Legacy of CIPC: Residues in store fabrics

CIPC residues are long-lasting and can be found in store fabrics and flooring many years after the final application. With the loss of approval, residue persistence will have significant implications for the future.

The Maximum Residue Level (MRL) for CIPC is currently 10 mg/kg. Following the withdrawal of approval, the MRL would normally revert to the Limit of Quantification (LOQ, 0.01 mg/kg). In recognition of the difficulties with residue persistence, AHDB has submitted an application for a temporary MRL (tMRL).

This project is assessing levels of CIPC contamination from UK stores, with a range of historical applications of CIPC to support this application.

In 2018, it was found that in the 11 stores assessed, CIPC was detected at concentration levels of 0.05 mg/kg on average (residue tests performed on tubers, not store fabrics). In the second year of trials, the average levels of CIPC detected were 0.04 mg/kg. Notably, a number of stores, including some in which CIPC was used until very recently, did not exceed the 0.01 mg/kg LOQ threshold. Data from this project was used, as part of a wider European data set, to inform regulators responsible for reviewing the tMRL application.

The Standing Committee on Plants Animals, Food and Feed (SCoPAFF) voted for a temporary Maximum Residue Level of 0.4 ppm for CIPC at the end of September 2020. This new tMRL is expected to take effect in summer 2021.

What does this change mean for you? We’ve updated our CIPC MRL FAQs page in accordance. 

Visit our store cleaning page for further details on decontamination strategies and cleaning guidelines.