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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Endpoint summary

Administrative data

Description of key information

Additional information

The test item Leuco Sulfur Black 1 was investigated for its ready biodegradability in a manometric respirometry test over 28 days according to the EU Commission Directive 92/69 EEC, C.4-D Commission Regulation (EC) No 440/2008, C.4-D and the OECD Guideline for Testing of Chemicals No. 301 F.

The biochemical oxygen demand (BOD) of the test item Leuco Sulfur Black 1 in the test media was in the normal range found for the inoculum controls.

Consequently, Leuco Sulfur Black 1 was not biodegradable under the test conditions within 28 days.

In the toxicity control, containing both Leuco Sulfur Black 1 and the reference item sodium benzoate, Leuco Sulfur Black 1 had no inhibitory effect on the activity of activated sludge microorganisms at the tested concentration of 142 mg/L.

In the procedure controls, the reference item sodium benzoate was degraded by an average of 80% by Exposure Day 14, and reached an average biodegradation of 82% by the end of the test (Day 28), thus confirming suitability of the activated sludge.