Annex of Approved Active Substances for Plant Protection Products

This list contains the annex of active substances contained in Regulation 540/2011/EU, separated into Part A (deemed to have been approved under Regulation 1107/2009/EC), Part B (approved under Regulation 1107/2009/EC), and Part C (basic substances approved under Regulation 1107/2009/EC). Entries include common name, IUPAC name, identification numbers (e.g., CAS, CIPAC), purity information, and dates of approval and approval expiration, as well as specific provisions.


EC / List no: 205-632-2 CAS no: 144-54-7
Ref No.
990.0 g/kg
on a dry weight basis
Expressed As
As metam-potassium
Date of approval
1 July 2012
Expiration of approval
30 June 2022
B Active substances approved under Regulation (EC) No 1107/2009
Only uses as nematicide, fungicide, herbicide and insecticide may be authorised for application as soil fumigant prior to planting, limited to one application every third year on the same field; The application may be authorised in open field by soil injection or drip irrigation, and in greenhouse by drip irrigation only; The use of gas-tight plastic film for drip irrigation shall be prescribed; Authorisations shall be limited to professional users
1 Please refer the original source document for applicable additional specific provisions (

131 Relevant impurities: methylisothiocyanate (MITC): max. 12 g/kg on dry weight basis (metamsodium), max. 0,42 g/kg on dry weight basis (metampotassium). N,N'-dimethylthiourea (DMTU): max. 23 g/kg on a dry weight basis (metamsodium), max. 6 g/kg on a dry weight basis (metampotassium).

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