Registration Dossier
Registration Dossier
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EC number: 266-925-9 | CAS number: 67701-01-3 This substance is identified by SDA Substance Name: C12-C18 alkyl carboxylic acid and SDA Reporting Number: 16-005-00.
Ecotoxicological Summary
Administrative data
Hazard for aquatic organisms
Freshwater
- Hazard assessment conclusion:
- PNEC aqua (freshwater)
- PNEC value:
- 0.031 mg/L
- Assessment factor:
- 10
- Extrapolation method:
- assessment factor
- PNEC freshwater (intermittent releases):
- 0.036 mg/L
Marine water
- Hazard assessment conclusion:
- PNEC aqua (marine water)
- PNEC value:
- 0.003 mg/L
- Assessment factor:
- 100
STP
- Hazard assessment conclusion:
- PNEC STP
- PNEC value:
- 912 mg/L
- Assessment factor:
- 1
- Extrapolation method:
- assessment factor
Sediment (freshwater)
- Hazard assessment conclusion:
- PNEC sediment (freshwater)
- PNEC value:
- 1.67 mg/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Sediment (marine water)
- Hazard assessment conclusion:
- PNEC sediment (marine water)
- PNEC value:
- 0.167 ng/kg sediment dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for air
Hazard for terrestrial organisms
Soil
- Hazard assessment conclusion:
- PNEC soil
- PNEC value:
- 0.314 mg/kg soil dw
- Extrapolation method:
- equilibrium partitioning method
Hazard for predators
Secondary poisoning
- Hazard assessment conclusion:
- no potential for bioaccumulation
Additional information
Studies on aquatic organisms are available for member of the fatty acid category. For the fatty acid mixture, C12 -18, no studies are available. Thus, read-across is performed to studies conducted with the pure homologues which are contained (> 10%) in the mixture. Lauric acid (C12 - CAS 143 -07 -7) is the most acute toxic and myristic acid (C14 - CAS 544 -63 -8) the most chronic toxic homologue of the mixture. PNEC (freshwater and marine)-calculations are based on LC50/NOEC-values available for these constituents. In case of PNECstp the EC10 of a microorganism study conducted with octanoic acid (C8) is used. PNECsediment and PNECsoil are based on equilibrium partitioning method on the basis of freshwater and marine PNEC-values. Due to the low potential for bioaccumulation, PNECoral is not determined.
Conclusion on classification
Daphnids were found to be the most sensitive aquatic species in acute tests conducted with lauric acid (C12 - CAS 143 -07 -7). The EC50 (72 h) is determined to be 3.6 mg/L and the substance is readily biodegradable. Thus CAS 67701-01 -3 is not classified according to the Directive 67/548/EEC and the GHS Regulation (EC) No. 1272/2008.
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