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Welcome to 61-73-4 Supply

We specialize in high-quality Methylene Blue-Based Products made with CAS 61-73-4, also known as Methylthioninium Chloride (C₁₆H₁₈ClN₃S) and its common form Methylene Blue Trihydrate. Our offerings include pure powders, aqueous solutions, and custom formulations crafted for research, educational, laboratory, and specialized technical applications. Whether you're working with the anhydrous or trihydrate form, we provide dependable materials along with all available documentation we currently possess—such as COAs, SDSs, or technical data sheets when applicable.

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LAB-GRADE
Plastic Bottle
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Plastic Dropper Bottle
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USP-GRADE
Glass Dropper Bottle
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USP-GRADE
Glass Dropper Bottle
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From $15 /Unit
LAB-GRADE
Plastic Dropper Bottle
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From $7 /Unit