Description
Specifications Table
Product Name – BROMOCRESOL PURPLE SODIUM SALT 90% Molecular biology
Quantity/Pack Size – 10 g
Form – Powder
Grade – Molecular Biology
Application – pH indicator (5.2–6.8 range)
Product Overview
Bromocresol Purple Sodium Salt is a high-purity (90%) synthetic dye widely used as a pH indicator in laboratory settings. This molecular biology-grade compound exhibits a distinct color transition from yellow to purple across the pH range of 5.2 to 6.8, making it ideal for titrations, microbial culture media, and biochemical assays requiring precise pH monitoring. The sodium salt form enhances solubility in aqueous solutions, ensuring uniform dispersion and accurate readings. Its stability under standard lab conditions and resistance to common interferents like proteins or salts make it a reliable choice for critical applications. The powdered form allows for flexible dosing, while the molecular biology grade certification guarantees minimal impurities, reducing the risk of contamination in sensitive experiments. Whether used in solution preparation or as a direct additive, this indicator delivers consistent performance for researchers demanding reproducibility.
FAQs
1. What is the exact pH range where Bromocresol Purple Sodium Salt changes color?
The color transition occurs between pH 5.2 (yellow) and pH 6.8 (purple), with a noticeable intermediate green hue around pH 6.0.
2. Can this indicator be used in non-aqueous solvents?
It is primarily designed for aqueous systems. Solubility and color response may vary significantly in organic solvents like ethanol or acetone.
3. How should unused powder be stored to maintain stability?
Store in a tightly sealed container at room temperature, protected from light and moisture. Avoid exposure to acidic or alkaline vapors.
4. Is this product compatible with automated pH meters?
Yes, but calibration with standard buffers is recommended, as the dye’s absorbance spectrum may differ slightly from electronic sensor responses.
5. What alternatives exist for pH ranges outside 5.2–6.8?
For lower pH, Bromophenol Blue (3.0–4.6) or Methyl Orange (3.1–4.4) are options. For higher pH, Phenol Red (6.8–8.4) or Thymol Blue (8.0–9.6) can be used.
