Registration Dossier
Registration Dossier
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EC number: 273-179-8 | CAS number: 68952-95-4 A complex combination of fatty acids, neutral vegetable-oil, proteins, and other minor components produced by boiling vegetable-oil soapstock with mineral acid and, optionally, further separating the oil phase acidulated soapstock from the aqueous phase.
Sediment toxicity
Administrative data
Link to relevant study record(s)
Description of key information
Based on the high estimated Koc values, ‘soaps, stocks, vegetable oil, acidulated’ is expected to adsorb to suspended solids and sediment. However, due to low water solubility and ready biodegradation potential of the substance together with the low estimated BCF values of the constituents (ranging from 3.85-40 L/kg), the bioavailability as well as bioaccumulation in sediment organisms will be limited. Also, similar to mammals, the major constituents (i.e., glycerides and fatty acids) of the substance are known to be metabolised in fish and used as an essential energy source for growth and reproduction (Tocher, 2003).
Considering the above information coupled together with the overall low toxicity potential of the substance in aquatic organisms and mammals (see section 7.1 and 5 respectively), no toxicity to soil organisms or terrestrial environment is expected. This is further supported by the absence of toxicity observed in a 14-d acute earthworm toxicity study conducted with a 'glycerides, C14-18 and C16-18-unsatd. mono-, di- and tri-‘ which has similar chain length distribution as the glyceride constituent of ‘soaps, stocks, vegetable oil, acidulated’.
Therefore no further testing is considered to be required, in accordance with Annex IX, Section 9, Column 2 of the REACH legislation. Nevertheless, as described in Chapter 7.6, PNEC sediment has been derived using the Equilibrium Partition Method to conduct a risk assessment for the sediment compartment.
Key value for chemical safety assessment
Additional information
Based on the high estimated Koc values, 'Soaps, stocks, vegetable oil, acidulated’ is expected to adsorb to suspended solids and sediment. However, due to low water solubility and ready biodegradation potential of the substance together with the low estimated BCF values of the constituents (ranging from 3.85-660 L/kg), the bioavailability as well as bioaccumulation in sediment organisms will be limited. Also, similar to mammals, the major constituents (i.e., glycerides and fatty acids) of the substance are known to be metabolised in fish and used as an essential energy source for growth and reproduction (Tocher, 2003).
Considering the above information coupled together with the overall low toxicity potential of the substance in aquatic organisms and mammals (see section 7.1, 7.2.1 and 5 respectively), no toxicity to soil organisms or terrestrial environment is expected. This is further supported by the absence of toxicity observed in a 14-d acute earthworm toxicity study conducted with a 'glycerides, C14-18 and C16-18-unsatd. mono-, di- and tri-‘ which has similar chain length distribution as the glyceride constituent of ‘Soaps, stocks, vegetable oil, acidulated'. Therefore no further testing is considered to be required, in accordance with Annex IX, Section 9, Column 2 of the REACH legislation. Nevertheless, as described in Chapter 7.6, PNEC sediment has been derived using the Equilibrium Partition Method to conduct a risk assessment for the sediment compartment.
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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