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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:
15-01-2018 – 15-01-2018
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental test result performed using standard 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 Calcium 3-hydroxy-4-[(4-methyl-2-sulphonatophenyl)azo]- 2-naphthoate (CAS No. 5281-04-9) was done following OECD Guideline 102 and according to the metal block capillary method
GLP compliance:
not specified
Type of method:
other: standard laboratory method
Specific details on test material used for the study:
- Name of test material : 2-Naphthalenecarboxylic acid, 3-hydroxy-4-[(4-methyl-2-sulfophenyl)azo]-, calcium salt- Molecular formula : C18H14N2O6S.Ca- Molecular weight : 424.445 g/mole- Smiles notation : c12c(c(c(C(=O)[O-])cc1cccc2)O)\N=N\c1c(cc(C)cc1)S(=O)(=O)[O-].[Ca+2]- InChl : 1S/C18H14N2O6S.Ca/c1-10-6-7-14(15(8-10)27(24,25)26)19-20-16-12-5-3-2-4-11(12)9-13(17(16)21)18(22)23;/h2-9,21H,1H3, (H,22,23)(H,24,25,26);/q;+2/p-2/b20-19+;- Substance type: Organic - Physical state: Solid - Analytical purity: 87%- Impurities (identity and concentrations): 13%
Key result
Melting / freezing pt.:
> 400 °C
Atm. press.:
976.9 hPa
Decomposition:
no
Sublimation:
no
Remarks on result:
other: other details not available
Conclusions:
The melting point determination of Calcium 3-hydroxy-4-[(4-methyl-2-sulphonatophenyl)azo]- 2-naphthoate (CAS No. 5281-04-9) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and No change was observed up to 400°C, inferring that the Mean Melting Point was determine to be greater than 400°C at 976.9 hPa.
Executive summary:

The melting point determination of Test item Calcium 3 -hydroxy-4 -[(4 -methyl-2 - sulphonatophenyl)azo]-2 -naphthoate (CAS No. 5281 -04 -9 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block.No change was observed up to 400°C, inferring that the Mean Melting Point was determine to be greater than 400°C at 976.9 hPa.

Description of key information

The melting point determination of Test item Calcium 3 -hydroxy-4 -[(4 -methyl-2 - sulphonatophenyl)azo]-2 -naphthoate (CAS No. 5281 -04 -9 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block.No change was observed up to 400°C, inferring that the Mean Melting Point was determine to be greater than 400°C at 976.9 hPa.

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
400 °C

Additional information

The melting point determination of Test item Calcium 3 -hydroxy-4 -[(4 -methyl-2 - sulphonatophenyl)azo]-2 -naphthoate (CAS No. 5281 -04 -9 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block.No change was observed up to 400°C, inferring that the Mean Melting Point was determine to be greater than 400°C at 976.9 hPa.

From other reliable sources & authorative databases it is concluded that melting point of calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate is greater than 200 Deg C & 357.5 Deg C.