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Environmental fate & pathways

Henry's Law constant

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Description of key information

From the water surface, the substance will slowly evaporate into the atmosphere.
H = 34.07 Pa*m³/mol

Key value for chemical safety assessment

Additional information

Using SRC HENRYWIN v.3.20, a Henry's Law Constant of 25.955 Pa*m³/mol was estimated (BASF SE 2010). Another calculation of Henry´s Law constant based on measured water solubility and vapour pressure resulted in a slightly higher value, H = 34.07 Pa*m³/mol. Therefore, cyclohexyl methacrylate is expected to slowly evaporate from the water surface into the atmosphere.

QSAR-disclaimer

 

In Article 13 of Regulation (EC) No 1907/2006, it is laid down that information on intrinsic properties of substances may be generated by means other than tests, provided that the conditions set out in Annex XI (of the same Regulation) are met. Furthermore according to Article 25 of the same Regulation testing on vertebrate animals shall be undertaken only as a last resort.

 

According to Annex XI of Regulation (EC) No 1907/2006 (Q)SAR results can be used if (1) the scientific validity of the (Q)SAR model has been established, (2) the substance falls within the applicability domain of the (Q)SAR model, (3) the results are adequate for the purpose of classification and labeling and/or risk assessment and (4) adequate and reliable documentation of the applied method is provided.

 

For the assessment of cyclohexyl methacrylate (Q)SAR results were used for Henry's Law constant. The criteria listed in Annex XI of Regulation (EC) No 1907/2006 are considered to be adequately fulfilled and therefore the endpoint(s) sufficiently covered and suitable for risk assessment.

 

Therefore, further experimental studies on Henry's Law constant are not provided.