| Appearance |
White to off-white powder |
Visual inspection |
| Identification |
Consistent with authenticated reference |
FTIR fingerprint comparison |
| Phytate content |
≥90.0% of dry organic fraction |
Calibrated ion chromatography |
| Calcium |
17.0-25.0% w/w, dry basis |
ICP-OES after digestion |
| Phosphorus |
18.0-23.0% w/w, dry basis |
ICP-OES after digestion |
| Loss on drying |
≤12.0% w/w |
Gravimetry, 105 C to constant mass |