HEPES is a biological buffer that functions over a pH range of 6.8 to 8.2.
Formula Weight: 238.3.
Properties:
- Appearance: White, crystalline powder.
- Purity: ≥99.5%.
- Lead: ≤5ppm.
- Iron: ≤5ppm.
- Moisture: ≤0.5%.
- pH at 25°C (1M): 5.0–6.5.
- A260 at 0.1M: ≤0.05.
- A280 at 0.1M: ≤0.04.