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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:
2017-01-17 – 2017-01-17
Reliability:
1 (reliable without restriction)
Rationale for reliability incl. deficiencies:
guideline study
Justification for type of information:
Experimental result performed using standard methods of analysis
Qualifier:
according to
Guideline:
OECD Guideline 102 (Melting point / Melting Range)
Principles of method if other than guideline:
The melting point determination of Tetrabutylammonium hydrogen sulphate (CAS No. 32503-27-8 ) was done as per the test guideline OECD 102. The method followed was according to Capillary/metal block.
GLP compliance:
no
Type of method:
other: Capillary/metal block
Specific details on test material used for the study:
- Name of test material (as cited in study report): Tetrabutylammonium hydrogen sulphate
- Molecular formula :C16-H36-N.H-O4-S
- Molecular weight (if other than submission substance): 339.53
- Smiles notation: C([N+](CCCC)(CCCC)CCCC)CCC.S([O-])(=O)(=O)O
- InChl : 1S/C16H36N.H2O4S/c1-5-9-13-17(14-10-6-2,15-11-7-3)16-12-8-4;1-5(2,3)4/h5-16H2,1-4H3;(H2,1,2,3,4)/q+1;/p-1
- Substance type: Organic
- Physical state: Solid
Key result
Melting / freezing pt.:
>= 165.3 - <= 167.5 °C
Atm. press.:
977.6 hPa
Decomposition:
no
Sublimation:
no
Conclusions:
The melting point determination of Tetrabutylammonium hydrogen sulphate (CAS No. 32503-27-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined to be 165.3 °C-167.5°C at 977.6hPa
Executive summary:

The melting point determination of Tetrabutylammonium hydrogen sulphate (CAS No. 32503-27-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined  to be 165.3 °C-167.5°C at 977.6hPa

Description of key information

The melting point determination of Tetrabutylammonium hydrogen sulphate (CAS No. 32503-27-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined  to be 165.3 °C-167.5°C at 977.6hPa

Key value for chemical safety assessment

Melting / freezing point at 101 325 Pa:
165.3 °C

Additional information

The melting point determination of Tetrabutylammonium hydrogen sulphate (CAS No. 32503-27-8) was done following OECD Guideline 102 and according to the metal block capillary method. The test was conducted in replicates and mean melting temperature range was determined  to be 165.3 °C-167.5°C at 977.6hPa.

Other supporting study from authoritative database suggests that the melting point  of chemical Tetrabutylammonium hydrogen sulphate was reported to be in the range of 170-171 °C.

As the data from lab has K1 reliability and the test was performed using OECD guidelines which has the value of melting point as 165.3 °C-167.5°C at 977.6hP

,thus considered as key study for the chemical safety assessment.