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HCID 23993Erstellt: 26. Oktober 2026

Yttrium

https://huagongshe.com/de/chemical/23993

Molekülstruktur von Yttrium

Identifikatoren & physikalische Daten

CAS No.13598-57-7
SummenformelY
Durchschnittliche Molmasse88,9058 g/mol
Monoisotopische Masse88,9058483 g/mol
SMILES[Y]
InChIKeyVWQVUPCCIRVNHF-UHFFFAOYSA-N
PubChem CID23993
ChEMBLCHEMBL4650626
ChEBICHEBI:49978
EC No.231-174-8
DTXSIDDTXSID0049816

Chemische & physikalische Eigenschaften

Polarare Oberfläche (TPSA)0
H-Brücken-Donoren0
H-Brücken-Akzeptoren0
Frei drehbare Bindungen0
Schwere Atome1
Formalladung0
Komplexität0
StoffklassenMetals -> Rare Earth Metals
SpringerMaterials Propertieselectron density of states
GeruchOdorless
Dichte4.47 (NIOSH, 2024) - Denser than waterwill sink4.47 g/cu cm4.47 @25 °C
Color/FormIron-gray, lustrous powderdarkens on exposure to lightHexagonal, silvery-metallic colored element...gray-black when finely divided. Brittle...harder than zinc.
LöslichkeitSoluble in hot H2O (NIOSH, 2024)Decomposes in waterSoluble in dilute acids and potassium hydroxide solutionSoluble in hot H2O
Siedepunkt5301 °F at 760 mmHg (NIOSH, 2024)3345 °C3345 °C @760 [mm Hg]
Schmelzpunkt2732 °F (NIOSH, 2024)1522 °C1526 °C
Dampfdruck0 mmHg (approx) (NIOSH, 2024)6.66X10-11 Pa at 1000 K2.96x10-7 Pa at 1200 K1.17x10-4 Pa at 1400 K1.02x10-2 Pa at 1600 K0.316 Pa at 1800 K4.27 Pa at 2000 K35.9 Pa at 2200 K
Physical DescriptionSoft silvery-white metal in bulk. Dark-gray to black odorless powder. Mp: 1509 °Cbp 2927 °C. Density: 4.47 g cm-3 at 20 °C. May irritate the respiratory tract if inhaled as a powder. May irritate the digestive tract if swallowed. Vapors may cause dizziness or suffocation.Dark-gray to black, odorless solid[CAMEO] Some compounds, e.g., nitrates, are soluble in water[ACGIH]Dark-gray to black, odorless powder. Soft silvery-white metal in bulk.Dark-gray to black, odorless solid.
Other Experimental PropertiesNatural yttrium contains but one isotope, yttrium-89. Forty-three other unstable isotopes and isomers have been characterized.Oxidizes on heating in air or oxygendecomposes on cold water slowly, in boiling water rapidly.Known only in the tripositive stateHeat of fusion = 11.43 kJ/molHeat of sublimation = 424.7 kJ/mol at 25 °CStandard enthalpy of formation at 298.15 K, 0.0 kJ/mol (crystal)entropy at 298.15 K, 44.4 J/mol-K (crystal)Heat capacity, 26.5 J/mol-K (crystal)Standard enthalpy of formation at 298.15 K, 421.3 kJ/mol (gas phase)Gibbs free energy of formation, 381.1 kJ/mol (gas phase)entropy at 298.15 K, 179.5 J/mol-K (gas phase)Heat capacity 25.9 J/mol-K (gas phase).

Sicherheit & Vorschriften

GHS-EinstufungThis chemical does not meet GHS hazard criteria for 56.8% (180 of 317) of all reports.DangerH228 (31.2%): Flammable solid [Danger Flammable solids]P210, P222, P231, P233, P240, P241, P261, P264, P270, P271, P273, P280, P301+P317, P302+P335+P334, P302+P352, P304+P340, P317, P321, P330, P362+P364, P370+P378, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 317 reports by companies from 9 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Warning
Regulatorische InformationenStatus: Active Update: 12-12-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/22904Yttrium, powder: Does not have an individual approval but may be used under an appropriate group standard
DOT-KennzeichnungFlammable Solid
BrandgefahrenExcerpt from ERG Guide 133 [Flammable Solids]:
GesundheitsgefahrenExcerpt from NIOSH Pocket Guide for Yttrium:
GefahrenübersichtTLV Basis: pulmonary fibrosis in rats after single intratracheal administration of a very large doseIn animal studies, it is moderately toxic by the intraperitoneal routeA dose of 50 mg/kg caused hepatic necrosis. Workers producing yttrium europium vanadate phosphor and inhaling an average of 1.4 mg/m3 complained of irritation of the skin, eyes and respiratory tractThis effect was attributed to vanadium. [ACGIH] See the radionuclide, Yttrium-90. See RARE EARTH METALS and linked occupational diseases.
Reaktive GruppeMetals, Elemental and Powder, Active
Reactivity AlertsStrong Reducing Agent
Reactivity ProfileYTTRIUM in bulk is stable in air due to the formation of oxide films. Powder or dust is light-sensitive and air-sensitive and flammable in the air and (Hazardous Chemicals Desk Reference, p. 861 (1987)). Reacts with water to form gaseous hydrogen (H2). Reacts with strong oxidizing agents, strong acids, strong bases, and halogens. The products of these reactions are irritating and toxic.
Flammable LimitsNoncombustible Solid in bulk form.
Air and Water ReactionsAir sensitive. Light sensitive. Moisture sensitive.
NIOSH RecommendationsRecommended Exposure Limit: 10 Hr Time-Weighted Avg: 1 mg/cu m
Hazard Classes and CategoriesFlam. Sol. 2 (31.2%)Specific target organ toxicity - Single exposure - Category 2 (lung)
BrandbekämpfungExcerpt from ERG Guide 133 [Flammable Solids]:
Erste HilfeExcerpt from NIOSH Pocket Guide for Yttrium:(General first aid procedures)
Freisetung ohne BrandExcerpt from ERG Guide 133 [Flammable Solids]:
Isolation and EvacuationExcerpt from ERG Guide 133 [Flammable Solids]:
Respirator RecommendationsNIOSH/OSHA
Threshold Limit Values (TLV)1.0 [mg/m3], as Y1 mg/m³ [1986]
Permissible Exposure Limit (PEL)1.0 [mg/m3], as Y1 mg/m³TWA 1 mg/m3 [*Note: The PEL also applies to other yttrium compounds (as Y).]
Protective Action Criteria (PAC)3.0 [mg/m3]83 [mg/m3]500 [mg/m3]
Recommended Exposure Limit (REL)1 mg/m³TWA 1 mg/m3 [*Note: The REL also applies to other yttrium compounds (as Y).]
Personal Protective Equipment (PPE)Excerpt from NIOSH Pocket Guide for Yttrium:Respirator Recommendations: Up to 5 mg/cu m: (APF = 5) Any quarter-mask respirator.Respirator Recommendations: Up to 10 mg/cu m: (Assigned Protection Factor = 10) Any particulate respirator equipped with an N95, R95, or P95 filter (including N95, R95, and P95 filtering facepieces) except quarter-mask respirators. The following filters may also be used: N99, R99, P99, N100, R100, P100. (Assigned Protection Factor = 10) Any supplied-air respirator.Respirator Recommendations: Up to 25 mg/cu m: (Assigned Protection Factor = 25) Any supplied-air respirator operated in a continuous-flow mode. (Assigned Protection Factor = 25) Any powered air-purifying respirator with a high-efficiency particulate filter.Respirator Recommendations: Up to 50 mg/cu m: (Assigned Protection Factor = 50) Any air-purifying, full-facepiece respirator with an N100, R100, or P100 filter. (Assigned Protection Factor = 50) Any supplied-air respirator that has a tight-fitting facepiece and is operated in a continuous-flow mode. (Assigned Protection Factor = 50) Any powered, air-purifying respirator with a tight-fitting facepiece and a high-efficiency particulate filter. (Assigned Protection Factor = 50) Any self-contained breathing apparatus with a full facepiece. (Assigned Protection Factor = 50) Any supplied-air respirator with a full facepiece.For more Personal Protective Equipment (PPE) (Complete) data for YTTRIUM, ELEMENTAL (7 total), please visit the HSDB record page.
Immediately Dangerous to Life or Health (IDLH)500 mg Y/m3 (NIOSH, 2024)500.0 [mg/m3]500 mg/cu m500 mg/m³500 mg/m3 (as Y)
ZielorganeEyes, respiratory system, liver
Unerwünschte WirkungenOccupational hepatotoxin - Secondary hepatotoxins: the potential for toxic effect in the occupational setting is based on cases of poisoning by human ingestion or animal experimentation.
Expositionspfadeinhalation, ingestion, skin and/or eye contact
Signs and Symptomsirritation eyesIn Animals: pulmonary irritationeye injurypossible liver damage
Antidote and Emergency TreatmentBasic treatment: Establish a patent airway. 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 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 ... . Cover skin burns with dry sterile dressings after decontamination ... . /Poison A and B/Advanced treatment: Consider orotracheal or nasotracheal intubation for airway control in the patient who is unconscious, has severe pulmonary edema, or is in respiratory arrest. Positive pressure ventilation techniques with a bag valve mask device may be beneficial. Consider drug therapy for pulmonary edema ... . Monitor cardiac rhythm and treat arrhythmias as necessary ... . Start an IV with D5W TKO /"To keep open", minimal flow rate/. Use lactated Ringer's if signs of hypovolemia are present. Watch for signs of fluid overload. For hypotension with signs of hypovolemia, administer fluid cautiously. Watch for signs of fluid overload ... . Treat seizures with diazepam (Valium) ... . Use proparacaine hydrochloride to assist eye irrigation ... . /Poison A and B/
AlarmwortWarnung
GefahrenhinweiseCode Gefahrenhinweise Gefahrenklasse Abteilung Alarmwort Symbol P-Code H228