Registration Dossier
Registration Dossier
Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.
Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 296-473-8 | CAS number: 92704-41-1 The product of high temperature calcination (above 450°C (842°F)) of naturally occurring kaolin, a hydrated aluminum silicate, resulting in the evolution of water and the formation of new substances depending upon the calcination temperatures employed.
Toxicity to microorganisms
Administrative data
Link to relevant study record(s)
Description of key information
Toxicity testing with microorganisms resulted in an EC10(16h) of 1400 mg/L.
Key value for chemical safety assessment
- EC50 for microorganisms:
- 2 800 mg/L
- EC10 or NOEC for microorganisms:
- 1 400 mg/L
Additional information
One study for toxicity to microorganisms is available on a structurally related compound according to DIN 38412, part 8.
In this key study, a catalyst (FCC Futura) was tested for effects on Pseudomonas putida in a series of 5 concentrations, resulting in an EC10 (16 h) and EC50 (16 h) for growth inhibition of 1400 mg/L and 2800 mg/L, respectively (Weyandt 1998). Due to the turbidity of the test substance, a photometric analysis of cell numbers was not feasible, instead colony counts on agar plates were conducted. A slight increase in growth was observed at 1000 mg/L, with a decreasing number of colony building units from 2000 mg/L.
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.
