Difco™ Marine Agar 2216 Approximate Formula / Per Liter Peptone / 5.0 g Yeast Extract / 1.0 g Ferric Citrate / 0.1 g Sodium Chloride / 19.45 g Magnesium Chloride / 8.8 g Sodium Sulfate / 3.24 g Calcium Chloride / 1.8 g Potassium Chloride / 0.55 g Sodium Bicarbonate / 0.16 g Potassium Bromide / 0.08 g Strontium Chloride / 34.0 mg Boric Acid / 22.0 mg Sodium Silicate / 4.0 mg Sodium Fluoride / 2.4 mg Ammonium Nitrate / 1.6 mg Disodium Phosphate / 8.0 mg Agar / 15.0 g