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Please be aware that this old REACH registration data factsheet is no longer maintained; it remains frozen as of 19th May 2023.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

Environmental fate & pathways

Henry's Law constant

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Administrative data

Endpoint:
Henry's law constant
Type of information:
migrated information: read-across based on grouping of substances (category approach)
Adequacy of study:
supporting study
Reliability:
2 (reliable with restrictions)
Rationale for reliability incl. deficiencies:
other: Calculation based on ECHA guidance.

Data source

Reference
Reference Type:
other: REACH Guidance
Title:
Chapter R.16: Environmental Exposure Estimation
Author:
European Chemicals Agency
Year:
2008
Bibliographic source:
Guidance on Information, Requirements, and Chemical Safety Assessment

Materials and methods

Principles of method if other than guideline:
Calculated from vapour pressure (3.5E-6 Pa), solubility (5400 mg/L) and MW (166.13 g/mol) using EQUATION R.16-10 (HENRY = (VP*MW/Solubility).

Test material

Constituent 1
Chemical structure
Reference substance name:
Isophthalic acid
EC Number:
204-506-4
EC Name:
Isophthalic acid
Cas Number:
121-91-5
Molecular formula:
C8H6O4
IUPAC Name:
benzene-1,3-dicarboxylic acid

Results and discussion

Henry's Law constant H
H:
0 other: Pa m³/mol (1.08E-7)

Applicant's summary and conclusion

Conclusions:
Henry's Law constant (calculated) for isophthalic acid = 1.08E-7 Pa m³/mol
Executive summary:

Henry's Law constant (calculated) = 1.08E-7 Pa m³/mol. Calculated from vapour pressure (0.0000035 Pa), solubility (5400 mg/L) and MW (166.13 g/mol) using EQUATION R.16 -10 (HENRY = (VP*MW/Solubility).