- Appearance : yellow powder
- Particle size ≤ 100 Mesh
- Degree of Deacetylation (%DD) ≥ 85 %
- Average Molecular Weight ≤ 5 000 Da
- Moisture Content ≤10%
- Ash content : ≤ 1%
- Insolubles ≤ 1% @ 35℃
- Density ≥ 0.25g/mL
- ph : 5 - 7
- As (Arsenic) ≤ 1 ppm
- Total Heavy metals ≤ 10 ppm