100-Pack Red & Blue Litmus pH Test Strips – Water, Soil & Lab
100-Pack Red & Blue Litmus pH Test Strips – Water, Soil & Lab
100-Pack Red & Blue Litmus pH Test Strips
Quickly and accurately determine whether a liquid or substance is acidic or alkaline with these easy-to-use litmus pH test strips. Each box includes 100 strips — a mix of red and blue litmus paper — giving you everything you need for testing water quality, soil conditions, cosmetics, fruit juices, laundry detergent, wine, beer, and much more. Made in Mainland China.
How They Work
- Red litmus paper turns blue when it contacts an alkaline solution (pH > 8)
- Blue litmus paper turns red when it contacts an acidic solution (pH < 4.5)
- When pH is between 4.5 and 8.0, neither strip changes colour, indicating a near-neutral solution
Key Features
- ✅ Simple to use — just dip the strip into the liquid and read the result instantly; no complicated steps or equipment needed
- ✅ Reliable accuracy — provides clear, easy-to-read colour changes for confident readings
- ✅ Portable & lightweight — compact box (approx. 6.6 × 3 × 1.5 cm / 2.6 × 1.18 × 0.59 in) fits in a pocket, lab coat, or backpack
- ✅ Excellent value — 100 strips per box at an affordable price, ideal for students, hobbyists, and professionals alike
- ✅ Wide range of applications — suitable for water, soil, cosmetics, fruit, wine, beer, soapy water, and laboratory use
Specifications
- Material: Paper
- Box Size: approx. 6.6 × 3 × 1.5 cm / 2.6 × 1.18 × 0.59 in
- Strip Size: 6 × 0.9 cm / 2.36 × 0.35 in
- Quantity: 100 strips per box (red & blue)
- Origin: Made in Mainland China
Common Uses
These litmus test strips are perfect for:
- 🌱 Garden & soil pH testing
- 💧 Drinking water & aquarium water quality checks
- 🍋 Food & beverage pH checks (fruit, wine, beer, vinegar)
- 🧴 Cosmetics & personal care product testing
- 🧪 School, university, and home laboratory experiments
- 🧺 Laundry detergent and cleaning solution checks
Looking for more garden or lab essentials? Check out our 100 PCS Plant Support Clips for Orchid, Flower & Vine Stems or the 2.8L Beverage Dispenser with Spigot — great companions for anyone interested in water quality and home drinks.
Note: Colour results may vary slightly depending on screen/monitor settings. Minor size variations due to manual measurement are within normal tolerance.
Learn more: OSHA on eye and face protection
Frequently Asked Questions
Q: What is the difference between red and blue litmus paper strips?
A: Red litmus paper is used to detect alkaline (basic) substances — it turns blue when the pH is above 8. Blue litmus paper is used to detect acidic substances — it turns red when the pH is below 4.5. Together, the two types of litmus strips in this 100-pack cover a wide range of pH testing scenarios for water, soil, food, and laboratory use.
Q: Can these pH test strips be used for soil and water testing?
A: Yes! These litmus pH test strips are suitable for testing both liquids and certain gaseous substances. Common uses include testing garden soil (dissolve soil in water first), tap water, aquarium water, fruit juices, cosmetics, and laundry detergents — making them a versatile choice for home, garden, and lab environments.
Q: How do I use the litmus pH test strips correctly?
A: Simply remove a strip from the box and immerse it briefly into the liquid you want to test. Observe the colour change immediately — red turning blue indicates alkaline conditions (pH > 8), and blue turning red indicates acidic conditions (pH < 4.5). No colour change means the pH is roughly neutral (between 4.5 and 8.0). The process is quick, easy, and requires no additional equipment.
Q: How many strips are included in one box?
A: Each box contains 100 litmus test strips — a combination of red and blue litmus paper strips — providing excellent value for students, educators, gardeners, hobbyists, and laboratory professionals.