Sulfuric acid, C10-12 (even numbered)-alkyl esters, sodium salts

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.12 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:

0.012 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:

1.9 mg/kg sediment dw

Extrapolation method:

equilibrium partitioning method

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.19 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:

0.3 mg/kg soil dw

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

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; log Pow = 1.88 at 25 ºC (OECD 123)

Water solubility: > 450 g/L at 20 ºC (EU Method A.6)

 

Acute toxicity key values of 10-12AS Na (CAS 85049-86-1):

- 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 (growth rate) = 11.5 mg/L (read-across from CAS 142-87-0 and CAS 151-21-3)

 

Chronic toxicity key values of 10-12AS Na (CAS 85049-86-1):

- 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) = 1.2 mg/L (measured concentration, read-across from CAS 142-87-0 and CAS 151-21-3)

- For algae: 72h EC10 (growth rate) = 1.3 mg/L (read-across from CAS 142-87-0 and CAS 151-21-3)

- 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, C10-12AS Na (CAS 85049-86-1) 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 NOEC value was recorded for aquatic invertebrates and reached 1.2 mg/L. C10-12AS Na (CAS 85049-86-1) does not need to be classified and labeled as environmental hazard 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   

 

Classification justification according to DSD:

Based on the data above, C10-12AS Na (CAS 85049-86-1) is considered to be rapidly degradable and has a low potential for bioaccumulation. The acute aquatic toxicity L(E)C50 values are above 1 mg/L for fish, invertebrates and algae. C10-12AS Na (CAS 85049-86-1) does not need to be classified and labeled as environmental hazard according to Directive 67/548/EEC.