Registration Dossier
Registration Dossier
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EC number: 700-485-5 | CAS number: 939402-02-5
PBT assessment
Administrative data
PBT assessment: overall result
- Name:
- Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters
- Type of composition:
- legal entity composition of the substance
- State / form:
- liquid
- Reference substance:
- Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters
- Reference substance:
- Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters
- Reference substance:
- Phosphorous acid, mixed 2,4-bis(1,1-dimethylpropyl)phenyl and 4-(1,1-dimethylpropyl)phenyl triesters
- PBT status:
- the substance is not PBT / vPvB
- Justification:
Persistency
Ready biodegradation studies have shown that the material does degrade by abiotic means i. e. hydrolysis, although the rate of hydrolysis is not provided by these studies. The test item attained 20% degradation after 28 days and therefore cannot be considered to be readily biodegradable under the strict terms and conditions of OECD Guideline No 301B. In the OECD 302C Inherent Biodegradability: Modified MITI Test (II) the percentage biodegradation at the end of the test by BOD were 0%. At the end of the test, the abiotic degradation rate of the test substance was 91.7%, so it's of little importance to calculate the primary biodegradation according to the residual content of test substance.
Bioaccumulation
With consideration to the complex composition of the test substance, its bioaccumulation potential was evaluated based on the analysis of three quantifiable components (referred to as component A: MW* 520.68, component B: MW 590.82 and component C: MW 660.95). The test substance is considered not to be highly bioaccumulative based on the results. BCF: 352 dimensionless
Toxicity
NOELR values from long-term toxicity studies in Daphnia, Fish and algae are > 100 mg/l loading rate WAF. The substance is not classified as a CMR, nor as a STOT-RE Cat 1 or 2. The substance carries no classification, and is not considered to be a PBT material.
Reference
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