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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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: 270-220-1 | CAS number: 68413-48-9
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Butanedioic acid, 2-[[bis[(2-ethylhexyl)oxy]phosphinothioyl]thio]-, 1,4-dibutyl ester
- Type of composition:
- legal entity composition of the substance
- State / form:
- liquid
- Reference substance:
- Butanedioic acid, 2-[[bis[(2-ethylhexyl)oxy]phosphinothioyl]thio]-, 1,4-dibutyl ester
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Conclusion on P / vP properties: vP (and P)
The test item attained 12.1% biodegradation after 28 days and therefore cannot be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No. 301B.
Conclusion on B / vB properties: not B/vB
The water solubility is expected to be low and partition coefficient (Log Pow) of the substance is > 6.5. The typical molecular mass of the substance (C28H55O6PS2) is 582.84 Daltons. These data indicate that the substance is relatively large (> 500 Daltons) and is a highly lipophilic (Log Pow > 5.6) molecule, and thus is not expected to be absorbed by fish. In addition, acute oral toxicity study of the substance in rats concluded its oral LD50 of 11300 mg/kg body weight. Repeated dose oral toxicity studies in rats did not show any systemic effects up to 1000 mg/kg/day, the highest doses tested in both 14-day oral toxicity study and combined repeated dose oral toxicity study with the reproductive/developmental toxicity screening test. No information is currently available on possible degradation products produced in the gastrointestinal tract.
Conclusion on T properties: not T
No evidence of toxicity has been reported in any study on the test item.
- Likely routes of exposure:
The primary route of test item release release will be to wastewater, although this is advised against.
It may be released to air through use processes, however, the vapour pressure is 0.0287 Pa at 25 °C
and therefore air exposure is expected to be negligible.
Release to soil may occur from spreading of STP sludge’s, however this is advised against.
Reference
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.
