Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Indicators | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | C₂₀H₁₂N₃NaO₇S |
Complexometric Indicator | Metal Ion Detection Reagent | For Titration of Water Hardness
VWR Eriochrome Black T (EBT) is a widely used complexometric indicator dye ideal for determining total water hardness in EDTA titrations. It forms a red complex with divalent metal ions (e.g., Ca²⁺, Mg²⁺), which transitions to blue upon successful titration, making it a critical component in water quality analysis, especially for field and environmental testing.
Key Features
- TECHNICAL Grade – Cost-effective for routine titrations and water testing
- Sharp Color Transition – Red-to-blue shift for clear titration endpoint detection
- Reliable Performance – Widely accepted in standard hardness determination protocols
- Metal Ion Sensitive – Responsive to Ca²⁺, Mg²⁺, and other alkaline earth metals
- Easy to Handle – Stable, solid powder format
Specifications
| Property | Value |
|---|---|
| Product Name | Eriochrome Black T |
| CAS Number | 1787-61-7 |
| Chemical Formula | C₂₀H₁₂N₃NaO₇S |
| Molar Mass | 461.39 g/mol |
| Grade | Technical |
| EINECS | 217-250-3 |
| UN Number | 3077 |
| ADR Classification | Class 9, PG III |
| Hazard Symbols | GHS07, GHS09 |
| Storage Temperature | Ambient |
Applications
- Water Hardness Testing – Indicator in EDTA complexometric titrations
- Environmental Monitoring – On-site or lab analysis of water quality
- Educational Chemistry – Demonstration of metal complexation and titration
- Boiler & Cooling System Monitoring – For routine water treatment QC
- Analytical Chemistry – Complexometric indicator for divalent metal ions
Ordering Information
| Catalog Number | Pack Size | Packaging Type |
|---|---|---|
| 26002.183 | 100 g | Plastic bottle (solids) |
VWR® Eriochrome Black T, TECHNICAL, is an essential reagent for complexometric titrations, providing a sharp, reliable color change to accurately indicate metal ion concentrations in water and industrial fluid systems.
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