質(zhì)量標準:
1 熔點            　219-224℃                                                                  
2 氯化物　　   ≤0.01%                                                                         
3 水分               ≤0.5%                                                                          
4 重金屬           ≤0.0015%                                                                   
5 灼燒殘渣       ≤0.2%                                                                         
6 紅外               符合                                                                          
7 指標               ≥98.0%干品計
8 外觀               嫩黃色結(jié)晶或結(jié)晶性粉末，無臭。