Viscosity
Primary indicator. Brookfield viscometer at 25°C, 1% solution. Standard: 4,500–6,000 cps. Batch consistency as important as absolute value.
Composition
Galactomannan min 85%. Moisture max 12%. Ash max 1.5%. Protein max 3%. Acid insolubles max 2%.
Safety
Heavy metals (Cu+Zn) max 20 ppm. Microbiological: total plate count, yeast/mold, Salmonella, E. coli testing.
Physical
Particle size (mesh analysis), color (L*a*b*), bulk density. Spray-dried = best color (highest L*), finest particles.
Dissolution
Hot: 86°C/10 min. Cold: 25°C. Predicts manufacturing performance.