TAYLOR .75OZ HARDNESS REAGENT
Product Overview
Standardized EDTA titrating reagent delivering precise 10 ppm per-drop calcium hardness measurements.
Formulated as a standardized EDTA solution, the Taylor R-0012-A Hardness Reagent measures calcium hardness in both plaster and vinyl pools. Packed in a 3/4 oz (22 mL) dropper bottle under SKU R-0012, this .75OZ bottle pairs with R-0010 and R-0011L to produce an endpoint shift from red to pure blue. Taylor manufactures standardized reagents to ensure consistent drop size and chemistry, eliminating the drift common in generic testing strips.
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Benefits & What Makes It Different
Standardized EDTA Formulation
Titrates calcium ions cleanly, producing an unmistakable shift from wine-red to pure blue without intermediate purple lingering.
Precision Dropper Tip
Dispenses uniform drop volumes so each drop accurately represents 10 ppm (25 mL sample) or 25 ppm (10 mL sample) of calcium hardness.
Compact .75OZ / 22 mL Size
Fits directly into molded test kit organizer trays, including the Taylor K-2005 and K-2006 complete kits.
Product Details
Ethylenediaminetetraacetic Acid Disodium Salt (EDTA) <5%
Titration reagent: 1 drop per 10 ppm CaCO3 (25 mL sample) or 1 drop per 25 ppm CaCO3 (10 mL sample)
Compatibility
- Taylor K-2005 and K-2006 Complete test kits
- Requires Taylor R-0010 Calcium Buffer and R-0011L Calcium Indicator Liquid
When To Use This
Pro Tip
If your water sample turns purple instead of red after adding indicator, dissolved copper is likely interfering with the reaction. Add 5 or 6 drops of R-0012 to the sample before adding the buffer and indicator; this complexes the metals upfront and restores the true blue endpoint.
Common Questions & Instructions
How do you know when the calcium hardness test with R-0012 is complete?
Add R-0012 drop by drop, swirling after each drop, until the solution changes completely from red to blue. Multiply the total drops by 10 (for a 25 mL sample) or by 25 (for a 10 mL sample) to calculate total calcium hardness in ppm.
What is the shelf life of the Taylor R-0012-A hardness reagent?
Taylor reagents maintain chemical stability for 12 to 24 months when stored between 36°F and 85°F away from direct sunlight. Replace the 22 mL bottle if the liquid shows discoloration or if test endpoints fail to turn fully blue.
Can I use Taylor R-0012 with reagents from other test kit brands?
Taylor R-0012 is calibrated specifically to react with Taylor R-0010 Calcium Buffer and R-0011L Calcium Indicator. Intermixing reagents across different brands distorts titration drop volume and leads to inaccurate hardness calculations.
Delivered today to your DFW neighborhood
Order this item by 2 PM Central on a weekday, and we'll have it on your driveway by evening. Same-day delivery is FREE to every ZIP in our DFW coverage area — no minimum — or it's free with our weekly service plan.
