Raw Honey Guide · EU HMF compliance
How fresh is your honey after storage?
Set the storage temperature, duration, and initial HMF to estimate EU compliance over time — powered by Arrhenius kinetics (Tosi et al. 2008).
20 °C
12 months
10 mg/kg
Estimated HMF now
14.9mg/kg
Excellent freshness
Well within the EU standard blossom honey limit (≤ 40 mg/kg). Typical of raw honey packaged within the harvest year.
Model equation
k(T) = 0.013 × exp(150 000/8.314 × (1/293 − 1/T)) [mg/kg/day] HMF(t) = HMF₀ + k(T) × t k at 20 °C = 0.01342 mg/kg/day
Source: Tosi et al. (2008) Food Chem 102:375–383. Eₐ = 150 kJ/mol. Assumes pH ~3.9, moisture ~18.5%.
EU Directive 2001/110/EC — compliance timeline at 20 °C
| Limit | Threshold | Time to exceed | Scope |
|---|---|---|---|
| EU standard | 40 mg/kg | 6.1 yr | Blossom, most honeys |
| EU tropical | 80 mg/kg | 14.3 yr | Tropical origin, industrial |
| US (USDA) | No limit | — | Grade Standards silent on HMF |
Limitations: Model assumes constant temperature, pH ≈ 3.9, moisture ≈ 18.5%, and Apis mellifera blossom honey. Lower pH or higher moisture accelerates HMF formation. Heather, honeydew, and Meliponini honeys have different initial HMF ranges and formation kinetics. Use alongside a refractometer and diastase test for full quality assessment. Full HMF + diastase guide →
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