Ammonia solution 25% for analysis (EMSURE® ACS, ISO, Reag. Ph Eur) is a high-purity aqueous reagent used for pH adjustment, precipitation of metal hydroxides, and as a versatile alkaline cleaning and etching agent in analytical laboratories.
Ammonia solution (Aqueous Ammonia, Ammonium Hydroxide) is a clear, colorless liquid with a characteristic pungent odor. This EMSURE® grade product is a "multi-standard" reagent, meticulously tested to comply with the American Chemical Society (ACS), ISO standards, and the European Pharmacopoeia (Reag. Ph Eur). With a concentration of approximately 25%, it is widely used in inorganic qualitative and quantitative analysis. It serves as a complexing agent in the determination of various metal ions and is critical for the preparation of buffer solutions and the neutralization of acidic reaction mixtures.
Advantages
- Multicompliance with ACS, ISO, and Ph Eur standards for global laboratory consistency.
- High purity with extremely low levels of trace impurities (heavy metals, silicates, and carbonates).
- Part of the EMSURE® line, offering comprehensive documentation for audit-ready laboratory operations.
- Reliable 25% concentration (approx. 13.3 mol/L) for precise volumetric preparations.
- Excellent performance in cleaning laboratory glassware and as a degreasing agent.
Technical specifications
| Catalogue number | 105432 |
| Product name | Ammonia solution 25% for analysis EMSURE® |
| CAS Number | 1336-21-6 |
| Molecular Formula | NH3 · H2O |
| Molecular Weight | 35.05 g/mol |
| Assay (acidimetric) | 24.0 – 26.0 % |
| Density | 0.903 g/cm³ (20 °C) |
| pH Value | > 12 (H2O, 20 °C) |
| Storage Temperature | Room temperature (15–25 °C) |
| Brand | Merck |
