Disodium {sulfonylbis[4,1-phenylenediazene-2,1-diyl(1-ethyl-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridine-5,3-diyl)]}dimethanesulfonate

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Study conducted on 19-Oct-2010

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

other: see 'Remark'

Remarks:

Study conducted in compliance with agreed protocols, with no or minor deviations from standard test guidelines and/or minor methodological deficiencies, which do not affect the quality of the relevant results. The study report was conclusive, done to a valid guideline and the study was conducted under GLP conditions.

Cross-reference

Reason / purpose for cross-reference:

reference to other study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2010

Report date:

2010

Materials and methods

Test guideline

Test guideline 1

Qualifier:

according to guideline

Guideline:

EU Method A.2 (Boiling Temperature)

Deviations:

no

Test guideline 2

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling point/boiling range)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

Acid Yellow RN 2903

IUPAC Name:

Acid Yellow RN 2903

Details on test material:

Identification: Acid Yellow RN 2903
Batch Number: Vers. Kilo 6, 26.05.2009
Purity: 65.7 %
Expiry Date: August 01, 2015
Storage Conditions: At room temperature at about 20 °C

Results and discussion

Boiling point

Boiling pt.:

K

Atm. press.:

101.6 Pa

Decomposition:

yes

Decomp. temp.:

> 323 °C

Remarks on result:

other: measured at ambient pressure

Any other information on results incl. tables

Preliminary Test               

The preliminary test was performed in Harlan Laboratories study D04336. The DSC-curve of the preliminary test (heating rate of 20 °C/min from 25 °C to 400 °C) is shown in the attached Figure1. An endothermic heat effect was observed starting at 57.3 °C and an exothermic heat effect was observed starting at 332.5 °C. After the experiment, the sample had lost about 29.7% of its mass and the sample was black and powdery.

 

 

Main Test               

The main test was performed in Harlan Laboratories study D04336. During this run, the endothermic heat effect started at 59.0 °C and the exothermic heat effect started at 323.3 °C. After the measurement, the test item lost about 30.8% of its mass and a black powder remained in the sample cup, indicating that the test item decomposed before boiling occurred. The endothermic heat effect might be the result of emitting water or other volatile components. The DSC curve of the main test is given in the attached Figure 2.

 

Applicant's summary and conclusion

Conclusions:

Decomposition of Acid Yellow RN 2903 started at about 323 °C before boiling occurred.

Executive summary:

Decomposition of Acid Yellow RN 2903 started at about 323 °C before boiling occurred.