Description
Specifications Table
| Product Name | Solochrome Dark Blue C.I. No. 15705 (Calcon, Eriochrome Blue Black R) |
|---|---|
| Pack Size | 25g |
| Form | Powder |
| Grade | Laboratory Reagent |
| Application | Water hardness testing, complexometric titrations |
Product Description
Solochrome Dark Blue, also known as Calcon or Eriochrome Blue Black R, is a widely used metallochromic indicator in analytical chemistry. This high-quality dye forms stable complexes with metal ions, making it ideal for determining water hardness through EDTA titrations. Researchers and students rely on its sharp color change from blue to pink at the endpoint, ensuring precise results in lab experiments.
Whether you’re setting up a titration experiment or verifying water quality, this indicator delivers consistent performance. Its solubility in water and alcohol allows for easy preparation of indicator solutions. For accurate measurements, always use freshly prepared solutions and store the powder in a cool, dry place to maintain stability.
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How Solochrome Dark Blue Works
The dye functions by binding to metal ions like calcium and magnesium. When EDTA is added during titration, it displaces the dye from the metal complex, causing a visible color shift. This mechanism is fundamental in complexometric titrations, where the endpoint is determined by the color change from blue (metal-dye complex) to pink (free dye).
For best results, maintain a pH of 10-11 using ammonia buffer. The indicator is particularly useful in educational labs for teaching titration techniques and in environmental testing for water hardness analysis.
Applications in Laboratories
This versatile indicator finds use in:
- Determining total hardness in water samples
- Educational demonstrations of complexometric titrations
- Quality control in industrial water treatment
- Research applications requiring metal ion detection
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Safety and Handling
While generally safe for lab use, follow standard chemical handling precautions:
- Wear gloves and eye protection when handling
- Avoid inhalation of powder
- Store in a tightly sealed container away from moisture
FAQs
What is the shelf life of Solochrome Dark Blue?
The powder remains stable for 2-3 years when stored properly in a cool, dry place away from direct sunlight.
How do I prepare the indicator solution?
Dissolve 0.1g of the dye in 20ml of ethanol, then dilute to 100ml with distilled water. Add 1-2 drops per titration.
Can this be used for both calcium and magnesium detection?
Yes, it detects both ions but requires proper pH control for accurate differentiation.
What’s the difference between Calcon and Eriochrome Blue Black R?
They are the same compound with different trade names. Calcon is commonly used in water testing kits.
Where can I buy authentic Solochrome Dark Blue online?
eqipped offers genuine CDH products with verified purity for reliable lab results.
