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Physical & Chemical properties

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:
16-03-2017 – 16-03-2017
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard OECD test guidelines
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The melting point determination of Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex was done as per the test guideline OECD 102, by Capillary/metal block method.
GLP compliance:
not specified
Type of method:
other: Capillary/metal block method
Specific details on test material used for the study:
- Name of test material: Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex- IUPAC name: aluminum tris(4-{[3-carboxy-5-oxo-1-(4-sulfophenyl)-4,5-dihydro-1H-pyrazol-4-yl]diazenyl}benzenesulfonate)- Molecular formula: C48H33AlN12O27S6- Molecular weight: 1429.19 g/mole- Smiles : C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].C1=CC(=CC=C1N=NC2C(=NN(C2=O)C3=CC=C(C=C3)S(=O)(=O)O)C(=O)O)S(=O)(=O)[O-].[Al+3]- Inchl: 1S/3C16H12N4O9S2.Al/c3*21-15-13(18-17-9-1-5-11(6-2-9)30(24,25)26)14(16(22)23)19-20(15)10-3-7-12(8-4-10)31(27,28)29;/h3*1-8,13H,(H,22,23)(H,24,25,26)(H,27,28,29);/q;;;+3/p-3- Substance type: Organic- Physical state: Solid Red powder
Key result
Atm. press.:
976.8 hPa
Decomposition:
yes
Decomp. temp.:
>= 365.5 - <= 370 °C
Sublimation:
no
Remarks on result:
other: Capillary/metal block method

TEST DESCRIPTION AND RESULT

Method Details

 

Observations

Remarks if, any

Guideline

OECD 102

-

 

Method

Capillary/metal block

-

Principle of method

 

The temperature at which a solid becomes a liquid at standard atmospheric pressure

-

Grinding of Test

item done

 

Not required

Atmospheric

pressure

hPa

976.8 hPa

Decomposition

Decomposition temperature (°C), if applicable

Yes

Sublimation

Sublimation temperature(°C), if applicable

No

Decomposition

temperature range

°C

365.5 - 370 °C

Conclusions:
The decomposition temperature range of Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex (CAS No. 12225-21-7) was determined in the range of 365.5 - 370°C at 976.8 hPa.
Executive summary:

The melting point determination of Test item Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex (CAS No. 12225-21-7) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The decomposition temperature range was determined to be 365.5 - 370°C at 976.8 hPa.

Description of key information

The decomposition temperature range of Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex (CAS No. 12225-21-7) was determined in the range of 365.5 - 370°C at 976.8 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
370 °C

Additional information

The melting point determination of Test item Aluminium, 4,5-dihydro-5-oxo-1-(4-sulfophenyl)-4-[(4-sulfophenyl)azo]-1H-pyrazole-3-carboxylic acid complex (CAS No. 12225-21-7) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block. The decomposition temperature range was determined to be 365.5 - 370°C at 976.8 hPa.