Check the listing for details. True Free Silver Ions (Ag++): 10 ppm, 99.99+% Purity - 500 mL in Glass. Condition: New. Listed at 30.00 USD. True Free-Ionic Silver in Pure Water (Ag++): 10 ppm - 99.99+% purity - 500 mL (16.9 Fl Oz) in a clear glass bottle Non-toxic CAS # 14701-21-4 Volume: 500 mL, 16.9 Fl Oz 10 ppm 10 mg/L 99.99+% purity (metals assay) Color: None Ingredients: pure distilled water, 99.99+% pure Silver Ions pH: Acidic Flammability: Non-flammable Odor: None Reactivity: None Container: Clear glass bottle with black phenolic cap Shelf life: 2+ years Made in the USA Protect from freezing The shelf life of this true free ionic Silver can be several years unopened. No (0.00%) chemicals are found in this product - only 99.99+% pure Silver Ions in pure distilled water. No other ingredients - especially no preservatives or stabilizers as found in other Ionic Silver products. WARNING: Avoid contact with this product if allergic to Silver