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EC number: 485-420-6
CAS number: 182918-16-7
Not readily biodegradable according to OECD criteria, poorly biodegradable.
Data on biodegradation of an analogous substance (EC 440-520-9; CGX UVA
006) are available. CG 35-1597 and the analogous substance belong both
to the Triphenyl-triazines (same common functional group) and CG 35-1597
is an intermediate for the synthesis of CGX UVA 006. Triphenyl-triazine
are large, bulky, non-polar organic compounds used as UV-filter in
varnishes and plastics.
CGX UVA 006 only differs from CG 35-1597 by a substituent at one phenol
ring. It has an etherified branched carbonyl chain (C8) in para position
instead of a hydroxyl group. The different substituents do not have any
significant influence on the behaviour of the substances in the
environment. Both substances have a very low water solubility (CG
35-1597 <0.0048 mg/L; CGX UVA 006 <0.73 mg/L), a low vapour pressure (CG
35-1597 = 5.3 E-19 Pa; CGX UVA 006 = 5.4 E-22 Pa), a high logPow above 3
(CG 35-1597 = 8.8; CGX UVA 006 = 10.7), a high molecular weight above
450 (CG 35-1597 = 493.565; CGX UVA 006 = 605.78), are not readily
biodegradable and due to the low water solubility hydrolysis is not
expected. Both substances are stable and no degradation/breakdown
products will occur in the environmental compartments. Due to the
slightly higher water solubility and the slightly higher logPow of CGX
UVA 006 the read across is justified and regarded as worst-case.
A detailed risk assessment and read across justification was send to the
german chemical agency BAuA in 2007 with the purpose of a national
substance notification (VIIA). The read across justification was
accepted by the national agency.
The readily biodegradability of
CGX UVA 006 was tested in a GLP guideline study conducted in compliance
with OECD 301B. Based on the determined CO2 evolution no biodegradation
within 28 days was detected (RCC Ltd., 2002). The result is supported by
a second study set up according to OECD guideline 301C. The O2
consumption of activated sludge was recorded for 28 days and a
degradation rate of 0 -3 % was determined (Ciba Specialty Chemicals
CG 35-1597 was also not readily biodegradable according to an EPI Suite
calculation using BIOWIN v4.10 (US EPA EPIWEB v4.1).
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.
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