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Physical & Chemical properties

Auto flammability

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Reference
Endpoint:
relative self-ignition temperature (solids)
Type of information:
experimental study
Adequacy of study:
key study
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 test guidelines
Qualifier:
according to
Guideline:
other: Lowest temperature determined at which substance vaporizes to form an ignitable mixture in air
Principles of method if other than guideline:
Lowest temperature determined at which substance vaporizes to form an ignitable mixture in air
GLP compliance:
not specified
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
Remarks on result:
other: Chemical (CAS no. 5281-04-9) ignites only when the flame of bunsen burner having temperature of 950°C is brought in contact with it.Thus it can be concluded that substance is flammable only at high temperature of about 950°C.
Conclusions:
Calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate did not catch fire on being exposed to air at room temperature of 27°C pressure of 976.9 hPa. This indicates that calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate is not auto-flammable.
Executive summary:

Calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate did not catch fire on being exposed to air at room temperature of 27°C pressure of 976.9 hPa. This indicates that calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate is not auto-flammable.

Description of key information

Calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate did not catch fire on being exposed to air at room temperature of 27°C pressure of 976.9 hPa. This indicates that calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate is not auto-flammable.

Key value for chemical safety assessment

Additional information

Calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate did not catch fire on being exposed to air at room temperature of 27°C pressure of 976.9 hPa. This indicates that calcium 3 -hydroxy-4 -[(4 -methyl-2 -sulfonatophenyl)diazenyl]-2 -naphthoate is not auto-flammable.