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Strontium

HCID 5359327
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Grundinformationen

CAS
10098-97-2
Standard-SMILES
[Sr]
InChIKey
CIOAGBVUUVVLOB-UHFFFAOYSA-N
Summenformel
Sr
Durchschnittliche Molmasse
87,62 g/mol
Monoisotopische Masse
87,9056121

Überblick

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is either referred to as stable strontium or strontium. Strontium in the environment exists in four stable isotopes,84Sr (read as strontium eighty-four),86Sr,87Sr,88Sr. Strontium compounds are used in making ceramics and glass products, pyrotechnics, paint pigments, fluorescent lights, and medicines. Strontium can also exist as several radioactive isotopes; the most common is90Sr.90Sr is formed in nuclear reactors or during the explosion of nuclear weapons. Radioactive strontium generates beta particles as it decays. One of the radioactive properties of strontium is half-life, or the time it takes for half of the isotope to give off its radiation and change into another substance. The half-life of90Sr is 29 years.

Namen und Bezeichner

Bevorzugter Name
Strontium
IUPAC
strontium

Namen und Synonyme

STRONTIUM7440-24-6Strontium, elementalYZS2RPE8LESRDTXSID3024312CHEBI:33324Strontium MetallicumRefChem:56052DTXCID50875720231-133-4strontium atom
Weitere Namen anzeigen
Atomic StrontiumStrontium elementMFCD00134060MFCD00011247estroncioStrontium, distilled dendritic piecesHSDB 2545UNII-YZS2RPE8LE

Datenbank-Bezeichner

CAS
10098-97-2、13967-73-2、13982-14-4、13982-64-4、14119-10-9、14158-27-1、14331-91-0、14809-49-5、14809-50-8、14809-51-9、14928-29-1、15701-15-2、7440-24-6
PubChem CID
5359327
DTXSID
DTXSID3024312
ChEMBL
CHEMBL1201359
ChEBI
CHEBI:33324
UNII
YZS2RPE8LE
EC Number
231-133-4

Eigenschaften

Berechnete StruktureigenschaftenWird ergänzt

Polarare Oberfläche (TPSA)
0 Ų
H-Brücken-Donoren
0
H-Brücken-Akzeptoren
0
Frei drehbare Bindungen
0
Schwere Atome
1
Formalladung
0
Komplexität
0

Experimentelle und physikochemische Eigenschaften

Chemical Classes · 2 Einträge

Metals -> Elements, Metallic

Trace element

SpringerMaterials Propertieselectron density of states
PesticidesPesticide -> EPA IRIS
Density · 3 Einträge

2.54 g/cu cm

2.64 g/cm³

2.64 @25 °C

Color/Form · 2 Einträge

Silvery white metal; face-centered cubic structure

Pale yellow soft metal

Solubility · 2 Einträge

Soluble in alcohol and acids.

Solubility in water: reaction

Boiling Point · 3 Einträge

1390 °C

1384 °C

1382 °C @760 [mm Hg]

Melting Point · 3 Einträge

752 °C

757 °C

777 °C

Vapor Pressure4.99X10-11 Pa at 400 K; 0.000429 Pa at 600 K; 1.134 Pa at 800 K; 121 Pa at 1000 K

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 17.1% (52 of 304) of reports.

Danger

H260 (80.6%): In contact with water releases flammable gases which may ignite spontaneously [Danger Substances and mixtures which in contact with water, emit flammable gases]

P203, P223, P231+P232, P260, P264, P264+P265, P280, P301+P330+P331, P302+P335+P334, P302+P352, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P318, P321, P332+P317, P362+P364, P363, P370+P378, P402+P404, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 304 reports by companies from 11 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Danger

Gefahrenhinweise

Regulatory Information · 4 Einträge

Chemical: Strontium

Strontium is listed on the EPA's Chemical Data Reporting (CDR) system. Manufacturers and importers of Strontium are required to report information about their production and use of this chemical to the EPA under the Toxic Substances Control Act (TSCA). (40 eCFR Part 711)

Status: Active Update: 05-10-2022 https://echa.europa.eu/registration-dossier/-/registered-dossier/19651

Strontium: HSNO Approval: HSR006486 Approved with controls

Other Safety InformationIMAP assessments - Strontium: Human health tier I assessment
Fire HazardsNot combustible but forms flammable gas on contact with water or damp air.
Fire Potential · 2 Einträge

The finely divided metal ignites spontaneously in air.

... Ignites when heated above its mp ...

Hazards Summary

Chemie und Industrie

Verwendung und Herstellung

Uses · 6 Einträge

Used in fireworks, signal flares, and tracer bullets (red); [Merck Index] Used as an alloy and in electron tubes; [Hawley] Strontium compounds, such as strontium carbonate, are used in making ceramics and glass products, pyrotechnics, paint pigments, fluorescent lights, medicines, and other products. [ATSDR PHS] Strontium metal is used in aluminum castings, and strontium carbonate is used as getters in zinc production; [Reference #2]

Aluminum Producing [Category: Industry]

Ceramics making [Category: Hobbies]

In fireworks, in red signal flares; on tracer bullets. Eutectic modifier in Al-Ag casting alloys to improve strength and ductility. Innoculant in ductile iron casting to control graphite formation.

Added to alloys of tin and lead to add hardness and durability, deoxidizer in copper and bronze.

Alloys, "getter" in electron tubes

U.S. Production2023: 1,000,000 - <2,500,000 lb
Consumption PatternsStrontium metal is a very limited part of total strontium consumption.
Consumer UsesIntermediate
Industry UsesIntermediate
Methods of Manufacturing · 2 Einträge

... Thermal reduction of the oxide with metallic aluminum (strontium aluminum alloy formed), and distilling the strontium in a vacuum.

Variant of the Pidgeon process: reaction of strontium oxide and aluminum is produced under vacuum where the strontium evolves as a gas and is transported through the production retort to a cooler end where it precipitates as a solid.

Formulations/Preparations · 2 Einträge

Grades: Technical

Available as a pure metal and as an alloy with aluminum or aluminum/magnesium.

Use ClassificationChemical Classes -> Inorganic substances, Radionuclides (radioactive materials)

Zugehörige Reaktionen

14
Reaktionsaufzeichnung erstellen
Reaktionsgleichung von HRID 21422
HRID 21422als Eduktuspto-grants-1995_06
Reaktionsgleichung von HRID 129382
HRID 129382als Eduktuspto-grants-1995_11
Reaktionsgleichung von HRID 387422
HRID 387422als Eduktuspto-grants-2013_02
Reaktionsgleichung von HRID 389328
HRID 389328als Eduktuspto-grants-2013_02
Reaktionsgleichung von HRID 440612
HRID 440612als Eduktuspto-grants-1996_05
Reaktionsgleichung von HRID 812220
HRID 812220als ProduktTest data from https://doi.org/10.1039/C8SC04228D
Reaktionsgleichung von HRID 836383
HRID 836383als ProduktTest data from https://doi.org/10.1039/C8SC04228D
Reaktionsgleichung von HRID 1421847
HRID 1421847als Eduktuspto-grants-2000_06
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Physical Description · 3 Einträge

Other Solid

Silvery-white metal that becomes yellow on contact with air; [Merck Index]

SILVERY-WHITE SOLID IN VARIOUS FORMS.

Stability/Shelf LifeRapidly becomes yellow on exposure to air and assumes an oxide film.
Other Experimental Properties · 5 Einträge

Natural strontium is a mixture of four isotopes; 32 other unstable isotopes are known to exist. Three allotropic forms exist, with transition points at 235 and 540 °C.

Alkaline earth metal; valence of 2; 4 stable isotopes with atomic weights of: 88 (82.56%), 86 (9.86%), 87 (7.02%), 84 (0.56%); heated metal combines with hydrogen to form strontium hydride and with nitrogen to form strontium nitride.

Decomposes water on contact /Reacts with water to evolve hydrogen/

Standard enthalpy of formation at 298.15 K, 0.0 kJ/mol (crystal); entropy at 298.15 K, 55 J/mol-K (crystal); Heat capacity, 26.8 J/mol-K (crystal). Standard enthalpy of formation at 298.15 K,164.4 kJ/mol (gas phase); Gibbs free energy of formation, 130.9 kJ/mol (gas phase); entropy at 298.15 K, 164.6 J/mol-K (gas phase); Heat capacity 20.8 J/mol-K (gas phase).

For more Other Experimental Properties (Complete) data for STRONTIUM, ELEMENTAL (6 total), please visit the HSDB record page.

· 2 Einträge

Strontium is a naturally occurring element found in rocks, soil, dust, coal, and oil. Naturally occurring strontium is not radioactive and is either referred to as stable strontium or strontium. Strontium in the environment exists in four stable isotopes,84Sr (read as strontium eighty-four),86Sr,87Sr,88Sr. Strontium compounds are used in making ceramics and glass products, pyrotechnics, paint pigments, fluorescent lights, and medicines. Strontium can also exist as several radioactive isotopes; the most common is90Sr.90Sr is formed in nuclear reactors or during the explosion of nuclear weapons. Radioactive strontium generates beta particles as it decays. One of the radioactive properties of strontium is half-life, or the time it takes for half of the isotope to give off its radiation and change into another substance. The half-life of90Sr is 29 years.

There are about 140 mg of strontium in the body of an average human male; Daily intake is about 2 mg with about 60-90% obtained from food and the remaining from water; [HSDB] Natural strontium is not radioactive and not harmful by skin contact or inhalation. Animal studies show that high oral doses of strontium can weaken bones, especially in growing animals with diets deficient in calcium. Strontium-90 is formed in nuclear reactors and in explosions of nuclear bombs. Strontium-90 gives off beta particles with a half-life of 29 years. It has some medical applications, but is mainly considered a waste product. Strontium-90 is taken up by the bone where it emits beta radiation. It can cause bone marrow suppression and cancer. [ATSDR PHS] Median strontium levels (personal air sampling) in six art glass factories in Italy were 0.5 ug/m3 for oven chargers and batch mixers and 0.1 ug/m3 for art glass makers and formers. [Reference #2] See Strontium-90.

Chemical DangersReacts with water. This produces flammable/explosive gas (hydrogen - see ICSC 0001).
Hazard Classes and Categories · 2 Einträge

Water-react. 1 (80.6%)

Pyrophoric solids - Category 1

State Drinking Water Guidelines · 2 Einträge

(FL) FLORIDA 4,200 ug/L

(ME) MAINE 4200 ug/L

Federal Drinking Water GuidelinesEPA 4000 ug/L
Explosive Limits and PotentialPowdered metallic strontium may constitute an ... explosion hazard when exposed to flame ...
Hazardous Reactivities and Incompatibilities · 5 Einträge

Powdered metallic strontium may constitute a fire and explosion hazard due to the fact that strontium reacts with water to evolve hydrogen; there is the hazard of a gas explosion when the metal is stored in presence of moisture.

Reacts with ... alcohol, acetoacetic acid and aniline to form hydrogen.

Reaction with halogens may lead to ignition. Vigorous reaction on contact with oxidizing materials.

The heated metal combines with hydrogen to form strontium hydride and with nitrogen to form strontium nitride.

Undergoes reactions characteristic of alkaline earth metals. Strong reducing agent.

Sicherheit und Schutzausrüstung

Fire FightingNO water. Use dry sand, special powder.
First Aid Measures · 3 Einträge

Fresh air, rest.

Rinse skin with plenty of water or shower.

Rinse mouth.

Safe StorageDry. Keep under inert gas. Well closed. Keep in a well-ventilated room. Store in an area without drain or sewer access.
Storage Conditions · 4 Einträge

It should be kept under kerosene to prevent oxidation.

Metallic strontium ... should be stored in a cool, well ventilated place, away from organic and other easily oxidizable material.

... Store under naphtha.

Protect containers against physical damage. Store under liquid containing no oxygen.

Disposal Methods · 2 Einträge

SRP: The most favorable course of action is to use an alternative chemical product with less inherent propensity for occupational exposure or environmental contamination. 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 soil or water; effects on animal, aquatic, and plant life; and conformance with environmental and public health regulations.

Dissolve in a minimum amount of 6 molar hydrochloric acid and filter. Add filtrate to slight amount of 6 molar ammonium hydroxide by use of the litmus test. Precipitate with sufficient sodium carbonate. After filtration, wash and dry the ppt.

Spillage DisposalPersonal protection: particulate filter respirator adapted to the airborne concentration of the substance. Do NOT let this chemical enter the environment. Sweep spilled substance into covered sealable containers.
Preventive Measures · 2 Einträge

Processing of strontium should be carried out in enclosed plant and suitable ventilation and thermal insulation should be provided in working premises.

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.

Eye PreventionWear safety spectacles.
Fire PreventionNO contact with water.
Inhalation RiskA nuisance-causing concentration of airborne particles can be reached quickly when dispersed.
Skin PreventionProtective gloves.
Exposure PreventionPREVENT DISPERSION OF DUST!

Toxikologische Informationen

Toxicological InformationCDC-ATSDR Toxicological Profile
Target Organs · 2 Einträge

Developmental (effects while organs are developing), Hematological (Blood Forming), Musculoskeletal (Muscles and Skeleton)

Musculoskeletal

Exposure RoutesThe substance can be absorbed into the body by inhalation of its aerosol.
ICSC Environmental DataBioaccumulation of this chemical may occur along the food chain.
EPA IRIS Information · 3 Einträge

Strontium

Musculoskeletal

6 x 10 ^-1 mg/kg-day

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 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/

RAIS Toxicity Values · 6 Einträge

0.6

IRIS Current

2

ATSDR Final

2

ATSDR Final

USGS Health-Based Screening Levels for Evaluating Water-Quality · 5 Einträge

Strontium

01080

Trace element

4000

Smith, C.D. and Nowell, L.H., 2024. Health-Based Screening Levels for evaluating water-quality data (3rd ed.). DOI:10.5066/F71C1TWP

Hazard Quotient Level 0.1 or Cancer Risk Level 1E-06 · 6 Einträge

4.70e+04

7.00e+05

1.20e+04

4.00e+03

4.20e+02

6.00e-01

Hazard Quotient Level 3 or Cancer Risk Level 1E-04 · 6 Einträge

1.40e+05

2.10e+06

3.60e+04

4.00e+03

6.00e-01

Volatile

Regulatorische Informationen

State Drinking Water Guidelines · 2 Einträge

(FL) FLORIDA 4,200 ug/L

(ME) MAINE 4200 ug/L

Federal Drinking Water GuidelinesEPA 4000 ug/L
General Manufacturing Information · 5 Einträge

Primary Metal Manufacturing

Strontium: ACTIVE

It is obtained in a state of 99.6% purity by thermit process, followed by re-distillation at 1000 °C ...

Purity of strontium production is based on the purity of the oxide /used to produce the strontium/

No strontium minerals have been produced in the US since 1959.