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Dichloroxid

Chlorine monoxide

HCID 24646
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Grundinformationen

CAS
7791-21-1
Standard-SMILES
ClOCl
InChIKey
RCJVRSBWZCNNQT-UHFFFAOYSA-N
Summenformel
Cl2O
Durchschnittliche Molmasse
86,9 g/mol
Monoisotopische Masse
85,93261998

Überblick

Chlorine monoxide is a red-yellow gas. Very reactive and unstable. Unusually stored as hydrate in frozen form. Used as a wood bleach, biocide and swimming pool treatment.

Namen und Bezeichner

Bevorzugter Name
Chlorine monoxide
IUPAC
chloro hypochlorite
Lokaler Name
Dichloroxid
Englischer Name
dichlorine oxide
Summenformel
Cl2O
Molmasse
86.91

Namen und Synonyme

Chlorine monoxideDichlorine monoxideDichlorine oxideOxygen dichloride7791-21-1CHLORINE OXIDE (CL2O)DichloroxideHypochlorous anhydrideDichloromonoxide0EQ5I4TK19EINECS 232-243-5CHLORINE MONOXIDE [MI]
Weitere Namen anzeigen
ChloroxyduldichloridooxygenChlorine monoxide.Dichlorine monooxide
HSDB 8498DTXSID50893909RefChem:575651DTXCID601323946chloro hypochloriteCl2Ooxychlorideoxy chloride

Datenbank-Bezeichner

CAS
7791-21-1
PubChem CID
24646
DTXSID
DTXSID50893909
ChEBI
CHEBI:30198
UNII
0EQ5I4TK19
EC Number
232-243-5
Nikkaji
J95.209E

Eigenschaften

Berechnete Struktureigenschaften

XLogP
1,6
Polarare Oberfläche (TPSA)
9,2 Ų
H-Brücken-Donoren
0
H-Brücken-Akzeptoren
1
Frei drehbare Bindungen
0
Schwere Atome
3
Formalladung
0
Komplexität
2,8

Experimentelle und physikochemische Eigenschaften

Chemical ClassesFlammable agents - 4th degree
SpringerMaterials PropertiesSchoenflies notation
Odor · 2 Einträge

Disagreeable, penetrating odor

Strong, unpleasant odor

Density3.552 g/L
Color/Form · 3 Einträge

Reddish-brown liquid

Yellowish-brown gas

Red-yellow gas

Solubility · 2 Einträge

Very soluble in water

Soluble in carbon tetrachloride

Boiling Point2.2 °C
DecompositionDecomposes at moderate rate at room temperature. ... Suffers photochemical and thermal decomposition: at 100-140 °C there is an induction period, followed by a second order reaction ... .
Melting Point-120.6 °C

Sicherheit und Regulatorisches

Sicherheitsangaben dienen nur zur Orientierung und ersetzen weder das Sicherheitsdatenblatt (SDB) des Lieferanten noch geltende Vorschriften oder eine fachliche Bewertung.

GHS-Klassifizierung

GHS Classification · 4 Einträge

Danger

H290 (100%): May be corrosive to metals [Warning Corrosive to Metals]

P234, P260, P264, P264+P265, P273, P280, P301+P330+P331, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P321, P363, P390, P391, P405, P406, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 37 reports by companies from 1 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Gefahrenhinweise

Regulatory InformationThe New Jersey Worker and Community Right to Know Act requires public and private employers to provide information about hazardous substances at their workplaces. (N.J.S.A. 34:5A-1 et. seq.)
Reactive GroupOxidizing Agents, Strong
Reactivity AlertsExplosive
Reactivity Profile · 1 Eintrag

Explodes when heated or by reaction with organic materials, including: carbon, carbon disulfide, ethers, hydrocarbons, dicyanogen, any readily oxidizable materials (ammonia, potassium, arsenic, antimony, sulfur, mercury sulfide, calcium phosphide, phosphine, phosphorus, hydrogen sulfide, antimony sulfide, barium sulfide, mercury sulfide, and tin sulfide). Dissolves in alkalis, forming a mixture of chlorite and chlorate. Concentration of gas should be limited to less than 10% to reduce explosion hazard. Alcohols are oxidized explosively.

Flammable LimitsLower 23.6 % by vol.; Upper 100% by vol.
Air and Water ReactionsDecomposes in water forming chlorine and oxygen gases.

Chemie und Industrie

Verwendung und Herstellung

Uses · 2 Einträge

Dichlorine monoxide has been used as an intermediate in the manufacture of calcium hypochlorite and in sterilization for space applications. Its use in the preparation of chlorinated solvents and chloroisocyanurates has been described. Dichlorine monoxide has been shown to be effective in bleaching of pulp (qv) and textiles. It also can be used as an etchant in semiconductor manufacture.

Chlorinating agent.

Methods of Manufacturing · 5 Einträge

Routes more amenable to commercial-scale production are based on reaction of chlorine with sodium bicarbonate, carbonate, or sesquicarbonate. For example, reaction of Cl2 and water vapor with soda ash in a countercurrent tower reactor gives Cl2O mixed with Cl2, HOCl, H2O, and CO2. The reaction can also be carried out in a fluidized-bed reactor employing sodium sesquicarbonate. High yields of Cl2O are reported for the reaction of Cl2, diluted with moist air, with porous soda ash. A continuous scheme for generating Cl2O involves reaction of Cl2 with anhydrous soda ash in a fixed or fluidized-bed reactor at 180 °C. The Cl2O can be used as is or absorbed in water to produce a hypochlorous acid solution. The Cl2O-containing gas from reaction of atomized NaOH can be dried, condensed, and fractionated to obtain liquid Cl2O.

Gaseous dichlorine monoxide is conveniently generated by passing chlorine gas through mercuric oxide in a packed tubular reactor. High yields are favored by cooling the reactor, diluting the chlorine with an inert gas, and mixing the dry HgO with an inert material, eg, sand. Use of excess HgO ensures complete conversion of chlorine. The spent HgO can be regenerated by treatment with aqueous caustic, filtering, washing with water, and drying at 110 °C. The relatively pure Cl2O in the exit gases can be passed through a trap cooled with dry ice and acetone to condense liquid Cl2O. The preparation can also be carried out under static conditions.

Dichlorine monoxide is formed by passing chlorine diluted with an inert gas over the surface of a slowly stirred 50% NaOH solution at about 5 °C. The exit gas also contains some unreacted chlorine as well as HOCl and small amounts of water vapor. Passage through P2O5 absorbs the moisture and dehydrates the HOCl to Cl2O. Condensation of the Cl2O separates it from the inert gas and most of the chlorine. Fractionation removes the last traces of chlorine.

First preparation by J.L. Gay-Lussac in 1842 from yellow mercuric oxide and chlorine.

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HRID 88435als EduktTraining data from https://doi.org/10.1039/C8SC04228D (2/10)
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HRID 155727als EduktTraining data from https://doi.org/10.1039/C8SC04228D (9/10)
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Heat of Vaporization
26.3 kJ/mol
Henry's Law ConstantHenry's Law constant = 14.23 kPa/mol
Physical DescriptionChlorine monoxide is a red-yellow gas. Very reactive and unstable. Unusually stored as hydrate in frozen form. Used as a wood bleach, biocide and swimming pool treatment.

Physikochemische Eigenschaften

Schmelzpunkt
-120.6 ° · -120.6°
Siedepunkt
2.2 ° · bp 2.2°
Dichte
1.549 · 1.549 (estimate)
Löslichkeit
2 O · very soluble in H2O
Aggregatzustand
yellow-brown gas
Farbe
yellow-brown
Wasserlöslichkeit
1 volume · 1 volume of water dissolves more than 100 volumes (0°C); saturation solubility is 143.6g/100g H2O (9.4°C) [MER06] [KIR78]
Spezifische Wärmekapazität
0.52 J/ · Cp(gas): 0.52 J/(g·K), at 25℃
Henry's Law Constant
3.4 · 3.4×10-2 mol/(m3Pa) at 25℃, ref: this
EPA chemische Informationen
Chlorine monoxide (7791-21-1)
NFPA Hazard Classification · 3 Einträge

3 - Materials that, under emergency conditions, can cause serious or permanent injury.

4 - Materials that rapidly or completely vaporize at atmospheric pressure and normal ambient temperature or that are readily dispersed in air and burn readily.

3 - Materials that in themselves are capable of detonation or explosive decomposition or explosive reaction but that require a strong initiating source or must be heated under confinement before initiation.

Hazard Classes and Categories · 2 Einträge

Met. Corr. 1 (100%)

Flammable agents - 4th degree, Reactive agents - 3rd degree

DHS Chemicals of Interest (COI) · 4 Einträge

Chlorine monoxide

1

10000

Flammable chemical that can be released at a facility.

Explosive Limits and Potential · 2 Einträge

Self-explodes.

The liquid at 2 °C is spark- and touch-sensitive. The gas may explode when heated above 42 °C.

Skin, Eye, and Respiratory Irritations · 2 Einträge

Intensely irritating to eyes, skin, mucous membranes, respiratory tract.

Strong irritant to eyes, skin, and mucous membranes.

Hazardous Reactivities and Incompatibilities · 5 Einträge

Explodes on contact with organic materials.

Can ... be caused to explode by a spark or by heating.

Incompatible with carbon, dicyanogen, diphenylmercury, nitrogen oxide, oxidizable materials, and potassium.

Explodes on contact with alcohols, ammonia, antimony, antimony sulfide, arsenic, barium sulfide, calcium phosphide, carbon, carbon disulfide vapor, charcoal, cork, dicyanogen ethers, hydrogen sulfide, mercury sulfide, nitrogen oxide, paper, phosphine, phosphorus, potassium, rubber, sulfur, tin sulfide, turpentine, and other oxidizable materials.

For more Hazardous Reactivities and Incompatibilities (Complete) data for Chlorine monoxide (15 total), please visit the HSDB record page.

Sicherheit und Schutzausrüstung

Fire Fighting ProceduresStop flow of gas.
Storage ConditionsStored as a liquid or solid at temperatures below -80 °C.
Disposal Methods · 1 Eintrag

SRP: Recycle any unused portion of the material for its approved use or return it to the manufacturer or supplier. Ultimate disposal of the chemical must consider: the material's impact on air quality; potential migration in air, soil or water; effects on animal, aquatic and plant life; and conformance with environmental and public health regulations. If it is possible or reasonable use an alternative chemical product with less inherent propensity for occupational harm/injury/toxicity or environmental contamination.

Preventive Measures · 1 Eintrag

SRP: The scientific literature for the use of contact lenses by industrial workers is inconsistent. The benefits or detrimental effects of wearing contact lenses depend not only upon the substance, but also on factors including the form of the substance, characteristics and duration of the exposure, the uses of other eye protection equipment, and the hygiene of the lenses. However, there may be individual substances whose irritating or corrosive properties are such that the wearing of contact lenses would be harmful to the eye. In those specific cases, contact lenses should not be worn. In any event, the usual eye protection equipment should be worn even when contact lenses are in place.

Toxikologische Informationen

Toxicity Summary · 1 Eintrag

IDENTIFICATION AND USE: Chlorine monoxide is a reddish-brown explosive liquid or yellowish-brown explosive gas. HUMAN STUDIES: Chlorine monoxide is intensely irritating to eyes, skin, mucous membranes, respiratory tract. ANIMAL STUDIES: There are no data available.

Human Toxicity Excerpts/SIGNS AND SYMPTOMS/ Intensely irritating to eyes, skin, mucous membranes, respiratory tract.
Artificial Pollution Sources · 1 Eintrag

Chlorine monoxide's use as a chlorinating agent(1) may result in its release to the environment through various waste streams(SRC). It's use as a wood bleach, biocide and in swimming pool treatment(2) will result in its direct release to the environment(SRC).

Antidote and Emergency Treatment · 5 Einträge

/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR if necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. Obtain medical attention. /Poisons A and B/

/SRP:/ Basic treatment: Establish a patent airway (oropharyngeal or nasopharyngeal airway, if needed). Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if needed. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for pulmonary edema and treat if necessary ... . Monitor for shock and treat if necessary ... . Anticipate seizures and treat if necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with 0.9% saline (NS) during transport ... . Do not use emetics. For ingestion, rinse mouth and administer 5 mL/kg up to 200 mL of water for dilution if the patient can swallow, has a strong gag reflex, and does not drool ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poisons A and B/

/SRP:/ Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in severe respiratory distress. Positive-pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Consider administering a beta agonist such as albuterol for severe bronchospasm ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start IV administration of D5W TKO /SRP: "To keep open", minimal flow rate/. Use 0.9% saline (NS) or lactated Ringer's (LR) if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) or lorazepam (Ativan) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poisons A and B/

/SRP:/ Immediate first aid: Ensure that adequate decontamination has been carried out. If patient is not breathing, start artificial respiration, preferably with a demand-valve resuscitator, bag-valve-mask device, or pocket mask, as trained. Perform CPR as necessary. Immediately flush contaminated eyes with gently flowing water. Do not induce vomiting. If vomiting occurs, lean patient forward or place on left side (head-down position, if possible) to maintain an open airway and prevent aspiration. Keep patient quiet and maintain normal body temperature. obtain attention. /Explosives/

For more Antidote and Emergency Treatment (Complete) data for Chlorine monoxide (6 total), please visit the HSDB record page.

Regulatorische Informationen

DHS Chemicals of Interest (COI) · 4 Einträge

Chlorine monoxide

1

10000

Flammable chemical that can be released at a facility.

Sicherheitsdaten

tsca
TSCA listed
Giftige Stoffe Daten
7791-21-1(Hazardous Substances Data)

Derivation: Reaction of mercuric oxide and chlorine.

General Manufacturing InformationChlorine oxide (Cl2O): ACTIVE

Anwendungen

VerwendenDichlorine oxide is a chlorinating agent.

Darstellung

synthetischeChlorine monoxide is prepared by passing chlorine gas over yellow mercuric oxide. It is stored below -80°C as a liquid or solid.

Ergänzende Hinweise

DefinitionAn orange gas made by passing chlorine over mercury(II) oxide. It is a strong oxidizing agent and dissolves in water to give chloric( I) acid.