Registration Dossier

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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.

The new ECHA CHEM database has been released by ECHA, and it now contains all REACH registration data. There are more details on the transition of ECHA's published data to ECHA CHEM here.

Diss Factsheets

Administrative data

Endpoint:
other distribution data
Type of information:
calculation (if not (Q)SAR)
Remarks:
Migrated phrase: estimated by calculation
Adequacy of study:
other information
Reliability:
4 (not assignable)
Rationale for reliability incl. deficiencies:
results derived from a valid (Q)SAR model, but not (completely) falling into its applicability domain, and documentation / justification is limited

Data source

Reference
Reference Type:
other: data assessment
Title:
Unnamed
Year:
2010
Report date:
2010

Materials and methods

Test guideline
Qualifier:
no guideline followed
Principles of method if other than guideline:
Calculation of volatilization from water based on calculated HLC (experimental VP/estimated water solubility; ECT, 2009)
GLP compliance:
no
Type of study:
volatility
Media:
water - air

Test material

Constituent 1
Chemical structure
Reference substance name:
Nonanoic acid
EC Number:
203-931-2
EC Name:
Nonanoic acid
Cas Number:
112-05-0
Molecular formula:
C9H18O2
IUPAC Name:
nonanoic acid

Results and discussion

Any other information on results incl. tables

Henry's Law Constant (HLC) at 25 °C: 1.62E-06 atm*m³/mol = 0.164 Pa*m³/mol

Using this HLC and the conditions indicated below the following half-lives for volatilization from rivers and lakes were calculated:

 

River 

Lake

Water depth (m)

1

1

Wind velocity (m/sec)

5

0.5

Current velocity (m/sec)

1

0.05

Half-life (hours)

455.9

5079

Half-life (days )

19

211.6

Applicant's summary and conclusion

Conclusions:
An experimental Henry's Law Constant (HLC) of 0.164 Pa*m³/mol at 25 °C was reported from the EPI Suite v4.00 database. Taking this value, volatilization half-lives of 19 and 211 days were estimated for a model river and a model lake, respectively.