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: 946-615-6
CAS number: -
The registered UVCB substance as a whole is considered to have very low
water solubility (<< 1 mg/L), based on representative constituents of
the major fraction, having solubility in the range 4.7x10-11 to 5.1x10-7
mg/L at 25°C (calculated values).
Considering the registered substance is an UVCB, experimental testing
was considered not feasible, due to limited identification of the
composition, and analytical issues expected.
Therefore, a constituent-based, Weigh-of-Evidence approach, was prefered.
Two constituents, of a different chemical family, were targeted, as
For the very major, non-volatile, fraction, direct identification was
not achieved, due to technical difficulties. The starting material,
beeswax is a complex mixture of saturated and unsaturated linear and
complex esters (27 to 40% monoesters, 9 to 23 % hydroxymonoesters, 7 to
16% diesters, 3.9% hydroxydiesters), 11 to 28% hydrocarbons, 1 to 18%
saturated, unbranched free fatty acids, 4 to 8% of other substances and
< 0.3% free fatty alcohols (EFSA Journal (2007) 615, 1-28). The
registered substance Concrete of honeycomb cells of the bee by hexane
extraction is anticipated to contain selectively extracted constituents.
Hexane being a non-polar solvent, non-hydroxy esters and hydrocarbons
are supposed to be predominant in the concrete. Based on the same data
source, oleyl palmitate and heptacosane were selected, as major
component in their family. No published data was available; predictions
were calculated with both EpiSuite models, and found very low: 4.7x10-11
and 5.1x10-7 mg/L for the ester, 2.8x10-9 and 3.8x10-7 mg/L for the C27
No data is presented for the constituents of the volatile phase, as
their amount is considered negligible with regard to the assessement of
the substance as a whole. Moreover, the identified constituents are
similarly alkanes and alkenes, so anticipated to be of very low
No single key value was derived for the UVCB substance, result expressed
as a range was prefered, having more scientific sense.
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.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again