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Division II.6.4.2.2.6

United Kingdom

Original text. Later amendments are not shown.

Organophosphates shall be tested for delayed neurotoxicity in a hen assay that incorporates measurement of neuropathy target esterase (‘NTE’) in brain tissue. Both single exposure (OECD Test Guideline 418f1) and repeated exposure (OECD Test Guideline 419f2) shall be considered. While single dose studies performed according to OECD Test Guideline 418 may only allow identification of a delayed neurotoxicity effect, repeated dose studies (OECD Test Guideline 419) may allow identification of a NO(A)EL or BMDL.

Annotations

Footnotes

f1

OECD Test No 418: Delayed Neurotoxicity of Organophosphorus Substances Following Acute Exposure (http://www.oecd-ilibrary.org/environment/test-no-418-delayed-neurotoxicity-of-organophosphorus-substances-following-acute-exposure_9789264070905-en).

f2

OECD Test No 419: Delayed Neurotoxicity of Organophosphorus Substances: 28-day Repeated Dose Study (http://www.oecd-ilibrary.org/environment/test-no-419-delayed-neurotoxicity-of-organophosphorus-substances-28-day-repeated-dose-study_9789264070929-en).