| Specification | ||
| Test I tem | S pecification | T est Method | 
| Appearance | Yellow to orange crystalline powder | Visual | 
| Identification | ||
| Ultraviolet Absorption | AR256R/AR365R is 2.80-3.00 | USP 38 | 
| Water | Max 8.5% | USP 38 | 
| Residue on ignition | Max 0.3% | USP 38 | 
| Assay | 97.0~102.0% | USP 38 | 
 
 
 
