Potassium bromide CAS#7758-02-3

CAS Number:7758-02-3
Chemical Formula: BrK
Synonyms:

bromuredepotassium
Hydrobromic acid potassium salt
Potassium bromide (KBr)

Appearance: White Powder

MOQ (Minimum Order Quantity): 1 FCL (Full Container Load)

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Product Details

Potassium bromide CAS#7758-02-3

Potassium bromide is a white or colourless crystalline solid with a pungent strong bitter and saline taste, slightly hygroscopic and soluble in water and very slightly soluble in ethanol and ether; cubic; r.d. 2.75; m.p. 734°C; b.p. 1435°C. Potassium bromide maybe prepared by the action of bromine on hot potassium hydroxide solutionor by the action of iron(III) bromideor hydrogen bromide on potassium carbonate solution. It is used widely in the photographic industry and is also used as a sedative. Because of itsrange of transparency to infrared radiation,KBr is used both as a matrix for solid samples and as a prism materialin infrared spectroscopy.

Potassium bromide Chemical Properties

Melting point	734 °C (lit.)
Boiling point	1435 °C/1 atm (lit.)
bulk density	900-1000kg/m3
density	3.119 g/mL at 25 °C(lit.)
vapor density	7.14 (vs air)
vapor pressure	175 mm Hg ( 20 °C)
refractive index	1.559
Fp	1435°C
storage temp.	Store at +5°C to +30°C.
solubility	H2O: 1 M at 20 °C, clear, colorless
form	random crystals
Specific Gravity	2.75
color	White
PH	5.0-8.8 (25℃, 50mg/mL in H2O)
Water Solubility	650 g/L (20 ºC)
λmax	λ: 260 nm Amax: 0.01 λ: 280 nm Amax: 0.01
Sensitive	Hygroscopic
Merck	14,7618
Dielectric constant	4.8700000000000001
Stability:	Stable. Incompatible with strong oxidizing agents, strong acids, bromine trifluoride and bromine trichloride.
Cosmetics Ingredients Functions	VISCOSITY CONTROLLING
InChIKey	IOLCXVTUBQKXJR-UHFFFAOYSA-M
LogP	1 at 25℃
CAS DataBase Reference	7758-02-3(CAS DataBase Reference)
NIST Chemistry Reference	Potassium bromide(7758-02-3)
EPA Substance Registry System	Potassium bromide (7758-02-3)

Safety Information

Hazard Codes	Xi
Risk Statements	36/37/38-36
Safety Statements	26-45-61-7/9-39-36
RIDADR	UN 1744 8/PG 1
WGK Germany	2
RTECS	TS7650000
F	3-10
TSCA	TSCA listed
HS Code	28275100
Hazardous Substances Data	7758-02-3(Hazardous Substances Data)
Toxicity	LD50 orally in Rabbit: > 2000 mg/kg

Product Application of Potassium bromide CAS#7758-02-3

Potassium bromide is widely used in optics because KBr has a low refractive index and a wide spectral range into the infrared with nearly no absorption. As a result, KBr is widely used as infrared optical windows, as infrared beamsplitters, and as substrates for interferometers. Commonly KBr is used in transmission infrared spectroscopy as a media for powder samples. The KBr and powder are ground together and pressed, using a die, into a thin disc under vacuum. The disc suspends the sample without contributing to the transmitted signal. Potassium bromide has also been used in synthesis, commonly as a source of bromide ions. For example, double displacement of KBr and bismuth nitrate yielded nanosheets of bismuth oxybromide. Solutions of KBr have also been found to be useful shape-control agents or crystal-habit modifiers in formation of metal nanocrystals, including palladium nanorods and bimetallic platinum-paladium nanocrystals. KBr is a common source of bromide ions used as nucleophiles in organic chemistry.

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