Chloralhydrat

Chloral Hydrate

HCID 2707CAS 302-17-0

Grundinformationen

Standard-SMILES
OC(O)C(Cl)(Cl)Cl
InChIKey
RNFNDJAIBTYOQL-UHFFFAOYSA-N
Summenformel
C2H3Cl3O2
Durchschnittliche Molmasse
165,4 g/mol
Monoisotopische Masse
163,91986238

Überblick

Chloral Hydrate can cause cancer according to California Labor Code.

Namen und Bezeichner

Bevorzugter Name
Chloral Hydrate
IUPAC
2,2,2-trichloroethane-1,1-diol
Lokaler Name
Chloralhydrat
Englischer Name
Chloral hydrate
Summenformel
C2H3Cl3O2
Molmasse
165.4

Namen und Synonyme

chloral hydrate302-17-02,2,2-Trichloroethane-1,1-diolTrichloroacetaldehyde hydrateNoctecTosylChloral monohydrateChloralduratChloralhydratePhaldroneNycotonEscre
Weitere Namen anzeigen
TCAHSoraLTrichloroCHLORAL HYDRATE SOLUTIONTRICHLOROACETALDEHYDE MONOHYDRATEHydral
ChloradormCohidrateFelsulesKessodrateOradrateRectulesTrawotoxDormal

Datenbank-Bezeichner

CAS
302-17-0
PubChem CID
2707
DTXSID
DTXSID7020261
ChEMBL
CHEMBL455917
ChEBI
CHEBI:28142
UNII
418M5916WG
EC Number
206-117-5
Nikkaji
J1.517B

Eigenschaften

Berechnete Struktureigenschaften

XLogP
1
Polarare Oberfläche (TPSA)
40,5 Ų
H-Brücken-Donoren
2
H-Brücken-Akzeptoren
2
Frei drehbare Bindungen
0
Schwere Atome
7

Experimentelle und physikochemische Eigenschaften

Chemical Classes · 2 Einträge

Other Classes -> Halogenated Alcohols

Carcinogens

Drugs · 6 Einträge

DEA NFLIS-Drug Category -> Depressants and Tranquilizers

DEA Schedule IV Controlled Substance -> Depressants

Pharmaceuticals -> Antiepileptics

Pharmaceuticals

Pharmaceuticals -> Listed in ZINC15

Pharmaceuticals -> Used in Switzerland

pH3.5-4.4 (10% soln in water)
SpringerMaterials PropertiesMoessbauer quadrupole effect
PesticidesPesticide -> EPA IRIS
LogP · 2 Einträge

log Kow = 0.99

0.99

Physikochemische Eigenschaften

Schmelzpunkt
57 °C · 57 °C(lit.)
Siedepunkt
97 °C · 97 °C
Dichte
1.43 g/mL · 1.43 g/mL at 20 °C
Dampfdruck
19.998 hPa · 19.998hPa at 25℃
Brechungsindex
1.4603 · 1.4603 (estimate)
Flammpunkt
16 °C · 16 °C

Sicherheit und Regulatorisches

GHS-Klassifizierung

GHS Classification · 6 Einträge

Danger

H301: Toxic if swallowed [Danger Acute toxicity, oral]

P264, P264+P265, P270, P280, P301+P316, P302+P352, P305+P351+P338, P321, P330, P332+P317, P337+P317, P362+P364, P405, and P501 (click each P-code to see the statement)

Danger

H301 (99%): Toxic if swallowed [Danger Acute toxicity, oral]

P264, P264+P265, P270, P280, P301+P316, P302+P352, P305+P351+P338, P321, P330, P332+P317, P337+P317, P362+P364, P405, and P501 (click each P-code to see the statement)

Gefahrenhinweise

Regulatory Information · 6 Einträge

Chemical: 1,1-Ethanediol, 2,2,2-trichloro-

Hazard Traits - Carcinogenicity; Neurotoxicity

DEA schedule IV controlled substance

Status: Active Update: 01-03-2023 https://echa.europa.eu/registration-dossier/-/registered-dossier/17704

Chloral hydrate: Does not have an individual approval but may be used under an appropriate group standard

The 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.)

DOT LabelPoison
Fire Hazards · 2 Einträge

Flash point data for this chemical are not available; however, it is probably combustible. (NTP, 1992)

Not combustible. Gives off irritating or toxic fumes (or gases) in a fire.

Fire PotentialCombustible when exposed to heat or flame.
Health Hazards · 1 Eintrag

SYMPTOMS: Symptoms of exposure to this compound include general anesthesia, cardiac arrythmias and blood pressure depression. Other symptoms include hemorrhagic gastritis, enteritis, central nervous system depression, coma, severe respiratory depression, ventricular tachycardia and cardiac arrest. Dermatitis, swelling of the lids, hyperemia, edema of the conjuctiva and a sensation of irritation and tearing may also occur. Exposure may result in gastric irritation, rapid circulatory collapse, kidney and liver damage, heart damage, psychosis and leukopenia. Flatulence, abdominal distension, nausea, headache, giddiness, rashes and blood dyscrasias can occur.

Hazards Summary · 1 Eintrag

A skin, eye, and respiratory tract irritant; A CNS depressant; [ICSC] A skin and mucous membrane irritant; May cause eye injury; [HSDB] A skin and eye irritant; [eChemPortal: ERMA; ESIS] An irritant; [MSDSonline] Liver injury reported after lethal doses, but not after therapeutic doses; [INCHEM: CICADS]

Sicherheit und Schutzausrüstung

Fire Fighting · 2 Einträge

Fires involving this material can be controlled with a dry chemical, carbon dioxide or Halon extinguisher. (NTP, 1992)

In case of fire in the surroundings, use appropriate extinguishing media. In case of fire: keep drums, etc., cool by spraying with water.

First Aid Measures · 4 Einträge

Fresh air, rest. Artificial respiration may be needed. Refer immediately for medical attention.

Rinse skin with plenty of water or shower.

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth. Do NOT induce vomiting. Refer immediately for medical attention.

First Aid · 1 Eintrag

EYES: First check the victim for contact lenses and remove if present. Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes without specific instructions from a physician. IMMEDIATELY transport the victim after flushing eyes to a hospital even if no symptoms (such as redness or irritation) develop.

Safe StorageSeparated from strong bases and food and feedstuffs.
Storage ConditionsChloral hydrate oral solution should be stored in tight, light-resistant containers. Chloral hydrate capsules should be stored at 15-30 °C.
Nonfire Spill Response · 1 Eintrag

SMALL SPILLS AND LEAKAGE: If you spill this chemical, you should dampen the solid spill material with water, then transfer the dampened material to a suitable container. Use absorbent paper dampened with water to pick up any remaining material. Seal your contaminated clothing and the absorbent paper in a vapor-tight plastic bag for eventual disposal. Wash all contaminated surfaces with a soap and water solution. Do not reenter the contaminated area until the Safety Officer (or other responsible person) has verified that the area has been properly cleaned.

Toxikologische Informationen

Body Burden · 2 Einträge

Chloral hydrate has been detected in /human/ ... milk ... .

Chloral hydrate and its metabolite, trichloroethanol reached 50-100% /in breast milk/ of maternal blood levels in most of 50 women given 1.3 g rectally.

Interactions · 5 Einträge

Prolonged concurrent use /with other addictive medications especially CNS depressants with habituating potential/ may increase the risk of habituation; caution is recommended.

Concurrent use /with alcohol or other CNS depression-producing medications/ may increase the CNS depressant effect of either these medications or chloral hydrate; caution is recommended and dosage of one or both agents should be reduced.

Hypoprothrombinemic effects may be increased when these medications /coumarin- or indandione-derivative anticoagulants/ are used concurrently with chloral hydrate, particularly during the first 2 weeks of concurrent therapy, because of displacement of the anticoagulant from its plasma protein binding sites; with continued concurrent use, anticoagulant activity may return to baseline level or be decreased; frequent prothrombin-time determinations may be required, especially during initiation of chloral hydrate therapy, to determine if dosage adjustment of the anticoagulant is necessary.

Administration of chloral hydrate followed by intravenous furosemide within 24 hours may result in diaphoresis, hot flashes, and variable blood pressure, including hypertension, due to a hypermetabolic state caused by displacement of thyroxine from its bound state.

For more Interactions (Complete) data for CHLORAL HYDRATE (13 total), please visit the HSDB record page.

Target OrgansGastrointestinal
Hepatotoxicity · 1 Eintrag

Chloral hydrate has been in clinical use for many decades and has not been linked to serum enzyme elevations during therapy or instances of clinically apparent liver injury. While prospective studies of the effects of chloral hydrate on liver tests have not been done, the absence of reported instances of liver injury attributable to chloral hydrate suggests that it has little or no hepatic toxicity. Chloral hydrate has been linked to hypersensitivity reactions such as rash, fever and eosinophilia. Chloral hydrate also has major drug-drug interactions with oral anticoagulants, antidepressants and alcohol. In patients with cirrhosis and hepatic decompensation, chloral hydrate can trigger or worsen hepatic encephalopathy.

Ecotoxicity Values · 4 Einträge

EC50; Species: Daphnia magna (Water flea); Conditions: freshwater; pH 8; Concentration: 630 mg/L for 24 hr; Effect: behavior, equilibrium /Conditions of bioassay not specified in source examined/

EC50; Species: Daphnia magna (Water flea); Conditions: freshwater; Concentration: 500 mg/L for 48 hr; Effect: intoxication, immobilization /Conditions of bioassay not specified in source examined/

LC50; Species: Daphnia magna (Water flea, age < or =24 hr); Conditions: freshwater; static, 20-22 °C, pH 7.6-7.7; Concentration: 510 mg/L for 24 hr

LC50; Species: Leuciscus idus melanotus (Carp); Conditions: freshwater; Concentration: 1720 mg/L for 48 hr /Conditions of bioassay not specified in source examined/

Environmental Fate · 3 Einträge

TERRESTRIAL FATE: Based on a classification scheme(1), an estimated Koc value of 82(SRC), determined from a log Kow of 0.99(2) and a regression-derived equation(3), indicates that chloral hydrate is expected to have high mobility in soil(SRC). Volatilization of chloral hydrate from moist soil surfaces is expected to be an important fate process(SRC) given an estimated Henry's Law constant of 5.7X10-9 atm-cu m/mole(SRC) derived from its vapor pressure, 15 mm Hg(4), and water solubility, 7.93X10+5 mg/L(5). Chloral hydrate is expected to volatilize from dry soil surfaces(SRC) based upon its vapor pressure(4). Biodegradation data for chloral hydrate were not available(5).

AQUATIC FATE: Based on a classification scheme(1), an estimated Koc value of 82(SRC), determined from a log Kow of 0.99(2) and a regression-derived equation(3), indicates that chloral hydrate is not expected to adsorb to suspended solids and sediment(SRC). Volatilization from water surfaces is expected(3) based upon an estimated Henry's Law constant of 4.1X10-9 atm-cu m/mole(SRC), derived from its vapor pressure, 15 mm Hg(4), and water solubility, 7.93X10+5 mg/L(5). Using this Henry's Law constant and an estimation method(3), volatilization half-lives for a model river and model lake are 12 days and 88 days, respectively(SRC). According to a classification scheme(6), an estimated BCF of 3(SRC), from its log Kow(2) and a regression-derived equation(7), suggests the potential for bioconcentration in aquatic organisms is low(SRC). Biodegradation data for chloral hydrate were not available(8).

ATMOSPHERIC FATE: According to a model of gas/particle partitioning of semivolatile organic compounds in the atmosphere(1), chloral hydrate, which has a vapor pressure of 15 mm Hg at 25 deg(2), is expected to exist solely as a vapor in the ambient atmosphere. Vapor-phase chloral hydrate is degraded in the atmosphere by reaction with photochemically-produced hydroxyl radicals(SRC); the half-life for this reaction in air is estimated to be 8 days(SRC), calculated from its rate constant of 1.9X10-12 cu cm/molecule-sec at 25 °C(SRC) that was derived using a structure estimation method(3). The related aldehyde chloral is readily photolyzed in sunlight based on an atmospheric half-life of 4.5-6 hours for this compound under conditions representing the solar flux during summer months(4).

Regulatorische Informationen

FDA Requirements · 5 Einträge

Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: chloral hydrate is included in external analgesic drug products - analgesic and anesthetic drug products.

Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: chloral hydrate is included in external analgesic drug products - counter irritant drug products.

Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: chloral hydrate is included in external analgesic drug products - fever blister and cold sore treatment drug products.

Drug products containing certain active ingredients offered over-the-counter (OTC) for certain uses. A number of active ingredients have been present in OTC drug products for various uses, as described below. However, based on evidence currently available, there are inadequate data to establish general recognition of the safety and effectiveness of these ingredients for the specified uses: chloral hydrate is included in external analgesic drug products - poison ivy, poison oak, and poison sumac drug products.

For more FDA Requirements (Complete) data for CHLORAL HYDRATE (8 total), please visit the HSDB record page.

State Drinking Water Guidelines(ME) MAINE 70 ug/l
Federal Drinking Water GuidelinesEPA 60 ug/l

Sicherheitsdaten

wgk
2
tsca
TSCA listed
ridadr
UN 3286 3/PG 2
hs_code
29055900
RTECS-Nr.
FM8750000
risk_code
25-36/38-39/23/24/25-23/24/25-11-36/37/38-36-20/21/22

Chemie und Industrie

Pharmakologische Informationen

ATC Code · 2 Einträge

N - Nervous system

QN - Nervous system

Mechanism of Action · 1 Eintrag

Chloral hydrate has CNS depressant effects similar to those of paraldehyde and the barbiturates. The mechanism of action of the drug is not completely known. The CNS depressant effect of chloral hydrate is believed to result mainly from its metabolite, trichloroethanol, although some animal studies have indicated that the rapid onset of sedation and hypnosis that chloral hydrate produces may be due to chloral hydrate itself and that the prolonged duration of action may be due to trichloroethanol.

Biological Half-Life · 4 Einträge

The plasma half-life of trichloroethanol, the active metabolite, is about 7 to 10 hours.

The average half-life of trichloroethanol glucuronide was 6.7 hr. The average plasma half-life for chloral hydrate metabolites was 8.2 hr; the half-life of the third chloral hydrate metabolite, trichloroacetic acid, was about four days, as it binds extensively to plasma proteins.

The plasma half-life for therapeutic doses of chloral hydrate is 4 to 5 min, whereas for trichloroethanol /a metabolite/ is 8 to 12 hr and for trichloroacetic acid /a metabolite/, 67 hr.

This study was designed to characterize the kinetics of chloral hydrate (CH) metabolism, and the formation and elimination of trichloroacetate (TCA), dichloroacetate (DCA), trichloroethanol (TCOH), and trichloroethanol glucuronide (TCOG) in male B6C3F1 mice. Mice were dosed with 67.8, 678, and 2034 umol/kg of CH through the tail vein. ... After intravenous administration, CH rapidly disappeared from blood with a terminal half-life ranging from 5 to 24 min. ... The terminal half-lives of TCOH and TCOG were similar, ranging from 0.2 to 0.7 hr. ...

Metabolism/Metabolites · 6 Einträge

Metabolized by the liver and erythrocytes to form trichloroethanol, an active metabolite. This reaction is catalyzed by alcohol dehydrogenase and other enzymes. Oxidation of chloral hydrate and trichloroethanol to trichloroacetic acid in the liver and kidneys also occurs to a lesser extent. Trichloroethanol also undergoes glucuronidation to produce an inactive metabolism.

/Chloral hydrate/ biotransformation to trichloroethanol must be rapid, since no parent compound could be detected in even the first samples taken 10 min after administration of 15 mg/kg bw to volunteers.

Chloral hydrate is metabolized by the liver and erythrocytes to form trichloroethanol (an active metabolite). The reduction of chloral hydrate to trichloroethanol (the major metabolite) is catalyzed by alcohol dehydrogenase and other enzymes. ... A small but variable amount of chloral hydrate and a larger portion of trichloroethanol are oxidized to trichloroacetic acid (an inactive metabolite), mainly in the liver and kidneys. Trichloroethanol may also be conjugated with glucuronic acid to form trichloroethanol glucuronide (urochloralic acid), an inactive metabolite. ... The quantities of metabolites excreted in the urine appear to be quite variable not only between different individuals but may even vary in the same individual on different days.

In mammalian species, chloral hydrate is rapidly reduced to trichloroethanol, the metabolite that appears to be responsible for the hypnotic properties of the drug. ... In rodents, a slightly different metabolic pattern is seen, as chloral hydrate is oxidized directly to trichloroacetic acid, and the oxidative pathway from trichloroethanol to trichloroacetate that is observed in humans seems to be absent.

As < 50% of an administered dose of chloral hydrate was recovered as metabolites in urine, yet unknown biotransformation reactions may exist for chloral hydrate in humans.

For more Metabolism/Metabolites (Complete) data for CHLORAL HYDRATE (10 total), please visit the HSDB record page.

MeSH Pharmacological ClassificationDrugs used to induce drowsiness or sleep or to reduce psychological excitement or anxiety.
Absorption, Distribution and Excretion · 6 Einträge

Rapidly absorbed in the GI tract following oral or rectal administration. Chloral hydrate and its active metabolite, trichloroethanol, have been detected in CSF, umbilical cord blood, fetal blood, and amniotic fluid.

Trichloroethanol, trichloroethanol glucuronide, and trichloroacetic acid are excreted in the urine. Some trichloroethanol glucuronide may be secreted into bile and excreted in the feces.

Following therapeutic doses of chloral hydrate, only small, clinically insignificant amounts of the active metabolite are distributed into milk.

Chloral hydrate is rapidly absorbed from the GI tract following oral or rectal administration. Plasma concentrations of chloral hydrate (or the major metabolite, trichloroethanol) required for sedative or hypnotic effects are unknown. Following administration of a single chloral hydrate dose of 15 mg/kg, peak plasma concentrations of trichloroethanol ranged from 7-10 ug/mL in one study.

After oral administration, chloral hydrate is rapidly absorbed from the gastrointestinal tract. Peak levels of trichloroethanol and trichloroethanol glucuronide were reached within 20- 60 min after oral administration of aqueous solutions.

The volume of distribution of chloral hydrate is 0.6 L/kg.

Verwendung und Herstellung

Uses · 6 Einträge

Used as a drug (sedative and hypnotic), a rubefacient and liniment, a glue peptizing agent, and a chemical intermediate; [HSDB] Formed as by-product of drinking water chlorination; [IPCS]

Working with Glues and Adhesives [Category: Other]

As glue peptizing agent

Manufacture of DDT

Medicine (sedative), manufacture of DDT, linaments.

Hypnotic ... possesses anticonvulsant and muscle relaxant activities.

U.S. Imports · 4 Einträge

(1972) 2.83X10+7 G

(1975) 4.8X10+7 G

(1984) 5.41X10+6 g

(1986) 1.03X10+5 lb

U.S. Production · 2 Einträge

(1972) 1.14X10+10 G (ANHYDROUS CHLORAL)

Production volumes for non-confidential chemicals reported under the Inventory Update Rule. [Table#846]

Methods of Manufacturing · 3 Einträge

Made by adding required amt of water to trichloroacetaldehyde.

Insoluble chloral hydrate forms from the reaction of chloral with water.

Chloral hydrate is formed by adding one molecule of water to the carbonyl group of chloral (2,2,2-trichloroacetaldehyde).

Formulations/Preparations · 5 Einträge

Dosage Forms-Capsules: 250 and 500 mg, and 1 g; Elixir: 500 mg/5 mL; Suppositories: 325, 500, and 650 mg. Syrup: 250 and 500 mg/5 mL.

Noctec capsules contain 500 mg chloral hydrate per capsule, Noctec syrup contains 500 mg chloral hydrate per 5 mL

Grade: Technical, USP

Chloropent injection; Intravenous anesthetic; Each mL contains: chloral hydrate 42.5 mg; magnesium sulfate 21.2 mg; pentobarbital 8.86 mg; ethyl alcohol 14.25%; propylene glycol 33.8%; purified water, qs (for cattle & horses)

For more Formulations/Preparations (Complete) data for CHLORAL HYDRATE (7 total), please visit the HSDB record page.

Use ClassificationAnimal Drugs -> FDA Approved Animal Drug Products (Green Book) -> Active Ingredients
Anwendungen · 3 Einträge

BeschreibungFarblose, durchsichtige Kristalle von stechendem Geruch und schwach bitterem, brennendem Geschmack; leicht löslich in Wasser, Ethanol, Ether, Glycerin, Chloroform und fetten Ölen. NULL

BeschreibungChloral hydrate is one of the oldest sedatives used for dental sedation. It was first synthesized in 1832 by Justus von Liebig and was the first synthetic central nervous system (CNS) depressant. It was used to treat delirium tremens, insomnia, and anxiety, although it is considered an unapproved drug by the US Food and Drug Administration. Initially considered to be a safer alternative to opium, it was noted to produce rapid unconsciousness when combined with ethanol. Physical dependence can occur with chronic use.Chloral hydrate is classified as a sedative-hypnotic and is known to induce sleep in children. It has been very popular in pediatric dentistry since the mid-1950s. Chloral hydrate is rapidly absorbed following oral administration and is converted through its first pass in the liver to trichloroethanol,its active form. Trichloroethanol is conjugated in the liver and excreted in the urine. Like other agents that are metabolized in the liver, chloral hydrate may interact with other drugs, herbs, or foods resulting in clinically significant alterations of the agents (e.g.,warfarin).

VerwendenTrichloroacetaldehyde Hydrate is a useful chemical reagent used as a sedative/hypnotic agent for the short-term treatment of insomnia. First developed in 1832, chloral hydrate is the oldest sleep medication still in use today. This medication is also used to calm you just before surgery or other procedures. It works by affecting certain parts of the brain to cause calmness. Studies have shown that when used in pediatric sedation side effects such as hallucination, excessive sleep and seizures were observed. Drowsiness and trouble waking up in the morning, nausea, vomiting, stomach pain, diarrhea, and headache may occur. Stomach problems can be reduced by taking chloral hydrate with a full glass of water. It is sometimes administered to patients being treated with cyclophosphamide and it is known to inhibit some aldehyde dehydrogenases. Besides, Chloral hydrate is a starting point for the synthesis of other organic compounds. It is the starting material for the production of chloral, which is produced by the distillation of a mixture of chloral hydrate and sulfuric acid, which serves as the desiccant.

Anbieter50 Anbieter

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Ergänzende Hinweise · 1 Eintrag

DefinitionChEBI: Chloral hydrate is an organochlorine compound that is the hydrate of trichloroacetaldehyde. It has a role as a sedative, a general anaesthetic, a mouse metabolite and a xenobiotic. It is an organochlorine compound, an aldehyde hydrate and an ethanediol.

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