Your glutathione vial is not a bad batch. Glutathione dissolves at 20 to 50 mg mL. When you add 2mL of water to a 600mg vial, that is 300 mg mL. The powder physically Your glutathione vial is not a bad batch. Glutathione dissolves at 20 to 50 mg mL. When you add 2mL of water to a 600mg vial, that is 300 mg mL. The powder physically Bacteriostatic Water for Injection: Package Insert Prescribing Info What Is Bacteriostatic Water For Peptide Reconstitution? UMBRELLA Labs Glutathione 1500mg: High Purity Antioxidant Research