Potassium bromide , AR,99.0% , 7758-02-3

Synonym(s):
Hydrobromic Acid Potassium Salt;Potassium bromide;Potassium bromide solution

CAS NO.：7758-02-3

Empirical Formula: BrK

Molecular Weight: 119

MDL number: MFCD00011358

EINECS: 231-830-3

PRODUCT Properties

• Melting point: 734 °C (lit.)
• Boiling point: 1435 °C/1 atm (lit.)
• 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
• Flash point: 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)
• Sensitive: Hygroscopic
• λmax: λ: 260 nm Amax: 0.01; λ: 280 nm Amax: 0.01
• Merck: 14,7618
• Dielectric constant: 4.8700000000000001
• Stability: Stable. Incompatible with strong oxidizing agents, strong acids, bromine trifluoride and bromine trichloride.
• InChIKey: IOLCXVTUBQKXJR-UHFFFAOYSA-M
• LogP: 1 at 25℃

Description and Uses

Potassium bromide was used as a secondary halide in combination with an iodide in the paper negative processes, the albumen on glass process, and the wet collodion processes. When silver bromide gelatin emulsion was invented, potassium bromide was the primary halide. It was also used in combination with either bichloride of mercury, copper sulfate, or potassium ferricyanide in photographic bleaches and as a restrainer in alkaline developers used for gelatin plates and developing-out papers.

Safety

• Symbol(GHS): GHS07
• Signal word: Warning
• Hazard statements: H319
• Precautionary statements: P280-P305+P351+P338-P337+P313
• 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: Yes
• HS Code: 28275100
• Toxicity: LD50 orally in Rabbit: > 2000 mg/kg