Registration Dossier

Administrative data

Hazard for aquatic organisms

Hazard for air

Hazard for terrestrial organisms

Hazard for predators

Additional information

Conclusion on classification

Environmental fate and pathways


Not readily biodegradable (2 – 18% in 28 d, OECD 301 B)


log Pow = 0.6 (20.1 °C, pH 7, OECD 107)

Aquatic short-term toxicity


LC50 (96 h) > 100 mg/L (nominal, OECD 203, C. carpio)

Aquatic invertebrates

EC50 (48 h) > 100 mg/L (nominal, OECD 202, D. magna)


ErC50 (72 h) > 100 mg/L (nominal, OECD 201, P. subcapitata)


Aquatic long-term toxicity


NOErC50 (72 h) ≥ 100 mg/L (nominal, OECD 201, P. subcapitata)


Conclusion on CLP

Based on the available data compiled above, N-ethylcaprolactam (CAS No. 19797-08-1) is not classified and labelled as short-term or long-term hazardous to the aquatic environment, according to the latest consolidated version of Regulation (EC) No 1272/2008 (01.03.2018) and further amendments (ATPs).