Overview
ISO 22862:2021 - "Fertilizers and soil conditioners - Compound fertilizer - General requirements" defines general requirements for inorganic solid compound fertilizers covering testing, sampling, test-sample preparation, marking/labelling, packaging, transport and storage. It does not apply to controlled‑release compound fertilizers. The standard is intended to ensure reliable declaration of nutrient content, safe handling and traceable quality control across manufacturing, laboratory testing and commercial distribution.
Key topics and technical requirements
- Scope & definitions: Compound fertilizer = product with at least two primary nutrients (N, P, K). Terms follow ISO 8157.
- Nutrient content requirements: Min. total primary nutrient mass fractions given for binary (NP/NK/PK) and ternary (NPK) products (see standard). Individual primary nutrients normally ≥ 3% and declared values must conform to defined tolerances (±20% relative deviation up to a max absolute 1.5% per nutrient). Total negative deviation limits are specified for binary and ternary products.
- Particle size: Typical particle size distributions required (e.g., 1.00–4.75 mm or 3.35–5.60 mm) with ≥ 80% in range; alternative sizes may be negotiated between buyer/seller.
- Analytical methods: Prescribes recognized test methods (references include ISO 5315/5314/20620 for nitrogen, EN 15957/ISO 15959/6598/22018 for phosphorus, ISO 5317/17319 for potassium, ISO 760 for water, ISO 8397 for sieving, ISO 17318 for heavy metals).
- Sampling & test sample preparation: Procedures for bagged and bulk products and reduction/preparation per ISO 14820‑1 and ISO 14820‑2. Sample labelling requirements (manufacturer, product, batch, lot size, sampling date/place, sampler signature, etc.).
- Marking & labelling: Conformance with ISO 7409 and the Globally Harmonized System (GHS). Labels must show nutrient composition, forms/solubilities and fineness; phosphorus and chloride content labelling specifics are noted.
- Packaging, transport & storage: Avoid moisture, sunlight and physical damage; store in dry, cool conditions.
- Contaminants: Heavy metal limits referenced; Annex A gives examples (e.g., China GB 38400, EU Regulation 2019/1009), but specific limits are subject to national/regional regulation.
Applications and users
ISO 22862 is useful to:
- Fertilizer manufacturers and formulators for product specification and quality control
- Analytical laboratories performing fertilizer testing
- Regulatory authorities and inspectors reviewing declarations and compliance
- Importers, distributors and traders managing labeling, transport and storage
- Agronomists and large-scale users requiring consistent product quality
Keywords: ISO 22862, compound fertilizer standard, fertilizer testing, sampling, nutrient declaration, particle size, heavy metals, labelling, packaging, inorganic solid compound fertilizers.
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