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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.

Physicochemical Information
Boiling point	1435 °C (1013 hPa)
Density	2.750 g/cm3
Melting Point	734 °C
pH value	5.0 – 6 (119 g/l, H₂O, 25 °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

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H319: Causes serious eye irritation.
Precautionary Statement(s)	P264: Wash skin thoroughly after handling. P280: Wear eye protection/ face protection. P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. P337 + P313: If eye irritation persists: Get medical advice/ attention.
Signal Word	Warning
RTECS	TS7650000
Storage class	10 – 13 Other liquids and solids
WGK	WGK 1 slightly hazardous to water
Disposal	14 Inorganic salts: Container I. Neutral solutions of the these salts: Container D. Before placing in Container D, check the pH with pH-Universal indicator strips (Item No. 109535).

Safety Information
Categories of danger	irritant

Storage and Shipping Information
Storage	Store at +2°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)	≤ 150 µm
Particle Size (d50)	≤ 250 µm
Particle Size (d90)	≤ 500 µm

Merck 104907 0500 Potassium Bromide Ir For Spectroscopy Uvasol 500 GR.