Registration Dossier
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EC number: 682-238-0 | CAS number: 1190931-27-1
Henry's Law constant
Administrative data
Link to relevant study record(s)
- Endpoint:
- Henry's law constant
- Type of information:
- calculation (if not (Q)SAR)
- Adequacy of study:
- key study
- Study period:
- November 2020
- Reliability:
- 2 (reliable with restrictions)
- Rationale for reliability incl. deficiencies:
- accepted calculation method
- Qualifier:
- according to guideline
- Guideline:
- other: Guidance on Information Requirements and Chemical Safety Guidance on information requirements and Chemical Safety Assessment Chapter R.16: Environmental exposure assessment
- Version / remarks:
- 3.0. (February 2016)
- Deviations:
- no
- Qualifier:
- according to guideline
- Guideline:
- other: European Commission Technical Guidance Document on Risk Assessment PART II
- Version / remarks:
- 2003
- Deviations:
- no
- Key result
- H:
- 0 Pa m³/mol
- Temp.:
- 20 °C
- Conclusions:
- The Henry's Law constant of cC6O4 ammonium salt at 20°C is calculated to be 1,37 E-08 Pa m3 mol-1.
- Executive summary:
The Henry's Law constant of cC6O4 ammonium salt is calculated according to the equation described in the European Commission Technical Guidance Document on Risk Assessment (EC TGD on RA)
PART II (2003) and in the ECHA Guidance on Information Requirements and Chemical Safety Guidance on information requirements and Chemical Safety Assessment Chapter R.16 (2016).
The input values are the molecular weight, the vapour pressure and the water solubility values at the temperature of 20°C.
The vapour pressure at 20°C is obtained by the Antoine equation based on experimental measurements conducted in the temperature range of 34 °C - 66 °C (details are reported in section 4.6)
The water solubility at 20°C is calculated from the experimental value determined at 21.7°C by the equation described in the EC TGD Part II.
The Henry's Law constant at 20°C of cC6O4 ammonium salt is calculated to be 1,37 E-08 Pa m3 mol-1.
Reference
Description of key information
The Henry's Law constant at 20°C of cC6O4 ammonium salt is calculated to be 1,37 E-08 Pa m3 mol-1 according to the equation described in the European Commission Technical Guidance Document (EC TGD) on Risk Assessment PART II (2003) and in the ECHA Guidance on Information Requirements and Chemical Safety Guidance on information requirements and Chemical Safety Assessment Chapter R.16 (2016).
Key value for chemical safety assessment
- Henry's law constant (H) (in Pa m³/mol):
- 0
- at the temperature of:
- 20 °C
Additional information
According to European Commission Technical Guidance Document (EC TGD) on Risk Assessment PART II (2003) and in the ECHA Guidance on Information Requirements and Chemical Safety Guidance on information requirements and Chemical Safety Assessment Chapter R.16 (2016) the volatile chemicals from water are those having HLC > 250 Pa m3 mol-1.
Being the HLC of cC6O4 ammonium salt significanltly lower than the 250 Pa m3 mol-1 treshold value, significant volatilization of cC6O4 ammonium salt from water can be excluded.
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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