Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Ecotoxicological information

Toxicity to microorganisms

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Administrative data

Link to relevant study record(s)

Description of key information

NOEC = 308.60 mg/L 
EC50= 446.35 mg/L (433.73 - 451.25 mg/L)

Key value for chemical safety assessment

EC50 for microorganisms:
446.35 mg/L
EC10 or NOEC for microorganisms:
308.6 mg/L

Additional information

For this endpoint, the read across between PWH/ammonium and PWH/sodium salt is valid, because this environmental toxicological property is defined by the main component.The read across justification that takes into account the ammonium ion properties is attached on section 13 of the dossier.

The toxic effect on aerobic treatment plant microorganisms of the test item " Paraffin waxes and Hydrocarbon waxes C14-17, chloro, sulfochlorinated, low sulphonated, saponified" was tested with activated sludge after 3-hours contact.

Since the daphnia study has demonstrated that the registering substance has less toxic effect on aquatic organisms it can be assumed that the results of this test can be taken as conservative also for Paraffin waxes and Hydrocarbon waxes, chloro, sulfochlorinated, saponified