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EC number: 701-237-9 | CAS number: -
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Data waiving:
- study scientifically not necessary / other information available
- Justification for data waiving:
- the study does not need to be conducted because the substance is a solid which melts above 300°C
- Conclusions:
- The boiling point study does not need to be conducted as the substance decomposes without boiling.
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- supporting study
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Type of method:
- other: DSC
- Boiling pt.:
- > 103 °C
- Atm. press.:
- 981 mBar
- Conclusions:
- The test item shows a boiling (or/ and a thermal decomposition with evaporation of the decomposition components) from a subcomponent (ca. 11 wt. % - possibly water of crystallisation) earliest at ca. 103°C (at 981 mbar) according to the definition in the OECD guideline 103.
Referenceopen allclose all
The test item shows a boiling (or/ and a thermal decomposition with evaporation of the decomposition components) from a subcomponent (ca. 11 wt. % - possibly water of crystallisation) earliest at ca. 103°C (at 981 mbar) according to the definition in the OECD guideline 103.
Description of key information
Boiling point: HEDP salt melts above 450°C.
Key value for chemical safety assessment
Additional information
The requirement to conduct a boiling point study for the substance is waived because the substance has a melting temperature of >450°C. This statement is supported by a recent, reliable DSC test which demonstrates that the parent HEDP acid does not melt below 450°C. The DSC thermograms show evidence of loss of water at about 100°C. Salts would also be expected to undergo thermal loss of water as the parent acid. This conclusion is supported by available data for HEDP-4Na which indicates that the test substance undergoes loss of water from 103°C at 981 mBar.
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