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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Classification & Labelling & PBT assessment

PBT assessment

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Administrative data

PBT assessment: overall result

Type of composition:
legal entity composition of the substance
State / form:
solid: particulate/powder
Reference substance:
Reference substance:
Reference substance:
Reference substance:
PBT status:
the substance is not PBT / vPvB

The result of biodegradation test shows that CJ303 fails screening (ready biodegradation) studies. However, published literature, including Environmental Hazard Assessment of Azo-colorants by the Danish Environmental Protection Agency Several references found to suggest long term degradation by biotic and abiotic processes. Therefore, the substance is considered P not “vP.”


The substance is assessed as not ‘B’ based on the high solubility in water and low partition coefficient. In addition, there is no evidence that this class of substance will readily absorb across membranes. The Log Kow is measured to be < -4.0.


The substance is not considered ‘T’. The results of acute toxicity (LC50/EC50) to aquatic organisms with acute effects > 100 mg/l. Review of mammalian toxicity of azo substances has found no evidence of CMR or otherwise systemic toxic effects.