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: 200-543-5
CAS number: 62-56-6
In the test, thiourea was adsorbed on silica gel and
irradiated with light (290 nm). Volatile compounds, as well as CO2, were
analysed after irradiation.
At a wavelength of 290 nm thiourea is degraded to 4.7
% (test duration not reported).
Meylan & Howard conducted a computer estimation of
the atmospheric gas-phase reaction rate of organic compounds with
hydroxyl radicals and ozone.
The rate constant for the vapour-phase reaction of
thiourea with photochemically-produced hydroxyl radicals has been
estimated as 4.2X10-11 cu cm/molecule-sec at 25 °C using a structure
estimation method, corresponding to an atmospheric half-life t1/2 of
about 3 h at an atmospheric concentration of 5X10+5 hydroxyl radicals
per cu cm.
Under the conditions of the GSF test, Schmidt-Bleek
et al. (1982) report that thiourea is photochemically degraded to 0.23 %
(test duration not reported).
An atmospheric half-life t1/2 of about 3 hours at an atmospheric concentration of 5X10+5 hydroxyl radicals per cu cm is reported for thiourea.
Available literature on phototransformation of
thiourea in air reports that the substance is degraded from 0.23% to
4.7% under the conditions of the GSF test (Schmidt-Bleek et al., 1982)
and when irridiated at a wavelength of 290 nm (Freitag et al., 1985),
respectively. The total test duration for these two experiments is
In addition, Meylan & Howard (1993; as cited in the
Hazardous Substances Data Bank) determined an atmospheric half-life t1/2
of about 3 hours at an atmospheric concentration of 5X10+5 hydroxyl
radicals per cu cm.
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.
Esta web utiliza cookies para mejorar su experiencia de navegación en nuestros sitios web.
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