Registration Dossier
Registration Dossier
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EC number: 268-028-8 | CAS number: 67990-05-0
Endpoint summary
Administrative data
Description of key information
No biodegradation is expected.
Additional information
According to the criteria set in Annex XI of REGULATION (EC) No 1907/2006 a study on ready biodegradability is scientifically unnecessary based on the following arguments applied for the Naphtol-AS pigment analogue substances. Since it is generally known that pigments are not or only marginally (bio) degradable, the persistent-criterion is accepted for the members of the Naphtol-AS analogue substance group. Therefore only one biodegradation study was performed. As Naphtol-AS Pigments are of very poor water solubility, rather inherent than ready biodegradability was assessed for Pigment Red 210 in the Modified MITI Test (II) according to OECD 302 C. In this reliable test (reliability category 1) performed compliant to GLP and fulfilling validity criteria of the guideline, after 28 days no biodegradation was observed (mean biodegradation rate: 0 %) while a functional control (aniline) proved the activity of the system. Therefore, the Naphtol-AS Pigments are regarded as not inherently and thus also not readily biodegradable.
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