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COA OF Ascorbic Acid Vitamin C ITEM STANDARD Appearance White or almost white crystal or crystalline powder Identification Positive Melting point 191 C ~ 192C pH (5%, w/v) 2.2 ~ 2.5 pH (2%,w/v) 2.4 ~ 2.8 Specific optical rotation +20.5 ~ +21.5 Clarity of solution Clear Heavy metals ≤0.0003% Assay (as C 6H 8O6, %) 99.0 ~ 100.5 Copper ≤3 mg/kg Iron ≤2 mg/kg Mercury ≤1 mg/kg Arsenic ≤2 mg/kg Lead ≤2 mg/kg Oxalic acid ≤0.2% Loss on drying ≤0.1% Sulphated ash ≤ 0.1% Residual

Vitamin c (Vitamin c, Ascorbic Acid), also known as l-Ascorbic acid, is a water-soluble vitamin that is rich in fruits and vegetables. Plays a role in redox metabolism, the lack of it can cause scurvy. COA OF Ascorbic Acid Vitamin C ITEM STANDARD Appearance White or almost white crystal or crystalline powder Identification Positive Melting point 191 C ~ 192C pH (5%, w/v) 2.2 ~ 2.5 pH (2%,w/v) 2.4 ~ 2.8 Specific optical rotation +20.5 ~ +21.5 Clarity of solution Clear

Vitamin c (Vitamin c, Ascorbic Acid), also known as l-Ascorbic acid, is a water-soluble vitamin that is rich in fruits and vegetables. Plays a role in redox metabolism, the lack of it can cause scurvy. Under normal circumstances, most vitamin c metabolism in the body break down into oxalic acid or sulfuric acid in combination with Ascorbic acid -2-acid urine, another part can be directly excreted by urine COA OF Ascorbic Acid Vitamin C ITEM STANDARD Appearance White or almost