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

Safety Information according to GHS
Hazard Pictogram(s)
Hazard Statement(s)	H319: Causes serious eye irritation.
Precautionary Statement(s)	P305 + P351 + P338: IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing.
Signal Word	Warning
RTECS	TS7650000
Storage class	10 - 13 Other liquids and solids
WGK	WGK 1 slightly water endangering
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
Hazard Symbols	Irritant
Categories of danger	irritant
R Phrase	R 36 Irritating to eyes.

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; 3250-3750/1620-1640 cm⁻¹)	≤ 0.15
Absorbance ( 2g pressed disk, 0.5 cm layer thickness) (CH-compounds; 2750-3100 cm⁻¹)	≤ 0.004
Absorbance ( 2g pressed disk, 0.5 cm layer thickness) (other ; 420-4000 cm⁻¹)	≤ 0.015

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MERCK 104907 Potassium bromide for IR spectroscopy Uvasol

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