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Physical & Chemical properties

Boiling point

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Administrative data

Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, no restrictions
Justification for type of information:
A discussion and report on the read across strategy is given as an attachment in Section 13.
Cross-reference
Reason / purpose:
read-across: supporting information
Reference
Endpoint:
boiling point
Type of information:
read-across based on grouping of substances (category approach)
Adequacy of study:
key study
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: GLP compliant, guideline study, no restrictions
Justification for type of information:
A discussion and report on the read across strategy is given as an attachment in Section 13.
Reason / purpose:
read-across source
Atm. press.:
102.4 kPa
Decomposition:
yes
Decomp. temp.:
ca. 265 °C

Apparatus : Boiling temperature device with liquid bath and thermometer.

 Run Number

 Mass of sample used (g)

 Boiling Temperature (°C)

 1

 0.0294

 N/A

 2

 0.0311

 N/A

 Mean Boiling Temp (°C)

N/A 

 

Result : Not determined

Pressure at which measurements were taken (kPa) : 102.4

Comments

Sample began to discolour to dark yellow, before darkening to dark brown at 265°C. Testing was therefore terminated due to decomposition being suspected.

Conclusions:
The boiling point was not determined, (>265°C)
Executive summary:

This data is being read across from the source study that tested Rosin, hydrogenated based on category read across that is explained in the category justification document attached in Section 13 of the dossier.

Boiling point for hydrogenated Rosin was measured by Siwoloboff method according to the protocol in EU Regulation (EC) 440/2008 (test A2) and in compliance with GLP. Sample began to discolour to dark yellow, before darkening to dark brown at 265°C. Test was terminated at 265°C and no boiling point was observed. No decomposition was observed. Decarboxylation of some  resin acids starts at this temperature of 265°C. However a full decarboxylation will require higher temperature and some time. Sample discoloured to dark brown at 275°C.  This phenomenon is not the consequence of a decomposition reaction of the substance. Hydroperoxydes (oxydized resin acids) develop during ambient storage and the heating of those hydroperoxydes cause their decomposition: this forms powerfull chromophores (hydroperoxyde cleavage) that even in very small amount color the resin and bring the darkening.

Data source

Reference
Reference Type:
study report
Title:
Unnamed
Year:
2010
Report Date:
2010

Materials and methods

Test guideline
Qualifier:
according to
Guideline:
EU Method A.2 (Boiling Temperature)
GLP compliance:
yes (incl. certificate)
Type of method:
method according to Siwoloboff

Test material

Reference
Name:
Unnamed
Type:
Constituent
Details on test material:
Test Substance Name Hydrogenated Rosin
CAS No. 65997-06-0
Supplied By Eastman Chemicals
Description Light amber pellets.

Results and discussion

Boiling point
Atm. press.:
102.4 kPa
Decomposition:
yes
Decomp. temp.:
ca. 265 °C

Any other information on results incl. tables

Apparatus : Boiling temperature device with liquid bath and thermometer.

 Run Number

 Mass of sample used (g)

 Boiling Temperature (°C)

 1

 0.0294

 N/A

 2

 0.0311

 N/A

 Mean Boiling Temp (°C)

N/A 

 

Result : Not determined

Pressure at which measurements were taken (kPa) : 102.4

Comments

Sample began to discolour to dark yellow, before darkening to dark brown at 265°C. Testing was therefore terminated due to decomposition being suspected.

Applicant's summary and conclusion

Conclusions:
The boiling point was not determined, (>265°C)
Executive summary:

Boiling point for hydrogenated Rosin was measured by Siwoloboff method according to the protocol in EU Regulation (EC) 440/2008 (test A2) and in compliance with GLP. Sample began to discolour to dark yellow, before darkening to dark brown at 265°C. Test was terminated at 265°C and no boiling point was observed. No decomposition was observed. Decarboxylation of some  resin acids starts at this temperature of 265°C. However a full decarboxylation will require higher temperature and some time. Sample discoloured to dark brown at 275°C.  This phenomenon is not the consequence of a decomposition reaction of the substance. Hydroperoxydes (oxydized resin acids) develop during ambient storage and the heating of those hydroperoxydes cause their decomposition: this forms powerfull chromophores (hydroperoxyde cleavage) that even in very small amount color the resin and bring the darkening.