IDENTIFICATION
Common name: Dicofol
Chemical abstracts name: 2,2,2-trichloro-1,1-bis(4-chlorophenyl)ethanol
Type: Acaricides
CAS RN: 115-32-2
M.F.: C14H9Cl5O
Mol Wt: 370.51
PHYSICAL CHEMISTRY
Form (appearance): Pure dicofol is a white crystalline solid. Technical dicofol is a red-brown or amber viscous liquid with an odor like fresh-cut hay
M.P.: 78.5-79.5 C for pure dicofol [1,5]; 50 C for technical dicofo
Boiling point: 225
V.P.: Negligible at room tempera
S.G.: 1.45
Solubility.: 0.8 mg/L @ 25 C, solute in most organic solvent
Stability: Stable to acids but not to alkaline media. Slightly corrosive to metals.
Partition Coefficient: 4.2788
Adsorption Coefficient: 5000 (estimated)
APPLICATION
Formulation types: EC ; WP.
Biochemistry: Dicofol showed a similar pattern of distribution on elimination as DDT but it is more polar and therefore less persistent in the body. In adipose tissue the parent compound was predominant
Mode of action: Produces stimulation of axonal transmission of nervous signals, believed to be related to inhibition of ATPases in the central nervous system (CNS). The signs of toxicity are consistent with CNS depression.
Uses: Dicofol is an organochlorine miticide used on a wide variety of fruit, vegetable, ornamental and field crops. Dicofol is manufactured from DDT. In 1986, use of dicofol was temporarily canceled by the EPA because of concerns raised by high levels of DDT contamination. However, it was reinstated when it was shown that modern manufacturing processes can produce technical grade dicofol which contains less than 0.1% DDT.
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