Potassium Bromide 500gm Merck
for IR spectroscopy Uvasol®
Manufacturer: Merck
Catalog ID: 104907.0500
Stock: In Stock
Description
| Catalogue Number | 104907 |
| Replaces | PX1378 |
| Synonyms | Hydrobromic Acid Potassium Salt |
| Overview | Potassium bromide is transparent from the near UV to long wave IR wavelengths. In IR-spectroscopy, solid samples which are difficult to melt or dissolve in any suitable IR-transmitting solvent, are analyzed by grinding with Potassium bromide powder, and pressing into a disc. This procedure has a high quality demand of the used potassium bromide. Potassium bromide Uvasol® is adjusted to a mean particle size of 150 μm. This is sufficient for the preparation of perfectly good pellets without the need for further pre-treatment and the associated risk of contamination. It also retains its powdery form over a period of years if stored in an air-tight condition. Its physical suitability for pelletising is checked by a special application test and its chemical purity established by full spectrum FT-IR analysis. |
Product Information
| CAS number | 7758-02-3 |
| EC number | 231-830-3 |
| Hill Formula | BrK |
| Chemical formula | KBr |
| Molar Mass | 119.00 g/mol |
| HS Code | 2827 51 00 |
Physicochemical Information
| Boiling point | 1435 °C (1013 hPa) |
| Density | 2.75 g/cm3 (20 °C) |
| Melting Point | 730 °C |
| pH value | 5.5 - 8.5 (50 g/l, H₂O, 20 °C) |
| Vapor pressure | 1.3 hPa (795 °C) |
| Bulk density | 900 - 1000 kg/m3 |
| Solubility | 650 g/l |
Toxicological Information
| LD 50 oral | LD50 Rat > 2000 mg/kg |
Storage and Shipping Information
| Storage | Store at +5°C to +30°C. |
Specifications
| Application test | passes test |
| Absorbance(2g pressed disk, 0.5 cm layer thickness)(Water; 3775-3050/1760-1520 cm⁻¹) | ≤ 0.15 |
| Absorbance(2g pressed disk, 0.5 cm layer thickness)(CH-compounds; 3050-2750 cm⁻¹) | ≤ 0.004 |
| Absorbance(2g pressed disk, 0.5 cm layer thickness)(other ; 4000-400 cm⁻¹) | ≤ 0.020 |
| Particle Size (d10) | ≤ 100 µm |
| Particle Size (d50) | ≤ 200 µm |
| Particle Size (d90) | ≤ 500 µm |
