Use of this information is subject to copyright laws and may require the permission of the owner of the information, as described in the ECHA Legal Notice.
EC number: 905-806-4
CAS number: -
The half-life of 4,4'-MDI in the atmosphere has been estimated using the
AOPWIN (TM) (v1.92) model and was 0.92 days (Pemberton and Tury, 2008).
There are no measured phototransformation data in air for the test
substance. According to Pemberton and Tury (2008), the estimated
dissipation half-life has been rounded off to 1 day. The exactly
calculated value is 0.92 days.
This result was corroborated with a phototransformation analysis of a
structural analogue 4-tolylisocyanate (PTI) (Carter et al., 1999). The
phototransformation was determined using the relative rate method where
the rates of consumption of PTI relative to a reference compound with a
known OH radical rate constant were measured in the presence of OH
radical source. The environmental chamber system employed was the
Dividable Teflon Chamber. This gave a phototransformation half-life of
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.Reproduction or further distribution of this information may be subject to copyright protection. Use of the information without obtaining the permission from the owner(s) of the respective information might violate the rights of the owner.
Welcome to the ECHA website. This site is not fully supported in Internet Explorer 7 (and earlier versions). Please upgrade your Internet Explorer to a newer version.
Do not show this message again