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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 213-147-2 | CAS number: 927-07-1
Endpoint summary
Administrative data
Description of key information
Additional information
Short-term toxicity to fish:
The highest concentration causing no mortality (no observed effect concentration, NOEC) after 96 hours was estimated to be 8.65 mg/L, whereas 100 % mortality was produced within 18 hours at about 31.2 mg/L. The LC50 (96 h) was estimated to be 18.85 mg/L.
The waiver included as separate endpoint study record further gives reference to an assessment made on altogether 28 organic peroxides demonstrating that among the three trophic levels, the alga proved to be the most sensitive species under short-term conditions to organic peroxides. In consequence, a new test on short-term toxicity to fish is not required.
Short-term toxicity to aquatic invertebrates:
The acute toxicity of tert-butyl peroxypivalate to invertebrates was assessed according to OECD guideline 202, EU method C.2 and OPPTS 850.1010. The 48-h EC50 value was determined as 6.99 mg/L, and the 48-h NOEC was determined to be 2.94 mg/L. The results are based on the measured geometric mean test item concentrations.
Long-term toxicity to aquatic invertebrates:
Read-across to the structural analogue TBPIN (CAS 13122-18-4) was performed, as no study with the target substance is available.
The following results were obtained with the source test substance in a 21-day semi-static chronic toxicity test to Daphnia magna: NOEC value of 0.22 mg/L based on reproduction; LOEC value of 0.44 mg/L based on reproduction and EC50 and EC10 values 0.58 and 0.33, respectively, based on reproduction as well. The results were based on measured concentrations.
Toxicity to aquatic algae and cyanobacteria:
The toxicity of tert-butyl peroxypivalate to algae was assessed according to OECD guideline 201, EU method C.3 and OPPTS 850.5400. The 72-h EC50 value based on growth rate was determined as 1.417 mg/L and based on yield was determined as 0.422 mg/L. The 72-h EC10 value based on growth rate was determined as 0.293 mg/L and based on yield was determined as 0.119 mg/L. The overall NOEC was determined to be 0.096 mg/L. The results are based on the measured geometric mean concentrations.
Toxicity to microorganisms:
Under the test conditions tert-butyl peroxypivalate does not show inhibition of the bacterial oxygen consumption up to 10 000 mg/L. Therefore, the EC10 of tert-butyl peroxypivalate was determined to be higher than 10 000 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.
