Methylene blue is a heterocyclic organic compound with a chemical structure based on methylthioninium chloride. It appears as a dark blue crystalline powder and is highly soluble in water. It has a wide range of scientific, medical, industrial, and aquatic uses due to its redox and antimicrobial properties.

🔬 Common uses of methylene blue

• 🧪 Dye and biological marker: It is used in the laboratory to stain tissues and cells under a microscope, facilitating the observation of internal structures.
• 🐠 Aquarium Treatment: Prevents or treats fungal, bacterial, or parasitic infections in ornamental fish, especially in their early stages.
• ⚗️ Redox agent in analytical chemistry: Participates in oxidation-reduction reactions, useful for laboratory tests and electrical indicators.
• 🧼 Mild biocide: It is applied to sensitive surfaces or instruments thanks to its disinfectant action without leaving any harsh residue.
• 🧬 Specialized medical use: In clinical settings, it can be used for urinary tract infections, malaria, or methemoglobinemia under medical prescription.

✅ Recommendations for safe use

• 🔒 Handling with gloves: May stain skin, mucous membranes, or clothing. Wear gloves and appropriate protection.
• ☠️ Chemical compatibility: Do not combine with other agents without prior technical knowledge.
• 🌑 Proper storage: Store in opaque, airtight containers, away from direct sunlight.

📦 Format and presentation

It is sold in various forms, such as pure powder , 1% solution , or tincture . Make sure to use products labeled for the specific purpose (laboratory, aquarium, technical, etc.).

⚠️ Important precautions

• Do not ingest or apply to mucous membranes unless clinically indicated.
• Keep out of reach of children and pets.
• Avoid use on porous fabrics or materials without prior testing.

📝 Conclusion

Methylene blue is an extremely versatile chemical. Its responsible use makes it a powerful tool for diagnosis, purification, and microbiological control in multiple sectors. The key lies in understanding its formulation, origin, and intended use.