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EC number: 200-521-5
CAS number: 61-82-5
Key study,guideline OECD 209, K2:
NOEC (3h)= 1000 mg/L
The effects of Amitrole on the respiration rate of microorganisms
contained in activated sludge after a contact of 3 h was assessed in
accordance with OECD guideline 209, "Activated sludge, respiration
inhibition test" (1984).
Amitrole was tested at concentrations of 1000, 316, 100, 31.6 and 10
mg/L. There was no decrease in oxygen consumption observed in any of the
concentrations tested. The 3h EC50can
therefore be concluded to be above 1000 mg/L. The reference material 3.5
-dichlorophenol was tested at concentrations of 30, 15 and 5 mg/L. The
3h EC20, EC50and
EC80vlaues were calculated to be 6.3,
10.7, and 18.0 mg/L respectively.
The respiration rates for the 2 control vessels were within 15% of each
other, and the EC50 of the reference material was in the range 5 to 30
mg/L, meeting the criteria for a valid test.
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