Litmus Indicator, Pure
Catalog No: ASD-632
CAS No: 1393-92-6
Grade: Laboratory Reagent / Indicator Grade
Color Index: 1242
Alternative names: Lichen blue, Lacmus
Product Overview
Litmus (ASD-632) is a premium-quality, water-soluble mixture of natural dyes extracted from lichens. It serves as the classic acid-base indicator for educational, laboratory, and industrial applications.
This specific batch is verified for high sensitivity, offering a reliable transition range between pH 5 and pH 8. It is the ideal raw material for preparing litmus paper, general pH testing solutions, and microbiological media (such as Litmus Milk).
Key Features & Benefits
- Verified Transition Range: rigorously tested to ensure a compliant color shift from pH 5 (Red/Acidic) to pH 8 (Blue/Alkaline).
- Natural Origin: Sourced from high-quality lichens, ensuring a stable and distinct color change.
- Low Moisture Content: Verified loss on drying of less than 7%, ensuring a free-flowing powder with excellent shelf stability.
- High Solubility: Dissolves readily in water to form a clear, effective indicator solution.
Applications
🧪 Laboratory & Education
- Acid-Base Testing: The standard indicator for qualitative analysis and teaching pH concepts.
- Indicator Solutions: Used to prepare neutral litmus solution (purple) which turns red in acids and blue in alkalis.
🏭 Manufacturing
- Litmus Paper: The essential ingredient for producing Red, Blue, and Neutral pH test strips.
🔬 Microbiology
- Litmus Milk Media: Acts as both a pH and redox indicator to differentiate bacteria based on metabolic reactions (e.g., lactose fermentation).
Certificate of Analysis (CoA) Summary
Batch Specific Quality Control Data
| Sr. No. | Criteria | Specification / Limit | Test Results | Status |
|---|---|---|---|---|
| 1 | pH | 7.0 | Passes Test | ✅ Pass |
| 2 | Transition Range | pH 5 to pH 8 | Complies | ✅ Pass |
| 3 | Loss on Drying | Less than 7% at 110°C | Passes Test | ✅ Pass |
| 4 | Ash Content | 22.0% | Passes Test | ✅ Pass |
Storage & Handling
- Storage: Store in a tightly closed container in a cool, dry place. Protect from moisture and direct sunlight to prevent degradation.
- Handling: Use standard laboratory safety gear (gloves, goggles). Avoid inhalation of dust.
