Dichlone

Dichlone (trade names Phygon and Quintar) is a fungicide and algicide of the quinone class. It is a general use fungicide applied to fruits, vegetables, field crops, ornamentals, and residential and commercial outdoor areas.[1] It is also used to control blue algae.[2]

Dichlone
Names
Preferred IUPAC name
2,3-Dichloronaphthalene-1,4-dione
Identifiers
3D model (JSmol)
ECHA InfoCard 100.003.828
UNII
  • C1=CC=C2C(=C1)C(=O)C(=C(C2=O)Cl)Cl
Properties
C10H4Cl2O2
Molar mass 227.04 g·mol−1
Appearance Yellow crystals[1]
Melting point 193 °C (379 °F; 466 K)[1]
0.1 ppm[1]
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa).
Infobox references

Dichlone is not persistent in soil and has moderate mammalian toxicity.[2]

Dichlone can be manufactured by the chlorination and oxidation of naphthalene.[3]

Synthesis of dichlone from naphthalene

References
  1. "Dichlone (Phygon, Quintar) Chemical Profile". Pesticide Management Education Program, Cornell Cooperative Extension.
  2. "Dichlone". Pesticide Properties DataBase, University of Hertfordshire.
  3. Thomas A. Unger (1996). Pesticide Synthesis Handbook. p. 966. ISBN 0-8155-1853-6.
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