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VWR Bromophenol blue, AnalaR NORMAPUR® ACS
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Specifications:
| Application | Analytical Chemistry | ||
| Storage Temperature | Ambient | ||
| Product Type | Dye | Forms | Powder |
| Product Brand | VWR | ||
| Product Grade | Analytical grade | Formula | C₁₉H₁₀Br₄O₅S |
VWR Bromophenol Blue, AnalaR NORMAPUR® ACS is a high-purity pH indicator dye ideal for analytical, biochemical, and electrophoretic applications. This reagent conforms to ACS specifications and provides precise color transition between pH 3.0 and pH 4.6, making it suitable for monitoring acid–base titrations and as a tracking dye in electrophoresis. Manufactured to NORMAPUR® quality standards, it ensures reliability, batch consistency, and compliance with laboratory-grade purity requirements.
Synonyms
Bromphenol Blue Sultone Form, BPB, 3,3′,5,5′-Tetrabromophenolsulphonphthalein, Tetrabromophenol-sulphonephthalein
Chemical and Physical Data
| Property | Specification |
|---|---|
| CAS Number | 115-39-9 |
| Chemical Formula | C₁₉H₁₀Br₄O₅S |
| Molecular Weight | 669.97 g/mol |
| MDL Number | MFCD00005875 |
| Clarity of Solution | Passes test |
| Identification (UV/VIS) | Passes test |
| Sensitivity | Passes test |
| Visual Transition Interval (pH) | 3.0 – 4.6 |
| Loss on Drying (110 °C) | Max. 2% |
| Absorption Max. λ₁ (pH 3.0) | 434 – 439 nm |
| Absorption Max. λ₂ (pH 4.6) | 590 – 593 nm |
| Specific Absorptivity (λ₁max; 0.005 g/L; pH 3.0; dry) | 350 – 400 |
| Specific Absorptivity (λ₂max; 0.005 g/L; pH 4.6; dry) | 940 – 1050 |
Available Packaging Formats
| Part Number | Pack Type | Packaging | Quantity |
|---|---|---|---|
| 85721.050 | Glass bottle | 5 g | Certificates / SDS available |
| 85721.130 | Glass bottle | 25 g | Certificates / SDS available |
Key Features
- ACS-grade purity: Meets analytical chemistry standards.
- Wide utility: Ideal for pH indication and electrophoresis tracking.
- Defined color transition range: pH 3.0 – 4.6 with reliable absorbance peaks.
- Consistent performance: Batch-tested under UV/VIS specifications.
- Stable and reliable: Low moisture content and minimal impurities.
Applications
- Acid–base titrations and pH monitoring.
- Indicator dye in gel electrophoresis.
- Analytical chemistry and quality control testing.
- Educational and research laboratories.
VWR Bromophenol Blue, AnalaR NORMAPUR® ACS offers high precision, consistency, and purity for use as a pH indicator and tracking dye in analytical and biochemical workflows. Its well-defined transition interval and ACS-compliant quality make it a trusted choice for both academic and industrial laboratories requiring reproducible analytical results.
- Pack Size: 5g 25g