8.18631

Zinc bromide

anhydrous for synthesis

• Synonym(s): Zinc bromide, Zinc dibromide
• Empirical Formula (Hill Notation): Br₂Zn
• CAS Number: 7699-45-8
• Molecular Weight: 225.20
• MDL number: MFCD00011294
• UNSPSC Code: 12352302
• EC Index Number: 231-718-4
• NACRES: NA.22

Properties

• Quality Level: 200
• form: crystals
• pH: 4 (20 °C in H₂O, saturated solution)
• bp: 697 °C/1013 mbar
• mp: 394 °C
• solubility: 4470 g/L
• density: 4.2 g/cm³ at 20 °C
• storage temp.: 2-30°C
• InChI: 1S/2BrH.Zn/h2*1H;/q;;+2/p-2
• InChI key: VNDYJBBGRKZCSX-UHFFFAOYSA-L

Description

Application

Zinc bromide can be used as:

• A catalyst to synthesize β-hydroxy ketones by stereoselective semipinacol rearrangement of α-hydroxy epoxides.
• A safe brominating source for the oxidative bromination of alkenes and alkynes in combination with lead tetraacetate.

It can also be used to prepare silica-supported zinc bromide (ZnBr₂/SiO₂) composite, which is used as a catalyst to synthesize:

• Ynone derivatives via cross-coupling reaction of acid chlorides with terminal alkynes.
• 4,5-disubstituted-1,2,3-(NH)-triazole derivatives by one-pot cross-coupling and 1,3-dipolar cycloaddition reaction of acid chlorides, terminal alkynes, and sodium azide.

Analysis Note

Assay (argentometric): ≥ 98.0 %
Water (K. F.): ≤ 2.0 %

Safety Information

• pictograms: GHS05,GHS07,GHS09
• signalword: Danger
• hcodes: H302 - H314 - H317 - H411
• pcodes: P260 - P273 - P280 - P301 + P312 - P303 + P361 + P353 - P305 + P351 + P338
• Hazard Classifications: Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1
• Storage Class: 8B - Non-combustible, corrosive hazardous materials
• wgk_germany: WGK 3
• flash_point_f: Not applicable
• flash_point_c: Not applicable