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8.18631

Sigma-Aldrich

Zinc bromide

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
MDL number:
MFCD00011294
UNSPSC Code:
12352302
EC Index Number:
231-718-4
NACRES:
NA.22

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

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 %

Signal Word

Danger

Hazard Statements

H302 - H314 - H317 - H411

Hazard Classifications

Acute Tox. 4 Oral - Aquatic Chronic 2 - Eye Dam. 1 - Skin Corr. 1B - Skin Sens. 1

Storage Class Code

8B - Non-combustible, corrosive hazardous materials

WGK

WGK 3

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Regulatory Listings

Regulatory Listings are mainly provided for chemical products. Only limited information can be provided here for non-chemical products. No entry means none of the components are listed. It is the user’s obligation to ensure the safe and legal use of the product.

PDSCL

Deleterious substance

Certificates of Analysis (COA)

Search for Certificates of Analysis (COA) by entering the products Lot/Batch Number. Lot and Batch Numbers can be found on a product’s label following the words ‘Lot’ or ‘Batch’.

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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)
Zinc bromide as catalyst for the stereoselective construction of quaternary carbon: improved synthesis of diastereomerically enriched spirocyclic diols
Tu Yong Qiang, et al.
Journal of the Chemical Society. Perkin Transactions 1, (22), 3791-3794 (2000)
One-pot synthesis of 4, 5-disubstituted 1, 2, 3-(NH)-triazoles by silica supported-zinc bromide in the aerobic condition
Keivanloo A, et al.
Comptes Rendus Chimie, 16(3), 239-243 (2013)
Mild oxidative bromination of alkenes and alkynes with zinc bromide and lead tetraacetate
Muathen HA
Synthetic Communications, 34(19), 3545-3552 (2004)

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