Annex of Approved Active Substances for Plant Protection Products

EU. Annex of Approved Active Substances, Regulation 540/2011/EU implementing Regulation 1107/2009/EC, last amended by Implementing Regulation (EU) 2024/324, OJ L of 22 January 2024

This list contains the active substances approved under Regulation 1107/2009/EC, as listed in Regulation 540/2011/EU. The list is separated into five parts: Part A (deemed to have been approved under 1107/2009/EC); Part B (approved under 1107/2009/EC); Part C (basic substances); Part D (low-risk active substances); and Part E (candidates for substitution). Entries include common & IUPAC names, identifiers (e.g., CAS, CIPAC), purity information, and approval and approval expiration dates.


EC / List no: 205-632-2 CAS no: 144-54-7
Ref No.
990 g/kg
on a dry weight basis
Expressed As
As metam-potassium
Date of approval
1 July 2012
Expiration of approval
30 November 2025
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 to the original source document ( and subsequent amendments 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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Name EC / List no. CAS no. Association
Methyldithiocarbamic acid 205-632-2 144-54-7 Official source
Metam-sodium 205-293-0 137-42-8 Official source