This Test Guideline describes an amphibian metamorphosis assay intended to screen substances which may interfere with the normal functioning of the hypothalamo-pituitary-thyroid axis. The assay was validated with the speciesÔøΩXenopus laevis, which is recommended for use in the Guideline. The assay uses three test chemical concentrations and the necessary controls, including a carrier control if necessary. The assay starts with tadpoles at the development stage 51 on the Nieuwkoop and Faber scale and is extended for a duration of 21 days. Four replicate test vessels are used for each treatment level and control(s). After 7 days of exposure, a sub-set of tadpoles from each treatment level is sampled for the measurement of the length of the hind-limb. At termination of 21-day exposure period, developmental stage, snout-to-vent length and hind limb length are measured on all remaining tadpoles. A sub-set of tadpoles from each treatment level is fixed (whole-body or dissected) for histopathology of the thyroid gland.
Arenicola marina sediment study
Corophium volutator acute toxicity
Corophium volutator chronic study
Crustacean Acute: Toxicity Study - Acartia Tonsa or Tisbe battaglia. Determination of acute lethal toxicity to marine copepods.
SANTE 2020/12830 Rev.1.
Mysid Acute (Static and Flow Through)
Oyster Embryo Larval Development Test
Mysid Chronic Toxicity Test
Fish: Chronic: Saltwater - Toxicity Study
Algal Acute Marine - Analytical Chemistry
Algal Acute Marine - Growth Inhibition Study
Melting Point/Melting Range
Hydrolysis as a function of pH