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Sigma-Aldrich

Chlorine

≥99.5%

Synonym(s):

Chlorine gas

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About This Item

Empirical Formula (Hill Notation):
Cl2
CAS Number:
7782-50-5
Molecular Weight:
70.91
Beilstein:
3902968
EC Number:
231-959-5
MDL number:
MFCD00010934
UNSPSC Code:
12142100
PubChem Substance ID:
24857762
NACRES:
NA.22

vapor density

2.48 (vs air)

Quality Level

100

vapor pressure

4800 mmHg ( 20 °C)

Assay

≥99.5%

form

gas (compressed)

resistivity

1E9 μΩ-cm, 20°C

pH

1.8 (20 °C, 6.4 g/L)

bp

−34 °C (lit.)

mp

−101 °C (lit.)

SMILES string

ClCl

InChI

1S/Cl2/c1-2

InChI key

KZBUYRJDOAKODT-UHFFFAOYSA-N

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Application

Chlorine gas has been used to generate chlorine atoms via photolysis for molecular halogen photochemical experiments.

It can be used:
  • As a reactant for the extraction of gold from an alluvial material via a pyrometallurgical process.
  • To synthesize carbide-derived carbons (CDC) from zirconium carbide.

Packaging

Supplied in a carbon steel lecture bottle with a CGA180M/CGA110F needle valve installed.

Compatible with the following:
  • Aldrich® lecture-bottle station systems
  • Aldrich® lecture-bottle gas regulators

Other Notes

See Technical Information Bulletin AL-151 Gas Regulators: Selection, Installation, and Operation

Legal Information

Aldrich is a registered trademark of Sigma-Aldrich Co. LLC

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regulator

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Signal Word

Danger

Hazard Classifications

Acute Tox. 2 Inhalation - Aquatic Acute 1 - Eye Irrit. 2 - Ox. Gas 1 - Press. Gas Compr. Gas - Skin Irrit. 2 - STOT SE 3

Target Organs

Respiratory system

Storage Class Code

2A - Gases

WGK

WGK 2

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Personal Protective Equipment

dust mask type N95 (US), Eyeshields, Gloves

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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Halogenation processes of secondary organic aerosol and implications on halogen release mechanisms
Ofner J, et al.
Atmospheric Chemistry and Physics, 12(13), 5787-5806 (2012)
Gold extraction by chlorination using a pyrometallurgical process
Ojeda M W, et al.
Minerals Engineering, 22(4), 409-411 (2009)
Zilong Mi et al.
Journal of environmental sciences (China), 37, 200-205 (2015-11-18)
Disinfectants are commonly applied to control the growth of microorganisms in drinking water distribution systems. However, the effect of disinfection on drinking water microbial community remains poorly understood. The present study investigated the impacts of different disinfectants (chlorine and chloramine)
Superactivated carbide-derived carbons with high hydrogen storage capacity.
Sevilla M, et al.
Energy & Environmental Science, 3(2), 223-227 (2010)
Per Bengtson et al.
Environmental microbiology, 11(6), 1330-1339 (2009-05-21)
Several studies have demonstrated that extensive formation of organically bound chlorine occurs both in soil and in decaying plant material. Previous studies suggest that enzymatic formation of reactive chlorine outside cells is a major source. However, the ecological role of
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