--- product_id: 724829650 title: "Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested" price: "€ 1.81" currency: EUR in_stock: false reviews_count: 3 url: https://www.desertcart.pt/products/724829650-methylene-blue-1-usp-pharmaceutical-grade-50-ml-1-69 store_origin: PT region: Portugal --- # Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested **Price:** € 1.81 **Availability:** ❌ Out of Stock ## Quick Answers - **What is this?** Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - **How much does it cost?** € 1.81 with free shipping - **Is it available?** Currently out of stock - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/724829650-methylene-blue-1-usp-pharmaceutical-grade-50-ml-1-69) ## Best For - Customers looking for quality international products ## Why This Product - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Description ## Technical Specifications | Specification | Value | |---------------|-------| | Package Information | Bottle | | Item Form | Liquid | | Manufacturer | Biopharm Inc | | UPC | 300384510769 | | Part Number | BM8341FG | | Item Weight | 3 ounces | | Package Dimensions | 9.09 x 4.29 x 2.72 inches | | Item model number | BM8341FG | | Size | 50 mL | | Style | 1 Pack | | Included Components | Methylene Blue 50 mL | | Batteries Included? | No | | Batteries Required? | No | ## Product Details - **Item Weight:** 3 Ounces - **Product Grade:** USP - **Molecular weight:** 319 - **Molecular formula:** C16H18ClN3S - **Item Volume:** 50 Milliliters ## Images ![Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - Image 1](https://m.media-amazon.com/images/I/81k2IHdXL9L.jpg) ![Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - Image 2](https://m.media-amazon.com/images/I/61JtfMEUjVL.jpg) ![Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - Image 3](https://m.media-amazon.com/images/I/71zYr0L9yTL.jpg) ![Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - Image 4](https://m.media-amazon.com/images/I/41nUoS20tNL.jpg) ![Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - Image 5](https://m.media-amazon.com/images/I/61bDustfZqL.jpg) ## Questions & Answers **Q: Is this the same as prussian blue? is it food grade?** A: This is not Prussian blue. Despite both being able to function as potent blue dyes, methylene blue and Prussian blue are not chemically similar to each other. This methylene blue is United States Pharmacopeia (USP) grade, which is generally accepted for food, drug, and medicinal use. **Q: What is the shelf life of this?** A: This product is assigned a shelf life of two years from the date of manufacture. **Q: Can someone help me with the math? Does this mean that you only get 5/100 ml servings per bottle? If so, this is ridiculously expensive.** A: Wayne's response isn't quite right. There are 1000 drops in a 50 mL bottle. Each drop is 0.5 mg of active ingredient (or 2 drops per mg, which Wayne got correct) or a total of 500 mg of active ingredient in each 50 mL bottle. **Q: Is the certificate of analysis available by batch ?; the one on the listing does not even have a date and the web site does not show any certificates** A: There is a product number, a lot number, and an expiration date printed on the label. ## Customer Reviews ### ⭐⭐⭐⭐⭐ 頭脳明晰 *by 見***茂 on September 13, 2025* 効果がでてきました。良い商品です。これからもリピします。 ### ⭐⭐⭐⭐⭐ do this *by K***N on July 28, 2025* i mix it with vitamin C to reduce the risk of turning everything, including your tounge and teeth, blue. ### ⭐ Blue Da Ba De.... *by C***H on July 8, 2025* This was made in Hatfield, Arkansas, which in itself scared me. It didn't do anything for me. I talked to five of my doctor friends, and they all told me to stop using it. Helps my plants though. ## Frequently Bought Together - Methylene Blue, 1% USP (Pharmaceutical) Grade, 50 mL (1.69 fl oz) Glass; 3rd Party Tested - L Methyl Folate 15mg Plus Methyl B12 Cofactor – High Potency, Active 5-MTHF Form - Supports Mood, Methylation, Cognition – Bioactive Forms of Vitamin B9 & B12 (60 Capsules – 60 Servings) - BioEmblem Triple Magnesium Complex | 300mg of Magnesium Glycinate, Malate, & Citrate for Muscles, Nerves, & Energy | High Absorption | Vegan, Non-GMO | 90 Capsules --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.pt/products/724829650-methylene-blue-1-usp-pharmaceutical-grade-50-ml-1-69](https://www.desertcart.pt/products/724829650-methylene-blue-1-usp-pharmaceutical-grade-50-ml-1-69) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-10-26*