Registration Dossier

Data platform availability banner - registered substances factsheets

Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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.

Diss Factsheets

Physical & Chemical properties

Boiling point

Currently viewing:

Administrative data

Link to relevant study record(s)

Reference
Endpoint:
boiling point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
Feb-May 2013
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
other: A modern study conducted in compliance with GLP standards and followed OECD Guidelines
Qualifier:
according to guideline
Guideline:
OECD Guideline 103 (Boiling point/boiling range)
Deviations:
no
GLP compliance:
yes
Type of method:
method according to Siwoloboff
Specific details on test material used for the study:
Identifier: EXP1200078
Appearance: Very dark brown (almost black) viscous liquid
Batch: E00275-350
Sample Expiration Date: end-2013
Purity:100%
Key result
Boiling pt.:
> 178.3 - <= 400 °C
Atm. press.:
ca. 760 mm Hg
Decomposition:
ambiguous
Remarks:
Color change observed
Decomp. temp.:
ca. 300 °C
Remarks on result:
other: Boiling point not achieved; limitation of test instrumentation upper bound.

Determination of Melting Points for the Reference Standards

 

 

Reference Standard

Instrument Gradient

(°C/min.)

Date Verification Performed

Recorded Melting Point

(°C)

 

Average

Expected Melting Point/Range

(°C)

 

Caffeine

 

 

1.0

 

2/26/13

 

 

237.0

 

--

 

237

 

 

Anthraquinone

 

 

1.0

 

2/26/13

 

2/27/13

 

 

285.3

 

285.1

 

 

285.2

 

 

 

284-286

 

 

 

Benzophenone

 

 

1.0

 

2/26/13

 

2/27/13

 

 

49.5

 

49.3

 

 

49.4

 

 

 

49-51

 

 

 

Note: All calculations were performed using Microsoft®Excel 2000 in full precision mode.

--------------------------------------------------------------------------------------------------------------

Determination of Boiling Point/Range for the Test Substance

 

 

Subsample
ID

Instrument
Gradient
(°C/min)

Barometric
Pressure
(mm Hg)

Start of

Boiling Range

 °C (K)1

End of Boiling Range
°C (K)1

Boiling
Point
°C (K)1

 

523C-189-BP-1

 

523C-189- BP-2

 

523C-189- BP-3

 

 

1.0

 

1.0

 

1.0

 

 

748

 

748

 

750

 

 

178.3 (451.5)

181.0 (454.2)

184.1 (457.3)

 

 

None Observed

None Observed

None Observed

 

 

None Observed

None Observed

None Observed

 

Overall Means:

Standard Deviations:

CV (%):

749

1

0.1

181.1 (454.3)

2.9 (2.9)

1.60 (0.64)

n/a

n/a

n/a

n/a

n/a

n/a

1K (Kelvin) = °C + 273.15   Note: All calculations were performed using Microsoft®Excel 2000 in full precision mode. Additionally, “n/a” denotes “not applicable”.

Conclusions:
The boiling point was determined using a modification of the Siwoloboff procedure which employed a Büchi Melting Point B-540 instrument with boiling point tubes and boiling point capillaries, also supplied by Büchi.

EXP1200078 thermally degraded as the instrument block temperature approached 350°C. No boiling point / range could be determined.
Executive summary:

The test substance thermally degraded as the instrument block temperature approached 350°C. No boiling point / range could be determined.

Description of key information

A Key GLP study conducted in accordance with OECD guideline.

The test substance thermally degraded as the instrument block temperature approached 350°C. No boiling point / range could be determined.

Key value for chemical safety assessment

Additional information

Boiling point > 178.3 which was the temperature at which capillary bubbling was first observed. The sample degraded with further temperature increase.