Registration Dossier
Registration Dossier
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EC number: 201-739-3 | CAS number: 87-32-1
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- no hazard identified
Marine water
- Hazard assessment conclusion:
- no hazard identified
STP
- Hazard assessment conclusion:
- no hazard identified
Sediment (freshwater)
- Hazard assessment conclusion:
- no hazard identified
Sediment (marine water)
- Hazard assessment conclusion:
- no hazard identified
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- no hazard identified
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
Environmental fate
Degradation
Readily biodegradable: 74.6% after 28 d (OECD 301 F)
Bioaccumulation
log Kow < - 1.7 (pH 7, 23 °C , OECD 107)
Aquatic acute toxicity
Fish
LC50 (96 h) > 100 mg/L (nominal, OECD 203, D. rerio)
Aquatic invertebrates
EC50 (48 h) > 100 mg/L (nominal, OECD 202, D. magna)
Aquatic algae
ErC50 (72 h) > 100 mg/L (nominal, OECD 201, P. subcapitata)
Aquatic chronic toxicity
Aquatic algae
ErC10 (72 h) > 100 mg/L (nominal, OECD 201, P. subcapitata)
Classification according to CLP
According to the available data for the aquatic hazard of N-Acetyl-DL-tryptophan (CAS 87-32-1) compiled above, no short-term toxicity to aquatic organisms of all three trophic levels (fish, aquatic invertebrates and algae) was recorded and the respective acute effect concentrations are all clearly above 1 mg/L. Furthermore, the substance is readily biodegradable and has a low potential for bioaccumulation. Data for long-term toxicity is available only for algae and no chronic effects were recorded (ErC10 > 100 mg/L). Therefore, the substance is not classified and labelled for environmental hazards, according to the consolidated version of Regulation (EC) No 1272/2008 (dated: 01.01.2017) and further amendments (ATPs).
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