Registration Dossier
Registration Dossier
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EC number: 238-961-5 | CAS number: 14887-42-4
Melting point / freezing point
Administrative data
Link to relevant study record(s)
- Endpoint:
- melting point/freezing point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- From: 08/07/2009 To: 06/10/2009
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 102 (Melting point / Melting Range)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.1 (Melting / Freezing Temperature)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- EPA OPPTS 830.7200 (Melting Point / Melting Range)
- Deviations:
- no
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- capillary method
- Melting / freezing pt.:
- > 400.1 - < 408 K
- Melting / freezing pt.:
- > 127 - < 134.8 °C
- Conclusions:
- Potassium pentahydrogen bis(phosphate) melted in the range of 127°C to 135°C. This study is conducted according to an appropriate guideline and under the conditions of GLP and therefore the study is considered to be acceptable and to adequately satisfy both the guideline requirement and the regulatory requirement as a key study for this endpoint.
Reference
The test item showed five stages of melting. The melting started at 127 °C. At 135 °C the final stage of melting was reached. No solid particles were left.
Table 1 - Results for the determination of the melting/ melting range of Potassium pentahydrogen bis(phosphate)
Experiment # |
Stage A [°C] |
Stage B [°C] |
Stage C [°C] |
Stage D [°C] |
Stage E [°C] |
1 |
127.1 |
128.1 |
129.1 |
130.7 |
134.8 |
2 |
127.0 |
128.0 |
129.5 |
130.8 |
134.9 |
3 |
126.8 |
128.0 |
130.0 |
131.0 |
134.8 |
Mean value (n=3): |
127.0 |
128.0 |
129.5 |
130.8 |
134.8 |
Result in ‘Kelvin’ |
400.1 K |
401.2 K |
402.7 K |
404.0 K |
408.0 K |
Stage A: Beginning of melting / wet point; Stage B: Shrinking point; Stage C: Collapse point; Stage D: Liquefying point; Stage E: Final stage of melting.
Description of key information
One key study exists. This study (Fieseler A, 2009) was conclusive, done to a valid guideline (EU Method A.1) and the study was conducted under GLP conditions. It is therefore scientifically justified for use as a key study under Regulation (EC) No. 1907/2006.
Key value for chemical safety assessment
Additional information
Potassium pentahydrogen bis(phosphate) melted in the range of 127°C to 135°C.
Information on Registered Substances comes from registration dossiers which have been assigned a registration number. The assignment of a registration number does however not guarantee that the information in the dossier is correct or that the dossier is compliant with Regulation (EC) No 1907/2006 (the REACH Regulation). This information has not been reviewed or verified by the Agency or any other authority. The content is subject to change without prior notice.
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