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Thoriumtetranitrat

Thorium nitrate

HCID 26293
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Grundinformationen

CAS
13823-29-5
Standard-SMILES
O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].O=[N+]([O-])[O-].[Th+4]
InChIKey
VGBPIHVLVSGJGR-UHFFFAOYSA-N
Summenformel
N4O12Th
Durchschnittliche Molmasse
480,06 g/mol
Monoisotopische Masse
479,98933

Namen und Bezeichner

Bevorzugter Name
Thorium nitrate
IUPAC
thorium(4+) tetranitrate
Lokaler Name
Thoriumtetranitrat
Englischer Name
THORIUM NITRATE HYDRATE
Summenformel
N4O12Th
Molmasse
480.06

Namen und Synonyme

THORIUM NITRATE13823-29-5Thorium tetranitrateThorium(4+) nitrateThorium(IV), nitrateNitric acid, thorium(4+) saltNitric acid, thorium(4+) salt (4:1)Thorium nitrate ((Th(NO3)4))THORIUM(IV) NITRATEDTXSID4065656IF944P467KRefChem:898005
Weitere Namen anzeigen
TRORIUMNITRATEthorium(4+)nitrateTHORIUM NITRATE GRthorium nitrate[ur]THORIUM (IV) NITRATEthoriumnitrate,solidThorium nitrate hydrTHORIUM NITRATE HYDRATE
DTXCID0034483237-514-1thorium(4+);tetranitrateNitric acid, thorium saltThorium nitrate, solid61443-54-7Thorium(IV) nitrate hydrate (99.8%-Th)16092-49-2

Datenbank-Bezeichner

CAS
13823-29-5、16092-49-2、61443-54-7
PubChem CID
26293
DTXSID
DTXSID4065656

Eigenschaften

Berechnete Struktureigenschaften

Polarare Oberfläche (TPSA)
252 Ų
H-Brücken-Donoren
0
H-Brücken-Akzeptoren
12
Frei drehbare Bindungen
0
Schwere Atome
17
Formalladung
0
Komplexität
18,8

Experimentelle und physikochemische Eigenschaften

Chemical ClassesPhysical/Radiation -> Radioactive Compounds
Color/Form · 2 Einträge

WHITE SOLID

White, crystalline mass

Solubility · 4 Einträge

White, crystals; very sol in water and alcohol; deliquescent /Thorium nitrate tetrahydrate/

SOL IN WATER

Sol in alcohols, ketones, ethers, esters

Sol in water, alc.

Melting Point · 3 Einträge

White, crystalline mass. MP: 500 °C (decomposes). Soluble in water and alcohol. /Tetrahydrate/

Swells at melting point; Very soluble in water, alchol, acids. /Thorium nitrate tetrahydrate/

White hygroscopic crystals; MP: decomposes at 500 °C; very soluble in water, soluble in ethanol /Tetrahydrate/

Physical DescriptionWhite crystalline material; [CAMEO]
Other Experimental Properties · 4 Einträge

Forms a weak soln of nitric acid; soln in water are acidic and can corrode metals /Thorium nitrate tetrahydrate/

Specific gravity (estimated): Greater than 1 at 20 °C (solid) /Thorium nitrate tetrahydrate/

Strong oxidizing agent /Thorium nitrate tetrahydrate/

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 · 6 Einträge

This chemical does not meet GHS hazard criteria for 3% (2 of 67) of reports.

Danger

H272 (65.7%): May intensify fire; oxidizer [Danger Oxidizing liquids; Oxidizing solids]

P210, P220, P260, P261, P264, P264+P265, P270, P271, P273, P280, P301+P317, P302+P352, P304+P340, P305+P351+P338, P319, P321, P330, P332+P317, P337+P317, P362+P364, P370+P378, P391, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 67 reports by companies from 8 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Danger

Gefahrenhinweise

Regulatory Information · 3 Einträge

Chemical: Nitric acid, thorium(4+) salt

Nitric acid, thorium(4+) salt: 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.)

Other Safety InformationIMAP assessments - Nitric acid, thorium(4+) salt: Human health tier I assessment
Fire PotentialOXIDIZING MATERIAL. ... INCREASES THE FLAMMABILITY OF ANY COMBUSTIBLE SUBSTANCE.
Hazards Summary · 1 Eintrag

An alpha emitter with small beta and gamma emission; Toxic if ingested or inhaled; In fire, toxic oxides of nitrogen are produced. Minimal radiation hazard in transport. No protective shielding for packages is required. [CAMEO] See Thorium.

FDA Requirements · 1 Eintrag

Chemie und Industrie

Pharmakologische Informationen

Biological Half-LifeThe effective half-life of inhaled thorium-227 nitrate (radioactive half-life of 18.7 days and biological half-life of about 20 days) in the lungs of rats was found to be about 10 days.
Absorption, Distribution and Excretion · 3 Einträge

... Less than 0.001% is absorbed /from the gastrointestinal tract/ at doses of 500 to 800 mg/kg thorium nitrate and 0.05% at doses of 5 mg/kg.

... Thorium (as the nitrate) binds strongly to the (bovine) cortical bone glucoprotein, sialoprotein, which has a high density distribution of carboxylic acid groups along the protein chain; 42% of the amino acids in bone sialoprotein are either aspartic or glutamic acids, and are mainly responsible for binding of highly charged thorium ions.

Analytical microscopy was used to study the distribution and chemical composition of thorium deposits in bone marrow and liver after injection of thorium dioxide and thorium nitrate. Thorotrast (thorium dioxide) was identified as being localized in bone marow macrophages of a patient who had undergone cerebral arteriography forty two years ago. Large thorotrast deposits were also present in liver cells. Non-colloidal thorium (thorium nitrate) injected in rats concentrated in a non-soluble form in bone marrow macrophages, hepatocytes and Kupffer cells. These deposits of thorium associated with phosphorus can be explained by the formation of thorium phosphate in lysosomes that remain in tissue for a long time.

Verwendung und Herstellung

Uses · 5 Einträge

Used as a chemical reagent; Used with 1% cerium nitrate to make mantles for lanterns; [Merck Index # 9376]

Thorium nitrate with 1% cerium nitrate constitutes the usual impregnating liq for incandescent mantles; as a reagent for determination of fluorine

Reagent for determination of fluorine, thoriated tungsten filaments. /Tetrahydrate/

Fluoride analysis through volumetric analysis by titration with thorium nitrate.

The /thorium/ nitrate form was ... used to produce thoriated tungsten elements used in the negative poles (cathodes) of magnetron tubes and traveling wave tubes, also known as TWT's.

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Auf dieser SeiteGrundinformationenNamen und BezeichnerEigenschaftenSicherheit und RegulatorischesChemie und IndustrieZugehörige ReaktionenNotizen zur Verbindung
UNII
IF944P467K
EC Number
237-514-1、812-565-8

Colorless leaflets, deliquescent; decomposes at melting point; very sol in cold water, alcohol, sol in acid /Thorium nitrate dodecahydrate/

Physikochemische Eigenschaften

Schmelzpunkt
500 ℃ · decomposes at 500℃ [CRC10]
Löslichkeit
2 O, · very soluble in H2O, ethanol
Aggregatzustand
Solid
Farbe
hygroscopic white plates
Wasserlöslichkeit
100 g · g/100g H2O: 186 (0°C), 187 (10°C), 191 (20°C) [LAN05]; additional solubility data are in [SIE94]
Merck
13 · 13,9454
Stabilität
Stable. Deliquescent. Weakly radioactive (radioactivity 3300 Bq/g). Incompatible with reducing agents.
InChI
InChI=1S/4NO3.Th/c4*2-1(3)4;/q4*-1;+4
InChIKey
VGBPIHVLVSGJGR-UHFFFAOYSA-N
SMILES
[N+]([O-])([O-])=O.[N+](=O)([O-])[O-].[N+]([O-])([O-])=O.[N+]([O-])([O-])=O.[Th+4]
CAS Datenbank
13823 · 13823-29-5(CAS DataBase Reference)
EPA chemische Informationen
Thorium nitrate (13823-29-5)

Bottled water shall, when a composite of analytical units of equal volume from a sample is examined by the methods described in paragraph (d)(1)(ii) of this section, meet the standards of chemical quality and shall not contain nitrate (as N) in excess of 10 mg/l. /Nitrate (as N)/

Special ReportsSridhar TS; Fuel Reprocess Waste Mgt 1: 371-85 (1984)
Atmospheric StandardsRadionuclides has been designated as a hazardous air pollutant under section 112 of the Clean Air Act. /Radionuclides/
DOT Emergency Guidelines · 5 Einträge

/GUIDE 162: RADIOACTIVE MATERIALS (LOW TO MODERATE LEVEL RADIATION)/ Health: Radiation presents minimal risk to transport workers, emergency response personnel and the public during transportation accidents. Packaging durability increases as potential hazard of radioactive content increases. Undamaged packages are safe. Contents of damaged packages may cause higher external radiation exposure, or both external and internal radiation exposure if contents are released. Low radiation hazard when material is inside container. If material is released from package or bulk container, hazard will vary from low to moderate. Level of hazard will depend on the type and amount of radioactivity, the kind of material it is in, and/or the surfaces it is on. Some material may be released from packages during accidents of moderate severity but risks to people are not great. Released radioactive materials or contaminated objects usually will be visible if packaging fails. Some exclusive use shipments of bulk and packaged materials will not have "RADIOACTIVE" labels. Placards, markings and shipping papers provide identification. Some packages may have a "RADIOACTIVE" label and a second hazard label. The second hazard is usually greater than the radiation hazard; so follow this GUIDE as well as the response GUIDE for the second hazard class label. Some radioactive materials cannot be detected by commonly available instruments. Runoff from control of cargo fire may cause low-level pollution. /Thorium nitrate, solid/

/GUIDE 162: RADIOACTIVE MATERIALS (LOW TO MODERATE LEVEL RADIATION)/ Fire or Explosion: Some of these materials may burn, but most do not ignite readily. Uranium and Thorium metal cuttings may ignite spontaneously if exposed to air ... . Nitrates are oxidizers and may ignite other combustibles ... . /Thorium nitrate, solid/

/GUIDE 162: RADIOACTIVE MATERIALS (LOW TO MODERATE LEVEL RADIATION)/ Public Safety: CALL Emergency Response Telephone Number ... . Priorities for rescue, life-saving, first aid, fire control and other hazards are higher than the priority for measuring radiation levels. Radiation Authority must be notified of accident conditions. Radiation Authority is usually responsible for decisions about radiological consequences and closure of emergencies. As an immediate precautionary measure, isolate spill or leak area for at least 25 meters (75 feet) in all directions. Stay upwind. Keep unauthorized personnel away. Detain or isolate uninjured persons or equipment suspected to be contaminated; delay decontamination and cleanup until instructions are received from Radiation Authority. /Thorium nitrate, solid/

/GUIDE 162: RADIOACTIVE MATERIALS (LOW TO MODERATE LEVEL RADIATION)/ Protective Clothing: Positive pressure self-contained breathing apparatus (SCBA) and structural firefighters' protective clothing will provide adequate protection. /Thorium nitrate, solid/

For more DOT Emergency Guidelines (Complete) data for THORIUM NITRATE (8 total), please visit the HSDB record page.

Toxic Combustion ProductsYields toxic gaseous oxides of nitrogen when involved in fire.
CERCLA Reportable Quantities · 5 Einträge

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 100 curie or 3.7x10+12 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(226)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 1 curie or 3.7x10+10 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(227)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 0.01 curie or 3.7x10+8 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(228)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 0.001 curie or 3.7x10+7 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(229)Thorium/

For more CERCLA Reportable Quantities (Complete) data for THORIUM NITRATE (8 total), please visit the HSDB record page.

Hazard Classes and Categories · 2 Einträge

Ox. Sol. 2 (65.7%)

Skin Irrit. 2 (100%)

Standard Transportation Number49 263 10; Thorium nitrate

Sicherheit und Schutzausrüstung

Fire Fighting Procedures · 4 Einträge

If material on fire or involved in fire: Contact the local, state or Department of Energy Radiological Response Team. Flood with water. Cool all affected containers with flooding quantities of water. Apply water from as far a distance as possible.

USE FLOODING AMT OF WATER IN EARLY STAGES OF FIRE. WHEN LARGE QUANTITIES ARE INVOLVED IN FIRE, NITRATE MAY FUSE, OR MELT, IN WHICH CONDITION APPLICATION OF WATER MAY RESULT IN EXTENSIVE SCATTERING OF MOLTEN MATERIAL.

In fire conditions wear self contained breathing apparatus.

Evacuation: If fire becomes uncontrollable, consider evacuation of one half (1/2) mile radius. Keep unnecessary people out of incident area until area declared safe by Radiological Response Team.

Storage Conditions · 3 Einträge

PROTECT AGAINST PHYSICAL DAMAGE. STORE IN COOL, DRY PLACE. SEPARATE FROM COMBUSTIBLE, ORGANIC OR OTHER READILY OXIDIZABLE MATERIALS. AVOID STORAGE ON WOOD FLOORS. IMMEDIATELY REMOVE AND DISPOSE OF ANY SPILLED NITRATE.

KEEP WELL CLOSED. /THORIUM NITRATE TETRAHYDRATE/

During transport: Storage temperature: ambient; Venting: open; Stability: stable /Thorium nitrate tetrahydrate/

Disposal Methods · 2 Einträge

SRP: At the time of review, criteria for land treatment or burial (sanitary landfill) disposal practices are subject to significant revision. Prior to implementing land disposal of waste residue (including waste sludge), consult with environmental regulatory agencies for guidance on acceptable disposal practices.

Disposal of ... wastes /containing uranium/ should follow guidelines set forth by the Nuclear Regulatory Commission & the EPA. /Uranium & cmpd/

Preventive Measures · 3 Einträge

If material not on fire & not involved in fire: Contact the local, state, or Department of Energy Radiological Response Team. Keep sparks, flames, & other sources of ignition away. Keep material out of water sources & sewers.

Personnel protection: Keep upwind. Avoid breathing dusts, & fumes from burning material. ... Do not handle broken packages unless wearing appropriate personal protective equipment. Wash away any material which may have contacted the body with copious amounts of water or soap & water.

SRP: Contaminated protective clothing should be segregated in such a manner so that there is no direct personal contact by personnel who handle, dispose, or clean the clothing. Quality assurance to ascertain the completeness of the cleaning procedures should be implemented before the decontaminated protective clothing is returned for reuse by the workers. Contaminated clothing should not be taken home at end of shift, but should remain at employee's place of work for cleaning.

Protective Action Criteria (PAC) · 3 Einträge

2.9 [mg/m3]

32 [mg/m3]

190 [mg/m3]

Other Standards Regulations and GuidelinesIn the eastern block countries ... the threshold limit for thorium has been set at 0.05 mg/cu m in workroom air. /Thorium and cmpd/

Toxikologische Informationen

Environmental Bioconcentration · 1 Eintrag

/Rainbow trout were exposed to thorium (as the nitrate salt) added to water taken from the Columbia River./ Due to its rate of hydrolysis, thorium transfer ... /was/ low & does not exhibit a marked tendency to accumulate in biological tissue.

Non-Human Toxicity Excerpts · 5 Einträge

THORIUM NITRATE PRODUCED PROGRESSIVE MORPHOLOGICAL & BIOCHEMICAL ALTERATIONS IN RAT TESTIS WHEN ADMIN DAILY IP. THE DEGENERATIVE CHANGES IN THE SEMINIFEROUS TUBULES INCR WITH THE DURATION OF THE TREATMENT AND AFTER 90 DAYS CALCIFICATION OCCURRED IN ABOUT 25% OF THE TUBULES AND IN THE CONNECTIVE TISSUE OF THE TUNICA ALBUGINEA. THE ACTIVITY OF ATPASE AND ALKALINE PHOSPHATASE INCR MARKEDLY.

IP ADMIN OF 10 MG THORIUM NITRATE/KG/DAY FOR 120 DAYS TO RATS CAUSED DECREASES IN ALKALINE PHOSPHATASE & ADENOSINE TRIPHOSPHATASE IN THE KIDNEYS AND LIVER.

... One ml doses of 5%, 10%, and 20% thorium nitrate /were applied daily/ to the skin in the lateroabdominal and scrotal areas of male albino rats for 15 days. The animals were sacrified 15 days later. ... There was no gross abnormality in skin, liver, kidneys, or testes of any of the rats. ... Mild degenerative changes were found in the skin and testes of animals receiving the 20% thorium soln. Skin lesions consisted of ... acanthosis & thickening of epithelial lining. Testicular lesions consisted of ... edema of seminiferous tubules & interstitium & desquamation of the spermatogenic cells. A few tubules carried spermatid type giant cells.

Dietary levels of 3% /thorium/ nitrate were required before growth depression occurred in rats; a dog showed growth depression (15%) on 1 g nitrate/kg daily, in a 46-day study.

For more Non-Human Toxicity Excerpts (Complete) data for THORIUM NITRATE (9 total), please visit the HSDB record page.

Probable Routes of Human ExposureWorkers in plants where ... thorium nitrate is used in the manufacture of gas mantles, have not experienced effects attributable to chemical toxicity or radiation injury.
Antidote and Emergency Treatment · 2 Einträge

Basic Treatment: Establish a patent airway. Suction if necessary. Watch for signs of respiratory insufficiency and assist ventilations if necessary. Administer oxygen by nonrebreather mask at 10 to 15 L/min. Monitor for shock and treat if necessary ... . Anticipate seizures and treat as necessary ... . For eye contamination, flush eyes immediately with water. Irrigate each eye continuously with normal saline 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. Administer activated charcoal ... . /Nitrates, Nitrites, and related compounds/

Advanced Treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious or in respiratory arrest. Monitor cardiac rhythm and treat arrhythmias if necessary ... . Start an IV with D5W /SRP: "To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. For hypotension with signs of hypovolemia, administer fluid cautiously. If unresponsive to these measures, vasopressors may be helpful. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Administer 1% solution methylene blue if patient is symptomatic with severe hypoxia, cyanosis, and cardiac compromise not responding to oxygen. ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Nitrates, nitrites, and related compounds/

Non-Human Toxicity Values · 5 Einträge

LD50 Rat intravenous 47.6 mg/kg /Thorium nitrate tetrahydrate/

LD100 Rabbit intravenous 57 mg/kg /Thorium nitrate tetrahydrate/

LD50 Rat intratracheal 88 mg/kg /Thorium nitrate tetrahydrate/

LD50 Rat intraperitoneal 68 mg/kg /Thorium nitrate tetrahydrate/

For more Non-Human Toxicity Values (Complete) data for THORIUM NITRATE (7 total), please visit the HSDB record page.

Regulatorische Informationen

FDA Requirements · 1 Eintrag

Bottled water shall, when a composite of analytical units of equal volume from a sample is examined by the methods described in paragraph (d)(1)(ii) of this section, meet the standards of chemical quality and shall not contain nitrate (as N) in excess of 10 mg/l. /Nitrate (as N)/

Atmospheric StandardsRadionuclides has been designated as a hazardous air pollutant under section 112 of the Clean Air Act. /Radionuclides/
CERCLA Reportable Quantities · 5 Einträge

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 100 curie or 3.7x10+12 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(226)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 1 curie or 3.7x10+10 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(227)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 0.01 curie or 3.7x10+8 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(228)Thorium/

Persons in charge of vessels or facilities are required to notify the National Response Center (NRC) immediately, when there is a release of this designated hazardous substance, in an amount equal to or greater than its reportable quantity of 0.001 curie or 3.7x10+7 becquerel. The toll free number of the NRC is (800) 424-8802; In the Washington D.C. metropolitan area (202) 426-2675. The rule for determining when notification is required is stated in 40 CFR 302.4 (section IV. D.3.b). /(229)Thorium/

For more CERCLA Reportable Quantities (Complete) data for THORIUM NITRATE (8 total), please visit the HSDB record page.

Sicherheitsdaten

tsca
TSCA listed
ridadr
2915
RTECS-Nr.
XO6825000
risk_code
8-22-33-36/37/38-51/53
hazard_code
O,Xn,R,N
safety_code
36/37/39-45-61
hazard_class
7
Giftige Stoffe Daten
13823-29-5(Hazardous Substances Data)
U.S. Imports(1986) 47,474 lb
Methods of Manufacturing · 2 Einträge

Obtained from monazite: Pearce et al, Inorg Syn II, 38 (1946).

Nitric acid dissolves thorium hydroxide yielding thorium nitrate. Depending on acidity, the pentahydrate, tetrahydrate, or the addition product, Th(NO3)4.2N2O5 may crystallize. If the nitrogen oxides are removed from the latter cmpd, /unstable/ anhydrous nitrate is obtained.

Formulations/Preparations · 2 Einträge

Grades: technical; CP /Tetrahydrate/

Commercial form obtained as tetrahydrate ...

General Manufacturing Information · 3 Einträge

Nitric acid, thorium(4+) salt (4:1): ACTIVE

The National Defense Authorization Act enacted on November 18, 1997 did not change the previous authorization for the disposal of all stocks of thorium nitrate in excess of the National Defense Stockpile goal of 272,155 kg (600,000 lbs).

Government stocks of thorium nitrate in the National Defense Stockpile were 3,216,828 kg (7,091,891 lbs) on December 31, 1998.

Anwendungen

VerwendenReagent for determination of fluorine, thoriated tungsten filaments.

Darstellung · 1 Eintrag

synthetischeThe phosphates are dissolved in cone, hydrochloric acid and precipitated with oxalic acid, and the thoroughly washed precipitate is extracted with warm aqueous Na2CO3. Most of the rare earths stay in the residue, while the thorium dissolves in the form of a carbonate complex, Na6Th(CO3)5. The material is freed of the remaining traces of rare earths by repeated crystallization in the form of the sulfate Th(SO4)28H2O. The procedure consists of precipitation of the hydroxide with ammonia and solution of the latter in sulfuric acid to re-form the sulfate. The precipitate from the last purification stage is dissolved in nitric acid to yield the nitrate.

Vor- und nachgelagerte Produkte

Nachgelagerte Produkte

Thorium(IV) nitrate tetrahydrate.Thoriumtetrahydroxid

Anbieter57 Anbieter

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