Registration Dossier
Registration Dossier
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EC number: 282-968-6 | CAS number: 84501-49-5
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.095 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.055 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.009 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 1.35 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.463 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.146 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- PNEC air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.245 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Conclusion on classification
According to Article 13 of Regulation (EC) No. 1907/2006 "General Requirements for Generation of Information on Intrinsic Properties of substances", information on intrinsic properties of substances may be generated by means other than tests e.g. from information from structurally related substances (grouping or read-across), provided that conditions set out in Annex XI are met.
Annex XI, "General rules for adaptation of this standard testing regime set out in Annexes VII to X” states that “substances whose physicochemical, toxicological and ecotoxicological properties are likely to be similar or follow a regular pattern as a result of structural similarity may be considered as a group, or ‘category’ of substances. This avoids the need to test every substance for every endpoint”.
Since the group concept is applied to the members of the alkyl sulfates category, data will be generated from a representative category member to avoid unnecessary animal testing. Additionally, once the group concept is applied, substances will be classified and labeled on this basis.
Classification related key information:
Biodegradation in water: readily biodegradable (OECD 301 B)
Bioaccumulation: no potential to bioaccumulate; log Pow = 1.057 at 20 ºC (OECD 105)
Water solubility: > 500 g/L at 20 ºC (EU method A.6)
Acute toxicity key values for C9-11AS Na (CAS 84501-49-5)
- For fish: 48h LC50 (Cyprinus carpio, pre-larvae mortality) = 13 mg/L (freshwater, nominal concentration, Japanese Industrial Standard JIS K0102, read-across from CAS 142-87-0); 96h LC50 (Cyprinodon variegatus, mortality) = 4.1 mg/L (marine water, measured concentration, ASTM E-35 (1980), read-across from CAS 151-21-3)
- For invertebrates: 48h EC50 (Daphnia magna, immobilization) = 5.5 mg/L (freshwater, nominal concentration, read-across from CAS 151-21-3); 48h EC50 (Artemia salina, mortality) = 3.15 mg/L (marine water, nominal concentrations, read-across from CAS 151-21-3)
- For algae: 72h EC50 (Pseudokirchneriella subcapitata, growth rate) = 8.64 mg/L (read-across from CAS 142-87-0)
Chronic toxicity key values for C9-11AS Na (CAS 84501-49-5)
- For fish: 42d NOEC (Pimephales promelas; mortality and growth) ≥ 1.357 mg/L (measured concentration, read-across from CAS 151-21-3)
- For invertebrates 21d NOEC (Daphnia magna, reproduction) = 1.4 mg/L (measured concentration, read-across from CAS 142-87-0)
- For algae: 72h EC10 (Pseudokirchneriella subcapitata, growth rate) = 0.95 mg/L (read-across from CAS 142-87-0)
- For microorganisms 3h EC50 (activated sludge respiration inhibition) = 135 mg/L (nominal concentration, similar to OECD 209, read-across from CAS 151-21-3)
Classification justification according to CLP:
Based on the data above, C9-11AS Na (CAS 84501-49-5) is considered to be rapidly degradable and has a low potential for bioaccumulation. The acute aquatic toxicity L(E)C50 are above 1 mg/L for fish, invertebrates and algae. Valid chronic toxicity data are available to fish, invertebrates and algae – the lowest chronic value was recorded for aquatic algae and reached the 72-h EC10 value of 0.95 mg/L (thus in the rage of > 0.1 to < 1 mg/L). C9-11AS Na (CAS 84501-49-5) needs to be classified and labeled as environmental hazard Chronic Cat. 3 according to Regulation (EC) No.1272/2008 (CLP) and Regulation (EU) No. 286/2011 (2nd ATP).
M-factor for acute aquatic toxicity: not need to be assigned
M-factor for chronic aquatic toxicity: not need to be assigned
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