· 1% Methylene Blue trihydrate, demineralized water. Pharma grade ingredients: Demineralized water (EP, USP), Methylene blue (USP). Third-Party Tested.· 1 vertical drop contains 0.5 mg of Methylene Blue.· Directions: Mix 1 ml (20 drops) of the solution with 200 ml of water, or use according to your established research protocols.· Our premium dark amber glass bottle with glass dropper/pipette protects methylene blue from sunlight and oxidation, ensuring long-lasting purity and maximum effectiveness. Securely packed in a durable, heavy-duty cardboard tube – perfect for travel and on-the-go protection.· Third-Party Tested for Heavy Metal Contamination. Upon request, a heavy metal analysis will be provided. Our product meets and exceeds USP requirements. Third-Party (USP) United States Pharmacopeia verified methylene blue incl. certificate.· Our production facility is certified for GMP, ISO 22000, and ISO 22716 standards, ensuring the highest quality and compliance.· Formaldehyde free. Methylene blue does not contain formaldehyde. Formaldehyde is a different compound that is used in industry and in some biological applications, but it is not part of the chemical composition of methylene blue.· ⬇⬇⬇ Please scroll down to check our Third-Party Heavy Metal analysis and other quality certificates. ⬇⬇⬇