3 → CCl3COCl + ClOCOOH;
2. Directly react acetic acid with chlorine gas to produce monochlorinated acetyl chloride:
C2H4O + Cl2 → CCl3COCl + HCl.

When using monochlorinated acetyl chloride, the following safety information should be noted

It has a pungent smell and steam, and should be operated in a well-ventilated place.
2. Although it is not flammable, it will react violently when exposed to a fire source, generating toxic gases. It should be kept away from open flames.
3. During use and storage, it is necessary to avoid contact with strong oxidants, alkali, iron powder and other substances to prevent dangerous reactions.
4. It is irritating to the skin, eyes and respiratory system. Gloves, goggles and protective masks should be worn when operating.
5. In case of accidental inhalation or contact, the affected area should be washed immediately. If any discomfort occurs, medical assistance should be sought.