Registration Dossier
Registration Dossier
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EC number: 226-540-9 | CAS number: 5421-46-5
Boiling point
Administrative data
Link to relevant study record(s)
- Endpoint:
- boiling point
- Type of information:
- experimental study
- Adequacy of study:
- key study
- Study period:
- 2007-08-28 to 2007-09-05
- Reliability:
- 1 (reliable without restriction)
- Rationale for reliability incl. deficiencies:
- guideline study
- Qualifier:
- according to guideline
- Guideline:
- EU Method A.2 (Boiling Temperature)
- Version / remarks:
- Cited as Directive 92/69/EEC, A.2
- Principles of method if other than guideline:
- Method 103 of the OECD guideline for testing of chemicals
- GLP compliance:
- yes
- Type of method:
- differential scanning calorimetry
- Key result
- Boiling pt.:
- 115 °C
- Atm. press.:
- 1 021 hPa
- Decomposition:
- yes
- Decomp. temp.:
- >= 165 - <= 267 °C
- Conclusions:
- The boiling temperature of the aqueous solution of ammonium thioglycolate has been determined to be 388 +/- 1.0 K at 102.1 kPa.
Reference
Thermogramms are shown in figure 5.1 and 5.2. See attached
document.
Residue: Black, shiny residue
Mean boiling temperature: 388 K
Atmospheric pressure: 102.1 kPa
Decomposition: 165 to 267 °C
Description of key information
Boiling point: 115°C at 1021 hPa for aqueous solution of 70% ammonium thioglycolate in water (EU method A2, ASTM E537 -86).
Key value for chemical safety assessment
- Boiling point at 101 325 Pa:
- 115 °C
Additional information
The boiling temperature of aqueous solution of 70% ammonium thioglycolate in water has been deterimed to be 388± 1.0 K (115°C) at 1021 hPa by using EU method A2 (ASTM E537 -86) and OECD method 103. The substance decomposes at 165 to 267°C.
The boiling temperature of ammonium thioglycolate (waterfree salt) was calculated using the program MPBPWIN 1.42: 355.91°C (629.07K) with an uncertainty of 14°C.
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