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.

02040608010006mo1yr18mo2yr30mo3yr80 mg/kg (EU tropical)40 mg/kg (EU blossom limit)14.9 mg/kgMonths storedHMF (mg/kg)

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

LimitThresholdTime to exceedScope
EU standard40 mg/kg6.1 yrBlossom, most honeys
EU tropical80 mg/kg14.3 yrTropical origin, industrial
US (USDA)No limitGrade 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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