cascorbic coated powder

APPEARANCE                    WHITE OR ALMOST WHITE,CRYSTALLINE POWDER                        

 IDENTIFICATION                  POSITIVE                        

MELTING POINT                 ABOUT **0°C                   

pH(5%,W/V)                      2.1~2.6                        

SPECIFIC OPTICAL ROTATION     **0.5°~*1.5°                  

CLARITY AND COLOR OF SOLUTION    CLEAR, ≤BY7                  

COPPER                         ≤0.***3%                       

HEAVY METALS                 ≤0.**1%                          

IRON                           ≤0.***2%                        

MERCURY                       ≤0.***1%                      

ZINC                            ≤0.***5%                        

ARSENIC                         ≤0.***3%                        

LEAD                           ≤0.***2%                          

OXALIC ACID                     ≤0.2%                          

LOSS ON DRYING               ≤0.1%                            

SULPHATED ASH                 ≤0.1%                            

ASSAY                          *9.0~ **0.5%                    

ORGANIC VOL.IMPURITIES      MEET THE REQUIREMENTS