Registration Dossier
Registration Dossier
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EC number: 293-917-2 | CAS number: 91648-55-4
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.02 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.052 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.002 mg/L
- Assessment factor:
- 100
- Extrapolation method:
- assessment factor
- PNEC marine water (intermittent releases):
- 0.005 mg/L
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 550 mg/L
- Assessment factor:
- 1
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 6.75 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.675 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Air
- Hazard assessment conclusion:
- no hazard identified
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 1.363 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 for C16-20AS Na (CAS 91648-55-4):
Biodegradation in water: 90-100% after 28 days (OECD 301 B)
Bioconcentration: low potential to bioaccumulate; log Pow = 3.985
Water solubility: 0.92 g/L
Acute toxicity key values for C16-20AS Na (CAS 91648-55-4):
- For fish: 96h LC50 (Danio rerio, mortality) = 5.2 mg/L (nominal concentration, ISO 7346-1, read across from CAS 68955-20-4)
- For invertebrates: 48h EC50 (Daphnia magna, mobility) = 37.91 mg/L (WAF, OECD 202)
- For algae: 72h EC50 (Desmodesmus subspicatus, growth rate) = 34 mg/L (nominal concentration, DIN 38412 (9), read-across from CAS 68955-20-4)
Chronic toxicity key values for C16-20AS Na (CAS 91648-55-4):
- For fish: 14d NOEC (Pimephales promelas, mortality and growth) = 1.65 mg/L (nominal concentration, OECD 204, read-across from CAS 68955-20-4)
- For invertebrates: 7d NOEC (Ceriodaphnia dubia, reproduction) = 0.204 mg/L (measured concentration, EPA-600/489/001, read-across from CAS 1120-01-1)
- For algae: 72h EC10 (Desmodesmus subspicatus, biomass) = 19 mg/L (nominal concentration, DIN 38412 (9), read-across from CAS 68955-20-4)
Classification justification according to CLP:
Based on the data above, C16-20AS Na (CAS 91648-55-4) 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 NOEC is 0.204 mg/L (thus in a range > 0.1 to < 1 mg/L) for aquatic invertebrates. C16-20AS Na (CAS 91648-55-4) needs to be classified and labeled as environmental hazard Chronic Cat. 3 according to Regulation (EC) No.1272/2008 (CLP) and further amendments (ATPs).
M-factor for acute aquatic toxicity: not need to be assigned
M-factor for chronic aquatic toxicity: not need to be assigned
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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