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Substance Name: Chlorine
RN: 7782-50-5
UNII: 4R7X1O2820
InChIKey: KZBUYRJDOAKODT-UHFFFAOYSA-N

Note

  • A greenish-yellow, diatomic gas that is a member of the halogen family of elements. It has the atomic symbol Cl, atomic number 17, and atomic weight 35. It is a powerful irritant that can cause fatal pulmonary edema. Chlorine is used in manufacturing, as a reagent in synthetic chemistry, for water purification, and in the production of chlorinated lime, which is used in fabric bleaching.

Molecular Formula

  • Cl2

Molecular Weight

  • 70.906
 

Classification Codes

Classification Codes

  • Chemical Warfare Agents
  • Human Data
  • Mutation Data
  • Noxae
  • Poisons
  • Reproductive Effect
  • Tumor Data

Superlist Classification Codes

  • 2007 CERCLA Priority List, Rank: 91
  • 2011 CERCLA Priority List, Rank: 104
  • Ceiling 1 ppm (3 mg/m3)
  • Reportable Quantity (RQ) = 10 lb
  • Threshold Planning Quantity (TPQ) = 100 lb
  • TWA (0.5 ppm); STEL (1 ppm); Not classifiable as a human carcinogen

Names and Synonyms

Name of Substance

  • Chlorine

MeSH Heading

  • Chlorine

Synonyms

  • Bertholite
  • Bertholite /warfare gas/
  • Caswell No. 179
  • CCRIS 2280
  • Chloor
  • Chloor [Dutch]
  • Chlor
  • Chlor [German]
  • Chlore
  • Chlore [French]
  • Chlorine
  • Chlorine gas
  • Chlorine mol.
  • Chlorine-elemental
  • Chlorinum
  • Cloro
  • Cloro [Italian]
  • EC 231-959-5
  • EINECS 231-959-5
  • EPA Pesticide Chemical Code 020501
  • HSDB 206
  • Molecular chlorine
  • UN 1017
  • UNII-4R7X1O2820

Systematic Name

  • Chlorine

Superlist Names

  • Chlorinated water (chlorine)
  • Chlorine
  • Chlorine [UN1017] [Poison gas]
  • UN1017

Registry Numbers

CAS Registry Number

  • 7782-50-5

FDA UNII

  • 4R7X1O2820

System Generated Number

  • 0007782505

Structure Descriptors

InChI

1S/Cl2/c1-2

InChIKey

KZBUYRJDOAKODT-UHFFFAOYSA-N

Smiles

ClCl

Toxicity

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LCLo inhalation 800ppm/30M (800ppm) BEHAVIORAL: MUSCLE WEAKNESS

GASTROINTESTINAL: NAUSEA OR VOMITING

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Journal of Pharmacology and Experimental Therapeutics. Vol. 14, Pg. 65, 1919.
guinea pig LCLo inhalation 3200ppm/3H (3200ppm)   Archiv fuer Hygiene. Vol. 7, Pg. 231, 1887.
human LCLo inhalation 500ppm/5M (500ppm)   Tabulae Biologicae. Vol. 3, Pg. 231, 1933.
human LCLo inhalation 2530mg/m3/30M (2530mg/m3) LUNGS, THORAX, OR RESPIRATION: CHRONIC PULMONARY EDEMA

LUNGS, THORAX, OR RESPIRATION: EMPHYSEMA

LUNGS, THORAX, OR RESPIRATION: STRUCTURAL OR FUNCTIONAL CHANGE IN TRACHEA OR BRONCHI
"Chemicals in War," Prentiss, A.M., New York, McGraw Hill Book Co., 1937Vol. -, Pg. 150, 1937.
human TCLo inhalation 500ppb/2D-I (0.5ppm) BEHAVIORAL: TOLERANCE Journal of Applied Physiology. Vol. 54, Pg. 1120, 1983.
human TCLo inhalation 66ppm/1H (66ppm) LUNGS, THORAX, OR RESPIRATION: COUGH

BEHAVIORAL: HEADACHE

LUNGS, THORAX, OR RESPIRATION: DYSPNEA
Diagnostic Cytopathology. Vol. 4, Pg. 28, 1988.
mammal (species unspecified) LCLo inhalation 500ppm/5M (500ppm)   Naunyn-Schmiedeberg's Archiv fuer Experimentelle Pathologie und Pharmakologie. Vol. 138, Pg. 65, 1928.
mouse LC50 inhalation 137ppm/1H (137ppm)   Aerospace Medical Research Laboratory Report. Vol. TR-72-62, Pg. 1972,
rat LC50 inhalation 293ppm/1H (293ppm)   Aerospace Medical Research Laboratory Report. Vol. TR-72-62, Pg. 1972,