CAS No.: 56181-66-9 | C22H20O Registered in China
- Name: Difenacoum Stage 6 (last intermediate)
Mol. Formula: C22H20O
CAS No.: 56181-66-9
EC No.: 260-034-9
Purity of limited stock: ≥ 99.7%
- IUPAC name: 3-[1,1′-biphenyl]-4-yl-1,2,3,4-tetrahydro-1-naphthol
China Reg. name: 3-[1,1′-biphenyl]-4-yl-1,2,3,4-tetrahydro-1-naphthol
China’s Regulatory: MEP Directive No. 7/2010
New Substances Registration No.: 2011009/MEP
Registration Date at China MEP: 12. JAN, 2011
Difenacoum was completely terminated in China since 2005
- According to the National Industrial Policy “Regulations on Promoting Industrial Structure Adjustment” with the detailed Directive – “Directory for Guiding Industry Restructuring (2005)” that came into effect on December 2, 2005, new production of highly toxic pesticides is prohibited in China.
- When the plant was expanded in 2004, the environmental and safety assessment for the production of Difenacoum, based on the existing production line for Brodifacoum, was audited and pre-approved for production by the authorities (Difenacoum is synthesized in the same manner as Brodifacoum but without bromine in initiation). Unfortunately, the MOA registration was not completed before 2005, when the National Industrial Policy was introduced. The evaluated Difenacoum line is therefore only licensed to produce some intermediates to meet overseas demand.
Registered Difenacoum intermediate: C22H20O
(the last stage before synthesis with coumarin)
- On January 12, 2011, C22H20O, the final intermediate of Difenacoum manufactured by Siyang Rodenticide Factory, passed the environmental and safety assessment of China’s REACH regulation as a new chemical substance.
- Siyang Rodenticide Factory has produced some intermediates of Difenacoum (the stage before synthesis with coumarin, C22H20O) for export. There are limited stocks and it fully complies with all Chinese laws and regulations.
