TCPy or 3,5,6-trichloro-2-pyridinol is a cyclic hydrocarbon, specifically a chlorinated version of 2-pyridone.

Pesticides can be a precursor to TCPy. TCPy is a metabolite of the herbicide triclopyr,[1] and of the insecticides chlorpyrifos and chlorpyrifos-methyl. A study in Massachusetts reported a correlation between exposure to TCPy and lower testosterone levels in men.[2] According to this source, exposure is "widespread" and of "potential public health importance".

References

  1. ^ "Draft Vegetation Management: Triclopyr" (PDF). San Francisco Forest Alliance. Marin Municipal Water District. 2008. Retrieved 12 April 2021.
  2. ^ Meeker, J. D.; Ryan, L.; Barr, D. B.; Hauser, R. (2006). "Exposure to Nonpersistent Insecticides and Male Reproductive Hormones". Epidemiology. 17 (1): 61–68. doi:10.1097/01.ede.0000190602.14691.70. PMID 16357596.