- Allulose assay
- Allulose purity on a dry basis by HPLC, with other sugars (fructose, glucose) reported; this confirms you are paying for allulose and not residual fructose.
- Moisture or dry solids
- Loss on drying for crystals; dry solids or Brix for syrup, which sets how much allulose each kilogram delivers.
- pH, color and ash
- pH and color (for example ICUMSA or absorbance) for syrup, plus ash; color can rise with heat and age because allulose browns readily.
- Heavy metals
- Lead and other metals, typically reported against the supplier's specification or food-chemical limits.
- Microbiology
- Total plate count, yeast and mold, coliforms, and pathogens such as Salmonella, especially important for syrups with higher water activity.
- Particle size
- Sieve analysis for crystalline grades, which affects dissolution, mouthfeel and flow in dry blends.