Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.
The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 265-232-9 | CAS number: 64771-71-7 A combination of normal paraffins having carbon numbers predominantly greater than C10 obtained by urea adduction or molecular sieve processes.
Endpoint summary
Administrative data
Description of key information
Additional information
The substance Paraffins (petroleum), normal C>10 contains a range of carbons between C10 and C20. Its ecotoxicological properties were investigated using a category approach (a read across from two categories: C9 -C14, aliphatics, <= 2% aromatics and C14 -C20, aliphatics, <= 2% aromatics).
Short-term toxicity to fish
Substances identified as C10 -C13 hydrocarbons, C11 -C14 hydrocarbons and C14 -C18 hydrocarbons, each containing n-alkanes, isoalkanes and cyclics, with <2% aromatics, are not expected to demonstrate acute fish toxicity. Based on these results, the substance Paraffins (petroleum), normal C>10 (with a range of carbon covered by the studied substances), is not expected to demonstrate an acute fish toxicity.
Long-term toxicity to fish
Petrotox calculations determined that for all substances from "Hydrocarbons, C14 -C20 and C9 -C14, aliphatics (<= 2% aromatics)" were not toxic to fish. Results of computer modelling to estimate chronicity in a 28 -day freshwater fish study, based on growth, show that the substance will not produce toxicity at or below its maximum attainable water solubility.
Short-term toxicity to aquatic invertebrates
The normal paraffin substances in this category, including n-decane, n-undecane, n-dodecane, n-tridecane, n-tetradecane, and a substance containing a range of normal paraffins identified as hydrocarbons, C11-C14, containing n-alkanes with less than 2% aromatics, are not expected to demonstrate acute invetebrate toxicity based on results of studies with freshwater and marine invertebrates, including D. magna, C. marinus, and Mysidopsis bahia. Each of these substances has been shown not to demonstrate effects, as measured by immobility or mortality in 48- or 96-hour toxicity studies at the highest loading levels tested, which have ranged from 1000 to 10,000 mg/L. Therefore, the substance Paraffins (petroleum), normal C>10, is expected not to demonstrate short-term toxicity to aquatic invertebrates.
Long-term toxicity to aquatic invertebrates
Results of computer modelling to estimate chronicity in a 21-day freshwater invertebrate study, based on reproduction, show that this substance will not produce toxicity at or below its maximum attainable water solubility. These results were confirmed by two studies with C14 -C17 and C12 -C15, n-alkanes, that demonstrate that no toxic effect was obtained with 100% WAF corresponding to 70 mg/L.
Toxicity to aquatic algae
A study with the substance Hydrocarbons, C11 -C14, n-alkanes, <2% aromatics, did not showed an algal growth inhibition up to a concentartion of 10,000 mg/l for 72h. Therefore, the substance Paraffins (petroleum), normal C>10, is not expected to inhibit algal growth.
Toxicity to microorganisms
The substance has been showed to be readily biodegradable.Therefore, it is not toxic to microorganisms.
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.
Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
