| Items | Standard | Analyze Result |
| Appearance | White powder | White powder |
| Content, % | 99.0 min | 99.28 |
| Loss on drying, % | 10 max | 9.35 |
| Residue on ignition, % | 0.10 max | 0.057 |
| Tannin test, ppm | 1 max | Qualified |
| Chrominance, APHA | 180 max | 130 |
| Conclusion | Qualified | |
(1) Applied in food filed, gallic acid can be produced into wine, canned, condensed juice and other
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