Registration Dossier
Registration Dossier
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EC number: 227-369-2 | CAS number: 5809-08-5
Flash point
Administrative data
Link to relevant study record(s)
- Endpoint:
- flash point of flammable liquids
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- December 2012
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- other: Well conducted study, according ISO guideline, certificate of analysis separately and included in the report.
- Qualifier:
- according to guideline
- Guideline:
- ISO No., other: 3679, Determination of flash point – Rapid equilibrium closed cup method, 2004
- Deviations:
- not specified
- GLP compliance:
- no
- Type of method:
- closed cup
- Key result
- Flash point:
- 37 °C
- Remarks on result:
- other: Diisobutylene content is: 2.4%
- Key result
- Flash point:
- 42 °C
- Remarks on result:
- other: Diisobutylene content is: 2.02%
- Conclusions:
- The flashpoint of 1,1,3,3-tetramethylbutyl hydroperoxide with Diisobutylene 2.4% is 37°C, with 2.02% is 42°C.
- Executive summary:
This study confirms, that the flashpoint decreases when the Diisobutylene concentration increases.
- Endpoint:
- flash point of flammable liquids
- Data waiving:
- other justification
- Justification for data waiving:
- other:
Referenceopen allclose all
Description of key information
The endpoint is waived for the pure 1,1,3,3-tetramethylbutyl hydroperoxide, which decomposes before the flashpoint is reached.
The flashpoint of the commercial product 1,1,3,3-tetramethylbutyl hydroperoxide with 2.4 -2 % diisobutylene is 37-51°C.
Key value for chemical safety assessment
Additional information
Robust summary |
Diisobutylene % |
Flash point °C |
5809-08-5, Flash point, Van Biljouw, 2012, RS |
2.4 |
37 |
5809-08-5, Flash point, Van Biljouw, 2012, RS |
2.02 |
42 |
5809-08-5, Flash point, Ruiter, 2001, rs |
Not given |
51 |
5809-08-5, Flash point, Wijting, 1981, RS |
2.0 |
49-50 |
5809-08-5, Flash point pure substance, waiver |
0 |
60 (=SADT) |
The flash point is strongly influenced by the presence of diisobutylene (DIB) with fp -7°C in the commercial substance.
The flashpoint decreases when the Diisobutylene concentration increases.
Self-Accelerating Decomposition Temperature (SADT) of the substance is 60°C (reference SADT: CLP regulations 2.15.2.3 and UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, 5th revised edition, sub-sections 28.1, 28.2, 28.3 and Table 28.3.) See also ECHA guidance on the application of the CLP criteria, section 2.14.
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.
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