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8.18631

Zinc bromide

Name: Zinc bromide
Brand: MM

anhydrous for synthesis

Synonym(s):

Zinc bromide, Zinc dibromide

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About This Item

Empirical Formula (Hill Notation):

Br₂Zn

CAS Number:

7699-45-8

Molecular Weight:

225.20

UNSPSC Code:

12352302

EC Index Number:

231-718-4

NACRES:

NA.22

MDL number:

MFCD00011294

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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

SMILES string

[Zn](Br)Br

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 %

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hcodes

H302,H314,H317,H411

Storage Class

8B - Non-combustible corrosive hazardous materials

pictograms

GHS05,GHS07,GHS09

signalword

Danger

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

wgk

WGK 3

flash_point_f

Not applicable

flash_point_c

Not applicable

Certificates of Analysis (COA)

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Silica-supported zinc bromide (ZnBr2/SiO2): a highly efficient heterogeneous catalyst for coupling acid chlorides with terminal alkynes

Keivanloo A, et al.

Tetrahedron Letters, 52(13), 1498-1502 (2011)

One-pot synthesis of 4, 5-disubstituted 1, 2, 3-(NH)-triazoles by silica supported-zinc bromide in the aerobic condition