How much zinc PCA gives us 1g zinc like the ordinary Niacinamide 10% + Zinc 1%

The ordinary Niacinamide 10% + Zinc 1% 

LOI 
Aqua (Water), Niacinamide, Pentylene Glycol, Zinc PCA, Dimethyl Isosorbide, Tamarindus Indica Seed Gum, Xanthan gum, Isoceteth-20, Ethoxydiglycol, Phenoxyethanol, Chlorphenesin. 

How much zinc PCA in a formula like this equals 1% zinc? 
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Comments

  • PharmaPharma Member, Pharmacist
    1%/MW of Zn*MW of zinc PCA
  • AbdullahAbdullah Member
    Pharma said:
    1%/MW of Zn*MW of zinc PCA
    MW of zinc PCA 321.59484000
    MW of zinc 65.38

    So 4.9188565310492g of zinc PCA gives us 1g zinc. 
    Am i correct?
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