Blue Litmus test paper is a foolproof pH test to determine if something is acidic. The Blue Litmus test paper does not come with a color chart as it cannot provide you with a defined pH value. The test strip will turn red if dipped into an acidic solution (pH <7). It will remain unchanged in an alkaline solution. Although there is no color chart, the strip will turn various shades of red, getting darker the more acidic the solution. We have tested the blue litmus with multiple pH buffers. The blue paper is blue at pH 8. At pH 7, the sample is maybe just a little red. The real change to red seems to start with pH 6.5 and lower.
Blue Litmus Test Paper
Blue Litmus Test Paper
- Remove one Blue Litmus test paper from the vial, being careful not to touch the strip anywhere other than where you grasp it.
- Dip the strip into the solution to be tested for 1-2 seconds and remove.
- The test strip will turn red in seconds if dipped into a solution that is acidic, and will remain unchanged if not.
NOTE: The solution must be water-based.
Disclaimer: Precision Laboratories products are not approved for use as medical devices. Products and product information is for informational purposes only and not intended for use to diagnose, treat, cure or prevent any medical condition. Consult a medical doctor when needed.
AD180; AG180; 180/500; DQ430; DR430; B515; GG515; 180; 180-12V-100; 180-25V-100; 180-144V-100; 180-500V-100; 280; 280-24-810; 280-500-810; 380; 380-1-25; 380-1V-8-25; 380-12V-8-25
Product Specs
| SKU 1: | 180-12V-100 (12 vials, 100 strips/vial) |
|---|---|
| SKU 2: | 180-25V-100 (25 vials, 100 strips/vial) |
| SKU 3: | 180-144V-100 (144 vials, 100 strips/vial) |
| SKU 4: | 180-500V-100 (500 vials, 100 strips/vial) |
| SKU 5: | 280-24-810 (24 sheets, 8" x 10" [200mm x 250mm]) |
| SKU 6: | 280-500-810 (500 sheets, 8" x 10" [200mm x 250mm]) |
| Strip Quantity: | 100 strips |
| Other: | Additional sheet sizes available upon request |
| Vial Dimensions: | .75″ (D) x 2.75″ (H) [19mm (D) x 70mm (H)] |
| Strip Dimensions: | 1.875" (L) x .25" (W) [48mm (L) x 6mm (W)] |
| Box Dimensions: | 10" x 10" x 2.75" [29.8 cm x 19 cm x 7 cm] (144-pack box), 21" x 14.75" x 3" [53.3 cm x 37.5 cm x 7.6 cm] (500-pack box), 3.25" x 2.375" x 3" [8.3 cm x 6 cm x 7.6cm] (12-pack box), 5" x 3.5" x 3" [12.7 cm x 8.9 cm x 7.6 cm] (25-pack box) |
| Weight: | 0.02 lbs [9 g] (single vial) |
| Other: | Stored in a pocket-sized, lightweight vial. |
| Shelf-Life: | 3 Years Minimum |
| Label: | Customizable Label |
Product Documentation
At what pH value does the blue litmus paper change from blue to red?
We have tested the blue litmus with multiple pH buffers. The blue paper is blue at pH 8. At pH 7, the sample is maybe just a little red. The real change to red seems to start with pH 6.5 and lower.
Does temperature affect the pH test strips?
Our pH Color charts were developed using NIST-traceable pH buffers at 25°C. Colorimetric pH test strips do not offer “temperature compensation.” Care should be used when comparing results using test strips to those obtained with a temperature compensated pH meter. It is well established that the “true pH” of a solution will be influenced by temperature. The extent of the effect is specific to the solution being tested. It is good practice to record the temperature of the solution when expressing results of pH testing. In the case of test strips, since they do not compensate for temperature, it is recommended that the sample being tested be brought to room temperature first.
Can I test the pH of my body with litmus papers?
No. Litmus papers are qualitative strips, meaning they employ a color change, not a specific color chart, to indicate whether a water sample is acidic, basic or neutral. The specific pH value is not determined.
Can I use pH test strips in non-buffered or low-buffered aqueous solutions?
Currently, our pH test strips are designed for testing buffered solutions, and the calibrations (color charts) are made on buffers against a pH-meter measurement. For non- or low-buffered solutions, these strips are not suitable. For this purpose, there are special pH test pads designed for low-ionic and low-buffered waters, such as water in aquariums or pools. Please see our Aquarium and Pool test strips.
