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Administrative data

Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
2012
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: The reliability is rated 2 because the study is well documented and meets generally accepted scientific principles. The results were reviewed for reliability and assessed as valid. Study not conducted under GLP conditions.

Data source

Reference
Reference Type:
other company data
Title:
Unnamed
Year:
2012
Report date:
2012

Materials and methods

Test guideline
Qualifier:
equivalent or similar to guideline
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Version / remarks:
similar to Kofler hot bar
Deviations:
yes
Remarks:
: hot bar PROLABO, temperature is homogenous on the hot bar
Principles of method if other than guideline:
Technic similar to the Kofler Hot bar.
Apparatus PROLABO, temperature is homegenous at every point of the hot bar
GLP compliance:
no
Type of method:
other: similar to Kofler hot stage

Test material

Constituent 1
Chemical structure
Reference substance name:
tetrakis{9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium} C12-(branched and/or linear)-alkyl-(4-sulfonatophenoxy)benzenesulfonate and oxybis[C12-(branched and/or linear)-alkyl-benzenesulfonate]
EC Number:
700-761-5
Molecular formula:
not applicable
IUPAC Name:
tetrakis{9-[2-(ethoxycarbonyl)phenyl]-3,6-bis(ethylamino)-2,7-dimethylxanthylium} C12-(branched and/or linear)-alkyl-(4-sulfonatophenoxy)benzenesulfonate and oxybis[C12-(branched and/or linear)-alkyl-benzenesulfonate]
Details on test material:
- Name of test material (as cited in study report): Sepisol Fast RED SN
- Substance type: organic salt - UVCB
- Analytical purity: 97.1 % w/w - 98.1 % w/w
- batch: 029244
- Stability under test conditions: stable under test conditions
- Storage condition of test material: room temperature

Results and discussion

Melting / freezing point
Atm. press.:
1 013 hPa
Decomposition:
yes
Remarks:
micro bubbles
Decomp. temp.:
> 295 °C
Remarks on result:
other: The test item shows no melting point, with no liquid phase at no point but a softening of the test item from 180 to 185 °C.

Any other information on results incl. tables

Calibration of the hot bar Prolabo: A clear and sharp dividing line is observed and a fluid phase is appearing. We observed a temperature lag between the theoretical melting and the measured one, but the order of magnitude is correct.

 

Sepisol Fast Red SN: With the increase temperature, the test item became bright and soft. At no point a liquid state appeared.

 

Dowfax solution: First, the water is removed with apparition of a white and dry product, then the test item turned brown around 270°C: no melting.

Produit

T°C at which the product becomes sticky

Measured T°C of the « apparent melting »

Corrected T°C according the « standard »

Decomposition T°C

Ammonium dihydrogen phosphate

Theoretical MP= 190 °C

185 °C

200 °C

Correction =

-10 °C towards 200°C

 

Potassium thiocyanate

Theoretical MP = 173 °C

172 °C

176 °C

Correction =

-3°C towards 170°C

 

Red SN

Lot 029244

165 °C

188 °C

No melting

(softening at

180 – 185 °C)

295 °C

Micro-bubbles

Dowfax 2A1

Lot WL 2401

260 °C

No melting

No melting

270 °C

Product turns brown

Applicant's summary and conclusion

Conclusions:
Under normal conditions of pressure, Sepisol Fast Red SN has no melting point. It becames bright and soft at 180-185°C but with no liquid phase. The test item starts bubbling at 295°C and decomposes.