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CAS 117-21-5

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3-Chlorophthalic anhydride

Description:
3-Chlorophthalic anhydride, with the CAS number 117-21-5, is a chemical compound characterized by its anhydride functional group derived from phthalic acid. It appears as a white to light yellow crystalline solid and is known for its reactivity, particularly in electrophilic aromatic substitution reactions due to the presence of the chlorine atom on the aromatic ring. This compound is primarily used in the synthesis of various chemical intermediates, including dyes, pigments, and resins. It exhibits moderate solubility in organic solvents such as acetone and chloroform, but is generally insoluble in water. 3-Chlorophthalic anhydride can undergo hydrolysis to form 3-chlorophthalic acid in the presence of water. Safety precautions are necessary when handling this substance, as it can be irritating to the skin, eyes, and respiratory system. Proper storage in a cool, dry place away from incompatible materials is essential to maintain its stability and prevent degradation.
Formula:C8H3ClO3
InChI:InChI=1S/C8H3ClO3/c9-5-3-1-2-4-6(5)8(11)12-7(4)10/h1-3H
InChI key:InChIKey=UERPUZBSSSAZJE-UHFFFAOYSA-N
SMILES:ClC1=C2C(C(=O)OC2=O)=CC=C1
Synonyms:
  • 1,3-Isobenzofurandione, 4-chloro-
  • 3-Chlorophthalic acid anhydride
  • 4-Chloro-1,3-isobenzofurandione
  • 4-Chloro-2-Benzofuran-1,3-Dione
  • 4-Chloroisobenzofuran-1,3-dione
  • Chlorphthalidone
  • NSC 122937
  • Phthalic anhydride, 3-chloro-
  • 3-Chlorophthalic anhydride
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