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Melting point / freezing point

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Reference
Endpoint:
melting point/freezing point
Type of information:
experimental study
Adequacy of study:
key study
Study period:
31-08-2017 – 31- 08-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
comparable to guideline study
Justification for type of information:
Experimental test result performed using standard OECD test guidelines.
Qualifier:
according to
Guideline:
other: as mentioned below
Principles of method if other than guideline:
The Freezing point determination of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No.93964-07-9) was done using crushed ice and salt.
GLP compliance:
not specified
Type of method:
other: crushed ice and salt method (Freezing Temperature Method)
Specific details on test material used for the study:
- Name of the test material: N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine
- Regulatory name: N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine
- Molecular formula: C32H37N5
- Molecular weight: 491.6793 g/mol
- Smiles: CCCCC(CC)CNc1ccc2ccccc2c1/N=N/c3ccc(cc3C)/N=N/c4ccc(cc4)C
- InChI: 1S/C32H37N5/c1-5-7-10-25(6-2)22-33-31-19-15-26-11-8-9-12-29(26)32(31)37-36-30-20-18-28(21-24(30)4)35-34-27-16-13-23(3)14-17-27/h8-9,11-21,25,33H,5-7,10,22H2,1-4H3/b35-34+,37-36+
- Substance type: Organic
Physical form: Dark red clear liquid
Key result
Melting / freezing pt.:
< -11.84 °C
Atm. press.:
972.4 hPa
Remarks on result:
other: no other details mentioned

Method Details

Observations

Remarks if, any

Method

Freezing Temperature Method

-

 

Principle of Freezing point test

The freezing point of a pure sample is the temperature at which transition from liquid to solid state takes place at atmospheric pressure.

-

Quantity of test item used

g

1 ml

Type of cooling bath used

 

Cold Water Crushed Ice Crushed Ice-Salt Dry Ice

Other (specify)

 

 

Crushed Ice- Salt

Type and model no. of temperature sensor used

 

Glass thermometer Thermocouple Thermistor

Other (specify)

Thermistor

Atmospheric pressure

hPa

972.4 hPa

Freezing point

°C

°C

less than

-11.84 °C

 

Conclusions:
The Freezing point of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine; CAS No. 93964-07-9 was determined using
freezing temperature method. No freezing was observed up to less than -11.84 °C.
Executive summary:

The Freezing point determination of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No. 93964-07-9) was done using crushed ice and salt. No freezing was observed up to -11.84°C. Hence, the freezing point was inferred to be less than -11.84 °C at 972.4 hPa.

Description of key information

The Freezing point of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine; CAS No. 93964-07-9 was determined using freezing temperature method. No freezing was observed up to less than -11.84 °C.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
-11.84 °C

Additional information

The Freezing point determination of N-(2-ethylhexyl)-1-[[2-methyl-4-[(4-methylphenyl)azo]phenyl]azo]naphthalen-2-amine (CAS No. 93964-07-9) was done using crushed ice and salt. No freezing was observed up to -11.84°C. Hence, the freezing point was inferred to be less than -11.84 °C at 972.4 hPa.