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EC number: 200-543-5
CAS number: 62-56-6
Thiourea is non-toxic to earthworms. Two
28-d studies on the toxicity to Eisenia foetida (endpoint
recorded: mortality) are available, reporting LC50 values
above 1000 mg/kg substrate (Korte & Freitag, 1984) and equal to 3,550
mg/kg substrate (Friesel et al., 1984), respectively.
Several plant species were tested in the
plant toxicity assessment of thiourea. The most sensitive reliable EC50
(10 d) of 52.1 mg/kg soil dw is reported by Günther & Pestemer (1990).
The toxicity of thiourea to soil
microorganisms was investigated in several studies (Lashen & Starkey,
1970; Pandey et al. 1976; Zacherl & Amberger, 1990; Kubota & Asami,
1985). It could be shown that thiourea is toxic to soil microorganisms
and inhibits growth as well as nitrification. Acclimatisation to
thiourea occurs over time and thiourea can be decomposed.
Besides, five study abstracts were available
for review that describe the chemosterilising effects of thiourea on
beetles and flies (Shanker at al., 1990; Pandey & Pandey, 1991; Bhide,
1991; Chaudhry &Tripathi, 1976; Deepak & Chaudhry, 1979). The
terrestrial invertebrates examined in these studies all live
above-ground and are therefore outside the scope of REACH (see ECHA
Guidance Document R.7c, p. 105). This information is of supplemental
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.
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