Registration Dossier

Physical & Chemical properties

Flash point

Currently viewing:

Administrative data

Link to relevant study record(s)

Referenceopen allclose all

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:
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:

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.