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The molecular structure of Reaction mass of 2-(3,4-dimethyl-1H-pyrazol-1-yl)succinic acid and 2-(4,5-dimethyl-1H-pyrazol-1-yl)succinic acid is stable in water at neutral and low pH. The molecule contains no hydrolysable functional groups. Therefore, hydrolysis is not considered to be a relevant pathway for this substance in the environment, and further testing on hydrolysis is not necessary. Phototransformation in air is not relevant for this substance, since it is not expected to be found in the atmospheric compartment due to its low vapour pressure (0.002 Pa at 25 °C).