Registration Dossier
Registration Dossier
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EC number: 201-180-5 | CAS number: 79-14-1
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- temperature of decomposition (state purity)
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 13 January 2021 - 18 August 2021
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Qualifier:
- according to guideline
- Guideline:
- OECD Guideline 103 (Boiling point/boiling range)
- Version / remarks:
- EPA OPPTS 830.7220
- GLP compliance:
- yes (incl. QA statement)
- Type of method:
- differential scanning calorimetry
- Key result
- Decomposition:
- ambiguous
- Decomp. temp.:
- 145 °C
- Conclusions:
- From around 145°C the test item showed ambiguous degradation.
Reference
From around 145°C a small endotherm was recorded, followed by unstable baseline, but there was not a sharp boiling point. As the signal is endo, this is not either unambiguous decomposition.
According to a literature search this is attributed to the partial evaporation of the molten compound with the formation of carbonaceous residue (Nascimento., A.L.C.S et al., 2017. Thermal behaviour of glycolic acid, sodium glycolate and its compounds with some bivalent transition metal ions in the solid state. J. Therm Anal. Calorim (2017) 130:1463-1472).
Description of key information
Glycolic acid shows ambiguous decomposition without clear boiling transition.
Key value for chemical safety assessment
- Temperature of decomposition (state purity):
- 145 °C
Additional information
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