Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts

Ecotoxicological Summary

Hazard for aquatic organisms

Freshwater

Hazard assessment conclusion:

PNEC aqua (freshwater)

PNEC value:

0.024 mg/L

Assessment factor:

50

Extrapolation method:

assessment factor

PNEC freshwater (intermittent releases):

0.02 mg/L

Marine water

Hazard assessment conclusion:

PNEC aqua (marine water)

PNEC value:

0.002 mg/L

Assessment factor:

500

Extrapolation method:

assessment factor

STP

Hazard assessment conclusion:

PNEC STP

PNEC value:

4 mg/L

Assessment factor:

10

Extrapolation method:

assessment factor

Sediment (freshwater)

Hazard assessment conclusion:

PNEC sediment (freshwater)

PNEC value:

0.767 mg/kg sediment dw

Assessment factor:

1 000

Extrapolation method:

assessment factor

Sediment (marine water)

Hazard assessment conclusion:

PNEC sediment (marine water)

PNEC value:

0.077 mg/kg sediment dw

Assessment factor:

10 000

Extrapolation method:

assessment factor

Hazard for air

Air

Hazard assessment conclusion:

no hazard identified

Hazard for terrestrial organisms

Soil

Hazard assessment conclusion:

PNEC soil

PNEC value:

1.21 mg/kg soil dw

Assessment factor:

100

Extrapolation method:

equilibrium partitioning method

Hazard for predators

Secondary poisoning

Hazard assessment conclusion:

no potential for bioaccumulation

Additional information

Sulfonic acids, C14-16 (even numbered) -alkane hydroxy and C14-16 (even numbered) -alkene, sodium salts is water soluble and has very low volatility. It is nearly completely disposed down the drain. Residual chemicals of this category entering the environment are rapidly and completely biodegraded. Their bioaccumulation potential is low up to a carbon chain length of C16 (BCF < 100). The chemicals of this category are readily biodegradable under aerobic conditions and are effectively removed during wastewater sewer transport and in biological wastewater treatment. These characteristics help to minimize the potential for human and environmental exposure (SIDS, 2009)

Conclusion on classification

Degradation (only key data needed for classification)

Biodegradation: readily biodegradable; 80% (CO₂ evolution) after 28 d (OECD 301B)

 

Bioaccumulation (only key data needed for classification)

Bioaccumulation is expected to be low.

Log Kow: -1.3 (EU Method A.8)

 

Aquatic acute toxicity (for each species only one key data used for classification)

For fish: 96 h, LC50 (Danio rerio): 4.2 mg/L

For aquatic invertebrates: 48 h, EC50 (Acartia tonsa): 2.08 mg/L (100% substance)

For algae/aquatic plant: 72 h, ErC50 (Skeletonema costatum): 1.97 mg/L (100% substance)

 

Aquatic chronic toxicity (for each species only one key information)

For fish:                           no data available on the substance

For aquatic invertebrates: 21 d NOEC (Daphnia magna): 2.42 mg/L (100% substance)

For algae/aquatic plant:    72 h NOErC (Skeletonema costatum): 1.2 mg/L (100% substance)

 

Classification assigned according to DSD

Based on the data above, Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts is considered to be rapidly degradable and has low potential for bioaccumulation (log Kow < 3). The acute aquatic toxicity L(E)C50 is > 1 mg/L for all three trophic levels. Hence, the substance does not need to be classified according to the Directive 67/548/EEC.

 

Classification assigned according to GLP

Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts is considered to be rapidly degradable. Valid chronic toxicity data are available to alga; the lowest NOEC is 1.2 mg/L. Therefore, Sulfonic acids, C14-16 (even numbered)-alkane hydroxy and C14-16 (even numbered)-alkene, sodium salts does not need to be classified and labelled according to the 2nd ATP of the Regulation (EC) No.1272/2008 (CLP).