1-(methylamino)-4-[(3-methylphenyl)amino]anthraquinone

Boiling point

Administrative data

Endpoint:

boiling point

Type of information:

experimental study

Adequacy of study:

key study

Study period:

Experimental starting date: 17 October 2017. Experimental completion date: 17 January 2018

Reliability:

1 (reliable without restriction)

Rationale for reliability incl. deficiencies:

guideline study

Data source

Reference

Reference Type:

study report

Title:

Unnamed

Year:

2018

Materials and methods

Test guideline

Qualifier:

according to guideline

Guideline:

OECD Guideline 103 (Boiling Point)

Deviations:

no

GLP compliance:

yes (incl. QA statement)

Type of method:

differential scanning calorimetry

Test material

Test material information

Constituent 1

Reference substance name:

1-(methylamino)-4-[(3-methylphenyl)amino]anthraquinone

EC Number:

229-059-2

EC Name:

1-(methylamino)-4-[(3-methylphenyl)amino]anthraquinone

Cas Number:

6408-50-0

Molecular formula:

C22H18N2O2

IUPAC Name:

1-(methylamino)-4-[(3-methylphenyl)amino]-9,10-dihydroanthracene-9,10-dione

Test material form:

solid: particulate/powder

Details on test material:

Identification: 1-(methylamino)-4-[(3-methylphenyl)amino] anthraquinone
Physical state/Appearance: dark red powder
Batch: 702W01
Purity: 99.4%
Expiry Date: 08 February 2020
Storage Conditions: room temperature in the dark
Intended use/Application: industrial chemical

Results and discussion

Boiling point

Key result

Decomposition:

yes

Decomp. temp.:

ca. 290 °C

Any other information on results incl. tables

Thermographic Data (Melting Temperature)

Thermal Event	Interpretation	Temperature (°C)
		Determination 2	Determination 4
Sharp endotherm	Onset of melting	148.27	148.15

Mean melting temperature:    148.2 ± 0.5 °C (421.4 ± 0.5 K)

Thermographic Data (Boiling Temperature)

Thermal Event	Interpretation	Temperature (°C)
		Determination 1 (Air)	Determination 3 (Nitrogen)
Broad exotherm	Onset of decomposition	~290C	~350

Onset of decomposition:        From approximately 290 °C (563 K)

Atmospheric pressure:           Determination 1:  101.1 kPa
                                               Determination 3:  101.8 kPa

Furthermore, as determinations 1 and 3 indicated a distinct rise in the baseline which was consistent with a browning of the test item, the test item was considered to have decomposed above approximately 290 °C (563 K).

Discussion

Determinations 1 and 3 indicated a distinct rise in the baseline, consistent with a browning of the test item; thus the test item was considered to have decomposed above approximately 290 °C (563 K). As a result of the low rate of enthalpy change during decomposition, the onset temperature of decomposition could only be approximated.

Similar thermographic profiles were obtained using air and nitrogen atmospheres; this indicated that the observed decomposition was probably thermal and not oxidative.

Applicant's summary and conclusion

Conclusions:

The test item has been determined to melt at 148.2 ± 0.5 °C (421.4 ± 0.5 K) and then decompose from approximately 290 °C (563 K) at 101.1 to 101.8 kPa. As the test item decomposed no boiling temperature could be determined.