--- product_id: 35717131 title: "Hach Bromthymol Blue Indicator Solution, 100 mL MDB, 25532" brand: "hach" price: "£33.39" currency: GBP in_stock: true reviews_count: 3 category: "Hach" url: https://www.desertcart.co.uk/products/35717131-hach-bromthymol-blue-indicator-solution-100-ml-mdb-25532 store_origin: GB region: United Kingdom --- # pH range 5.5-8.5 100 mL marked dropper bottle distinct color shift yellow→green→blue Hach Bromthymol Blue Indicator Solution, 100 mL MDB, 25532 **Brand:** hach **Price:** £33.39 **Availability:** ✅ In Stock ## Summary > ⚗️ Unlock the true color of your chemistry with precision and ease! ## Quick Answers - **What is this?** Hach Bromthymol Blue Indicator Solution, 100 mL MDB, 25532 by hach - **How much does it cost?** £33.39 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/35717131-hach-bromthymol-blue-indicator-solution-100-ml-mdb-25532) ## Best For - hach enthusiasts ## Why This Product - Trusted hach brand quality - Free international shipping included - Worldwide delivery with tracking - 15-day hassle-free returns ## Key Features - • **Trusted Lab Standard:** Hach’s proven formula delivers consistent, reproducible results trusted by professionals worldwide. - • **Instant Visual Feedback:** Distinct color transitions (yellow to green to blue) provide clear, immediate pH status. - • **Precision pH Monitoring:** Accurately tracks subtle pH shifts from acidic to alkaline for reliable lab results. - • **Optimized Volume & Delivery:** 100 mL bottle with built-in dropper ensures easy, mess-free dosing for hundreds of tests. - • **Versatile Application Spectrum:** Ideal for aquaculture, water treatment, pools, and industrial wastewater monitoring. ## Overview Hach Bromthymol Blue Indicator Solution is a 100 mL mid-range pH indicator that visually signals pH changes from 5.5 to 8.5 by shifting colors from yellow (acidic) through green (neutral) to blue (alkaline). Packaged in a convenient marked dropper bottle, it’s engineered for precise, easy dosing and is widely used across water treatment, aquaculture, and laboratory applications to ensure accurate pH monitoring and quality control. ## Description Hach 25532 Bromthymol Blue Indicator Solution, 100 mL MDB Review: Great pH indicator and includes eyedropper. - Using as a pH indicator for a Borates test for a pool. Great volume for my purposes as it will likely last for hundreds of tests, and the included eyedropper is a must have, so much easier to use than from other manufacturers that don't include an eyedropper. Not really sure what the other reviewer is talking about, since the concentration doesn't seem outrageously strong to me. I use .5mL in a 50mL sample that starts at a pH between 7.2-7.8. Review: Borate Test for Pool - I'm using this to run a borate test for my pool. Much more accurate that using the stupid test strips. Check Trouble Free Pool for more information. ## Features - Widely used as a mid-range pH indicator in the lab, it changes color from yellow in acidic conditions (pH less than 7) to blue in alkaline ones (pH greater than 7), making it useful for monitoring pH changes in titrations and other chemical reactions. At a pH of 7, bromothymol blue appears green. - This bromothymol blue indicator solution covers the pH range of 5.5 - 8.5 pH - Comes in a 100 mL Marked Dropping Bottle - Applications: Aquaculture, Boiler Water, Cooling Water, Groundwater, Industrial Wastewater, Influent for Wastewater, Membrane Protection, Municipal Water, Potable Water, Pre-Treatment, Primary Treatment, QA/QC Lab, Recreation/Pool, Secondary Treatment, Source Water, Steam Cycle, Tertiary Treatment, Water Conditioning, Water Cycle & Water Reuse ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B00N3ZWDWW | | Best Sellers Rank | #331,616 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #131 in Aqueous Solutions | | Date First Available | August 28, 2014 | | Item Weight | 4 ounces | | Item model number | 25532 | | Manufacturer | HACH COMPANY | | National Stock Number | 6810-00-281-4271 | | Package Dimensions | 5 x 2.8 x 1 inches | ## Images ![Hach Bromthymol Blue Indicator Solution, 100 mL MDB, 25532 - Image 1](https://m.media-amazon.com/images/I/71YWuHGM8HL.jpg) ## Questions & Answers **Q: What concentration is this solution?** A: The concentration of Hach item 25532 is proprietary information. Unfortunately we cannot release it to users. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Great pH indicator and includes eyedropper. *by L***R on May 16, 2018* Using as a pH indicator for a Borates test for a pool. Great volume for my purposes as it will likely last for hundreds of tests, and the included eyedropper is a must have, so much easier to use than from other manufacturers that don't include an eyedropper. Not really sure what the other reviewer is talking about, since the concentration doesn't seem outrageously strong to me. I use .5mL in a 50mL sample that starts at a pH between 7.2-7.8. ### ⭐⭐⭐⭐⭐ Borate Test for Pool *by D***D on June 22, 2019* I'm using this to run a borate test for my pool. Much more accurate that using the stupid test strips. Check Trouble Free Pool for more information. ### ⭐ Not for School! *by S***I on June 25, 2017* I ordered this for my science class... This is a much stronger chemical than what should be used in schools. --- ## 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.co.uk/products/35717131-hach-bromthymol-blue-indicator-solution-100-ml-mdb-25532](https://www.desertcart.co.uk/products/35717131-hach-bromthymol-blue-indicator-solution-100-ml-mdb-25532) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-16*