FAO/WHO JMPS Specifications: A Common Technical Baseline
The FAO/WHO Joint Meeting on Pesticide Specifications (JMPS) publishes consensus technical specifications for agricultural pesticides (FAO) and public-health pesticides (WHO).
In Short
- An FAO/WHO specification has two parts: the technical material (TC or TK) specification — assay, manufacturing impurities of toxicological or environmental concern…
- FAO/WHO equivalence rests on a 5-batch reference impurity profile of the technical active.
- WHO Prequalification for vector-control pesticides (mosquito coils, larvicides, indoor residual sprays, long-lasting insecticidal nets) is administered under the WHO…
Most developing-country regulators without independent registration capacity adopt the FAO/WHO specification as the import baseline. For a manufacturer whose first-tier markets are EPA and EU, an FAO/WHO specification is the most efficient way to clear 80+ secondary markets without a per-country dossier. This guide walks the specification structure, the equivalence determination, and the practical work to maintain it.
What an FAO/WHO specification covers
An FAO/WHO specification has two parts: the technical material (TC or TK) specification — assay, manufacturing impurities of toxicological or environmental concern (relevant impurities), water content, acidity/alkalinity — and the formulated product specification (EC, SC, WG, etc.) — active content, physical-chemical properties relevant to the formulation type, storage stability. The Manual on Development and Use of FAO and WHO Specifications for Pesticides (current 3rd revision of the 1st edition) is the procedural reference.
The reference profile and the equivalence determination
FAO/WHO equivalence rests on a 5-batch reference impurity profile of the technical active. A new manufacturer's profile is compared at two tiers: Tier 1 (chemical) — relevant impurities and assay within JMPS limits; Tier 2 (toxicological) — additional acute tox endpoints triggered when Tier 1 fails.
Common gap. The recurring failure: a sourcing change that passes EPA notification but breaks the FAO equivalence on relevant impurity Y.
More on the reference profile and the equivalence determination
Equivalence is granted at the JMPS evaluation meeting and listed on the FAO/WHO specification.
Public-health pesticides: WHOPES and the prequalification pathway
WHO Prequalification for vector-control pesticides (mosquito coils, larvicides, indoor residual sprays, long-lasting insecticidal nets) is administered under the WHO Prequalification Team — Vector Control (PQT-VC), which absorbed WHOPES in 2017. Manufacturers seeking access to UNICEF, Global Fund and Roll Back Malaria procurement need PQT-VC listing, which requires an FAO/WHO specification, GMP compliance and an active dossier.
More on public-health pesticides: WHOPES and the prequalification pathway
The 2024–2026 PQT-VC pipeline is dominated by next-generation LLINs and novel-mode-of-action larvicides.
Co-Formulant and Adjuvant Transparency
FAO/WHO formulated product specifications require disclosure of co-formulants in the JMPS confidential dossier, even where co-formulants are confidential business information in the public specification. The 2022–2024 JMPS reform raised the bar on co-formulant safety data, aligning with EU 1107/2009 Annex III.
More on co-Formulant and Adjuvant Transparency
Manufacturers using outdated co-formulant lists from pre-2020 specifications need to refresh.
A 60-day FAO/WHO readiness path
- Days 1–10
inventory each active × source against current FAO/WHO specifications; identify gaps and stale specifications (>10 years without revision).
- Days 11–25
refresh the 5-batch reference impurity profile for the primary source.
- Days 26–40
validate the formulated product specification against the current Manual; close co-formulant data gaps.
- Days 41–55
rehearse the equivalence determination from a hypothetical source change.
- Days 56–60
prepare the JMPS evaluation meeting submission for the next cycle.
Questions
Is an FAO/WHO specification a registration?
No — it is a technical consensus document. Registration is granted by the importing country's authority, but most secondary markets accept the FAO/WHO specification as the import baseline without an independent dossier review.
How long does FAO/WHO equivalence determination take?
Typically 12–18 months from complete dossier submission to JMPS meeting decision. JMPS meets twice a year (typically May and October).
What is a relevant impurity?
An impurity that, at the manufacturing-process level, is of toxicological or environmental concern and must be limited in the specification (e.g., HCB in chlorothalonil, EDB in glyphosate). The relevant-impurity list per active is fixed in the FAO/WHO specification.
Can a generic manufacturer obtain a separate FAO/WHO specification?
Yes — through the equivalence determination route. The generic's 5-batch profile is compared to the reference profile (typically the originator's at first listing) and granted equivalence if Tier-1 and Tier-2 criteria are met.
Practical orientation, not legal advice. Rules differ by jurisdiction; your quality and compliance team decides what applies.
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Global Agrochemical Quality & Compliance Readiness Guide- Biopesticide & Microbial Registration Readiness Guide
Pesticide Residue Limits for Exporters: EU 396/2005 and US Tolerances
EPA Pesticide Establishment Readiness: Registration, Annual Reports and Records
EU REACH for Agrochemicals: 1907/2006 Meets 1107/2009
Pesticide Product Registration: FIFRA Section 3 and EU 1107/2009