Fungicides containing Halogens

Fungicides containing Halogens 1213 Table 35.8 Most important halogenated triazole fungicides (56-61). 

IPBC Good broad spectrum fungicide Can use in clear formulations Blends well with other biocides Good stability in coatings Can cause colour shifts in coatings More expensive than carbendazim Some leaching possible Contains halogens Newly classified as a sensitiser... 

Five compounds classified as priority pollutants contain an ether moiety and halogen atoms attached to the aryl and alkyl groups. Five pesticides are suspected to contain at least one compound from this class. B/i(2-chloroethyl) ether (BCEE) is used as a raw material in two pesticides BCEE itself functions as a fungicide or bactericide in certain applications. In the other three pesticides, the ethers are suspected to be present as raw material impurities. 

A survey of the new ISO provisionally approved active ingredients for modern crop protection available in the time frame 2000-2006 (February) shows that around 74% of them are halogen-substituted (Br, I < Cl, Cl/F < F). In this time, approximately four times more halogen-containing insecticides acaricides and fungicides, as well as two times more herbicides, were approved than non-halogenated active ingredients. 

It was modeled according to the fungicidal pyrrole natural product dioxapyrro-lomycin [121] and contains three different halogens and/or halogenated groups in the molecule (CF3, 4-Cl-Ph, Br). 

Using PCMC containing fungicides AOX values (adsorbable aorganic halogens) may occur in tannery effluent which may pose a problem (AOX in the effluent is limited in many countries). 

---