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: 216-407-3
CAS number: 1576-35-8
p-TSH is not readily biodegradable according to OECD Guideline no. 301C.
The hydrolytic half life of p-TSH at 20 °C was:
138.63 h at pH 4
38.51 h at pH 7
40.77 h at pH 9
These data suggest that p-TSH will degrade hydrolytically at
environmentally relevant pH and temperature conditions. The primary
degradation products are hydrazine and p-Toluenesulfonic acid.
Once released into the water environment, p-TSH will readily - due to
hydrolysis - be degraded into primarily hydrazine and p-Toluenesulfonic
Some retention of the waste water within in the industrial settings can
be expected. The travelling time from p-TSH is released into waste water
until arrival in the STP can vary quite much - in dependence of the
distance to plant and the flow velocity. Typically, the flow velocity in
the sewer is about 1 m/s, and with an average distance between the point
of discharge and STP of 10 km, a retention time in the sewer of
approximately 3 hours is calculated. In the sewer, a pH above 7 is usual
(in order to limit the concentration of free H2S and to limit
the corrosion due to the presence of sulfuric acid).
The overall retention time in a standard SimpleTreat sewage treatment
plant (STP) is approximately 15 hours. Overall, a total retention time
of 1 day = 24 hours is assessed to be a reasonable value to apply for
the risk assessment. A pH between 7 - 8 is expected in the sewer and the
sewage treatment plant.
In conclusion, a total hydrolytic transformation of approximately 65%
before final discharge into the environment is assessed to be a
reasonable value to use for the environmental risk assessment.
The hydrolytic half life of p-TSH at 20 degrees celcius was:
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