Methods for relevant impurities becoming more and more important in the quality control of TK/TC and FAO-specifications. In order to meet an urgent need for methods to characterise TK/TC in a.i. and formulations, CIPAC provides selected methods as download. By downloading these methods you accept the following conditions of use:

• These methods are provided subject to changes without prior notice.
• The copyright of these methods is with CIPAC.
• CIPAC declines any responsibility when using these methods.

Methods for determination of relevant impurities in active substances:

• Terpyridines in diquat
• Terpyridines in paraquat
• S-methylfenitrothion in fenitrothion
• Tetramethyl pyrophosphorothioate (TMPP) in fenitrothion
• 1-chloro-2-methylpropene (1-CMP) and 3-chloro-2-methylpropene (3-CMP) in methylcyclopropene (1-MCP)
• 1,3-bis(4-trifluoromethoxyphenyl)urea and 4-(trifluoromethoxy)aniline in triflumuron
• 1R-trans-permethric acid anhydride in transfluthrin
• Prothioconazole-desthio in prothioconazole
• CGA 344605 in trifloxystrobin