1.04907

Potassium bromide

for IR spectroscopy Uvasol^®

• Synonym(s): Potassium bromide, Hydrobromic Acid Potassium Salt
• Empirical Formula (Hill Notation): BrK
• CAS Number: 7758-02-3
• Molecular Weight: 119.00
• MDL number: MFCD00011358
• EC Index Number: 231-830-3

Properties

• vapor pressure: 1.3 hPa ( 795 °C)
• Quality Level: 100
• form: solid
• potency: >2000 mg/kg LD₅₀, oral (Rat)
• pH: 5.5-8.5 (20 °C, 50 g/L in H₂O)
• bp: 1435 °C/1013 hPa
• mp: 730 °C
• solubility: 650 g/L
• density: 2.75 g/cm³ at 20 °C
• bulk density: 900‑1000 kg/m³
• storage temp.: 2-30°C
• InChI: 1S/BrH.K/h1H;/q;+1/p-1
• InChI key: IOLCXVTUBQKXJR-UHFFFAOYSA-M

Description

General description

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.

Linkage

Replaces: PX1378

Analysis Note

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

Legal Information

UVASOL is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Pictograms: GHS07
• Signal Word: Warning
• Hazard Statements: H319
• Precautionary Statements: P264 - P280 - P305 + P351 + P338 - P337 + P313
• Hazard Classifications: Eye Irrit. 2
• Storage Class Code: 13 - Non Combustible Solids
• WGK: WGK 1
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable