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Aluminiumtrihydrid
alane · ALMINUMHYDRIDE · Aluminium hydride · Trihydridealuminum · Aluminum trihydride · aluminium trihydride · alpha-aluminum trihydride · aluMinuM hydride, alane, AlH3
Identifikatoren & physikalische Daten
| CAS No. | 7784-21-6 |
|---|---|
| Summenformel | AlH3 |
| Durchschnittliche Molmasse | 30,005 g/mol |
| Monoisotopische Masse | 30,0050135 g/mol |
| SMILES | [AlH3] |
| InChIKey | AZDRQVAHHNSJOQ-UHFFFAOYSA-N |
| PubChem CID | 14488 |
| ChEBI | CHEBI:30136 |
| EC No. | 232-053-2 |
| DTXSID | DTXSID80895037 |
| Lokaler Name | Aluminiumtrihydrid |
Chemische & physikalische Eigenschaften
| Polarare Oberfläche (TPSA) | 0 |
|---|---|
| H-Brücken-Donoren | 0 |
| H-Brücken-Akzeptoren | 0 |
| Frei drehbare Bindungen | 0 |
| Schwere Atome | 1 |
| Formalladung | 0 |
| Komplexität | 0 |
| Physical Description | Aluminum hydride appears as a colorless to white solid.Colorless solid[Merck Index] Colorless or white solid[CAMEO] |
| Schmelzpunkt | decomposes at 160℃ [HAW93] |
| Dichte | 1.45 |
| Löslichkeit | reacts with H2Oevolves H2 in H2O [HAW93] |
| Aggregatzustand | colorless hexagonal crystals |
| Farbe | colorless hexagonal, hexane crystals, crystalline |
| Spezifische Wärmekapazität | Cp(crystal): 1.34 J/(g·K), at 25℃ |
| CAS Datenbank | 7784-21-6 |
| EPA chemische Informationen | Aluminum trihydride (7784-21-6) |
Sicherheit & Vorschriften
| GHS-Einstufung | DangerH260 (100%): In contact with water releases flammable gases which may ignite spontaneously [Danger Substances and mixtures which in contact with water, emit flammable gases]H314 (100%): Causes severe skin burns and eye damage [Danger Skin corrosion/irritation]H318 (49.3%): Causes serious eye damage [Danger Serious eye damage/eye irritation]H335 (49.3%): May cause respiratory irritation [Warning Specific target organ toxicity, single exposureRespiratory tract irritation]P223, P231+P232, P260, P261, P264, P264+P265, P271, P280, P301+P330+P331, P302+P335+P334, P302+P361+P354, P304+P340, P305+P354+P338, P316, P317, P319, P321, P363, P370+P378, P402+P404, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 75 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.Information may vary between notifications depending on impurities, additives, and other factors. The percentage value in parenthesis indicates the notified classification ratio from companies that provide hazard codes. Only hazard codes with percentage values above 10% are shown. For more detailed information, please visit ECHA C&L website. |
|---|---|
| Regulatorische Informationen | 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-Kennzeichnung | Dangerous When Wet |
| Brandgefahren | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:Produce flammable gases on contact with water. May ignite on contact with water or moist air. Some react vigorously or explosively on contact with water. May be ignited by heat, sparks or flames. May re-ignite after fire is extinguished. Some are transported in highly flammable liquids. Runoff may create fire or explosion hazard. (ERG, 2024)· Produce flammable gases on contact with water.· May ignite on contact with water or moist air.· Some react vigorously or explosively on contact with water.· May be ignited by heat, sparks or flames.· May re-ignite after fire is extinguished.· Some are transported in highly flammable liquids.· Runoff may create fire or explosion hazard. |
| Gesundheitsgefahren | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death. May produce corrosive solutions on contact with water. Fire will produce irritating, corrosive and/or toxic gases. Runoff from fire control or dilution water may cause environmental contamination. (ERG, 2024)· Inhalation or contact with vapors, substance or decomposition products may cause severe injury or death.· May produce corrosive solutions on contact with water.· Fire will produce irritating, corrosive and/or toxic gases.· Runoff from fire control or dilution water may cause environmental contamination. |
| Gefahrenübersicht | A weak and selective reducing agent[Merck Index] A strong reducing agent that reacts with water and airHydrolyzed explosively in water evolving hydrogen gasMay spontaneously and violently decompose at ambient temperatures[CAMEO] Causes CNS effects and changes in lungs after intratracheal lethal-dose studies of rats[RTECS] Reacts with water forming flammable gases that may spontaneously igniteCauses burnsInhalation may cause corrosive injuries to upper respiratory tract and lungs[Aldrich MSDS] |
| DOT-Nummer und Handbuch | 2463 138 |
| Reaktive Gruppe | Metal Hydrides, Metal Alkyls, Metal Aryls, and Silanes |
| Reactivity Alerts | Strong Reducing AgentWater-ReactivePyrophoric |
| Reactivity Profile | ALUMINUM HYDRIDE is a powerful reducing agent. May react violently with oxidizers. Prolonged exposure to heat may cause spontaneous decomposition. Can also decompose spontaneously at ambient temperature with explosive violence. Occasionally, explosions have occurred when it was stored in ether. The explosions have been blamed on the presence of carbon dioxide impurity in the ether [J. Amer. Chem. Soc. 70:877 1948]. Can emit toxic fumes on contact with acid or fumes from an acid. [Lewis]. At elevated temperatures, the hydride reduces carbon dioxide or sodium hydrogen carbonate to methane and ethane. These gases are the explosive products formed when CO2 extinguishers have been used during hydride fires. The 1:1 complexes of the hydride (as a complex with ether or dimethylamine) and various tetrazole derivatives are explosive. Tetrazoles include, 2-methyl, 2-ethyl, 5-ethyl, 2-methyl-5-vinyl, 5-amino-2-ethyl, etc., [US Pat. 3 396 170, 1968]. |
| DOT Hazard Classification | Aluminum hydrideUN2463Div 4.3 Dangerous when wet material (49 eCFR § 173.124)PG I: the degree of danger presented by the material is greatFor more information about the packing group assignment, please visit 49 eCFR § 173 |
| Air and Water Reactions | Ignites in moist air. Ignites in air with or without oxygen enrichment [Bretherick 1979 p. 221]. Explosively hydrolyzed by water (forms hydrogen gas) [Ruff J.K. Inorg. Synth 1967, 9, 34]. |
| Hazard Classes and Categories | Water-react. 1 (100%)Skin Corr. 1B (100%)Eye Dam. 1 (49.3%)STOT SE 3 (49.3%)Flammable agents - 3rd degree, Reactive agents - 2nd degree |
| Brandbekämpfung | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:DO NOT USE WATER OR FOAM.SMALL FIRE: Dry chemical, soda ash, lime or sand.LARGE FIRE: DRY sand, dry chemical, soda ash or lime or withdraw from area and let fire burn. If it can be done safely, move undamaged containers away from the area around the fire.FIRE INVOLVING METALS OR POWDERS (ALUMINUM, LITHIUM, MAGNESIUM, ETC.): Use dry chemical, DRY sand, sodium chloride powder, graphite powder or class D extinguishersin addition, for Lithium you may use Lith-X® powder or copper powder. Also, see ERG Guide 170.FIRE INVOLVING TANKS, RAIL TANK CARS OR HIGHWAY TANKS: Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles. Do not get water inside containers. Cool containers with flooding quantities of water until well after fire is out. Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank. ALWAYS stay away from tanks in direct contact with flames. (ERG, 2024) |
| Freisetungsmaßnahmen | · CALL 911. Then call emergency response telephone number on shipping paper. If shipping paper not available or no answer, refer to appropriate telephone number listed on the inside back cover.· Keep unauthorized personnel away.· Stay upwind, uphill and/or upstream.· Ventilate closed spaces before entering, but only if properly trained and equipped.· ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area.· Do not touch or walk through spilled material.· Stop leak if you can do it without risk.· Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material.· DO NOT GET WATER on spilled substance or inside containers.Small Spill· Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain.· Dike for later disposaldo not apply water unless directed to do so.Powder Spill· Cover powder spill with plastic sheet or tarp to minimize spreading and keep powder dry.· DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF A SPECIALIST. |
| Erste Hilfe | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:Refer to the "General First Aid" section. Specific First Aid: In case of contact with substance, wipe from skin immediatelyflush skin or eyes with running water for at least 20 minutes. (ERG, 2024)General First Aid:· Call 911 or emergency medical service.· Ensure that medical personnel are aware of the material(s) involved, take precautions to protect themselves and avoid contamination.· Move victim to fresh air if it can be done safely.· Administer oxygen if breathing is difficult.· If victim is not breathing:-- DO NOT perform mouth-to-mouth resuscitationthe victim may have ingested or inhaled the substance.-- If equipped and pulse detected, wash face and mouth, then give artificial respiration using a proper respiratory medical device (bag-valve mask, pocket mask equipped with a one-way valve or other device).-- If no pulse detected or no respiratory medical device available, provide continuous compressions. Conduct a pulse check every two minutes or monitor for any signs of spontaneous respirations.· Remove and isolate contaminated clothing and shoes.· For minor skin contact, avoid spreading material on unaffected skin.· In case of contact with substance, remove immediately by flushing skin or eyes with running water for at least 20 minutes.· For severe burns, immediate medical attention is required.· Effects of exposure (inhalation, ingestion, or skin contact) to substance may be delayed.· Keep victim calm and warm.· Keep victim under observation.· For further assistance, contact your local Poison Control Center.· Note: Basic Life Support (BLS) and Advanced Life Support (ALS) should be done by trained professionals.Specific First Aid:· In case of contact with substance, wipe from skin immediatelyflush skin or eyes with running water for at least 20 minutes. |
| Expositionsschutz und Persönliche Schutzausrüstung | · Wear positive pressure self-contained breathing apparatus (SCBA).· Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE.· Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. |
| Freisetung ohne Brand | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:ELIMINATE all ignition sources (no smoking, flares, sparks or flames) from immediate area. Do not touch or walk through spilled material. Stop leak if you can do it without risk. Use water spray to reduce vapors or divert vapor cloud drift. Avoid allowing water runoff to contact spilled material. DO NOT GET WATER on spilled substance or inside containers.SMALL SPILL: Cover with DRY earth, DRY sand or other non-combustible material followed with plastic sheet to minimize spreading or contact with rain. Dike for later disposaldo not apply water unless directed to do so.POWDER SPILL: Cover powder spill with plastic sheet or tarp to minimize spreading and keep powder dry. DO NOT CLEAN-UP OR DISPOSE OF, EXCEPT UNDER SUPERVISION OF A SPECIALIST. (ERG, 2024) |
| Isolation and Evacuation | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:IMMEDIATE PRECAUTIONARY MEASURE: Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.LARGE SPILL: Consider initial downwind evacuation for at least 300 meters (1000 feet).FIRE: If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directionsalso, consider initial evacuation for 800 meters (1/2 mile) in all directions. (ERG, 2024)Immediate precautionary measure· Isolate spill or leak area in all directions for at least 50 meters (150 feet) for liquids and at least 25 meters (75 feet) for solids.· Consider initial downwind evacuation for at least 300 meters (1000 feet).· If tank, rail tank car or highway tank is involved in a fire, ISOLATE for 800 meters (1/2 mile) in all directionsalso, consider initial evacuation for 800 meters (1/2 mile) in all directions. |
| Minimum Risk Level | Intermediate Oral: 1.0 mg/kg/day (L134) Chronic Oral: 1.0 mg/kg/day (L134) |
| Personal Protective Equipment (PPE) | Excerpt from ERG Guide 138 [Substances - Water-Reactive (Emitting Flammable Gases)]:Wear positive pressure self-contained breathing apparatus (SCBA). Wear chemical protective clothing that is specifically recommended by the manufacturer when there is NO RISK OF FIRE. Structural firefighters' protective clothing provides thermal protection but only limited chemical protection. (ERG, 2024) |
| Emergency Response Planning Guidelines | · DO NOT USE WATER OR FOAM.Small Fire· Dry chemical, soda ash, lime or sand.Large Fire· DRY sand, dry chemical, soda ash or lime or withdraw from area and let fire burn.· If it can be done safely, move undamaged containers away from the area around the fire.Fire Involving Metals or Powders (Aluminum, Lithium, Magnesium, etc.)· Use dry chemical, DRY sand, sodium chloride powder, graphite powder or class D extinguishersin addition, for Lithium you may use Lith-X® powder or copper powder. Also, see GUIDE 170.Fire Involving Tanks, Rail Tank Cars or Highway Tanks· Fight fire from maximum distance or use unmanned master stream devices or monitor nozzles.· Do not get water inside containers.· Cool containers with flooding quantities of water until well after fire is out.· Withdraw immediately in case of rising sound from venting safety devices or discoloration of tank.· ALWAYS stay away from tanks in direct contact with flames. |
| Treatment | EYES: irrigate opened eyes for several minutes under running water. INGESTION: do not induce vomiting. Rinse mouth with water (never give anything by mouth to an unconscious person). Seek immediate medical advice. SKIN: should be treated immediately by rinsing the affected parts in cold running water for at least 15 minutes, followed by thorough washing with soap and water. If necessary, the person should shower and change contaminated clothing and shoes, and then must seek medical attention. INHALATION: supply fresh air. If required provide artificial respiration. |
| Gesundheitliche Auswirkungen | Aluminum targets the nervous system and causes decreased nervous system performance and is associated with altered function of the blood-brain barrier. The accumulation of aluminum in the body may cause bone or brain diseases. High levels of aluminum have been linked to Alzheimer's disease. A small percentage of people are allergic to aluminium and experience contact dermatitis, digestive disorders, vomiting or other symptoms upon contact or ingestion of products containing aluminium. (L739, L740) |
| Unerwünschte Wirkungen | Dermatotoxin - Skin burns.Toxic Pneumonitis - Inflammation of the lungs induced by inhalation of metal fumes or toxic gases and vapors. |
| Expositionspfade | Oral (L739)inhalation (L739) |
| Toxizitätsübersicht | The main target organs of aluminum are the central nervous system and bone. Aluminum binds with dietary phosphorus and impairs gastrointestinal absorption of phosphorus. The decreased phosphate body burden results in osteomalacia (softening of the bones due to defective bone mineralization) and rickets. Aluminum's neurotoxicity is believed to involve several mechanisms. Changes in cytoskeletal protein functions as a results of altered phosphorylation, proteolysis, transport, and synthesis are believed to be one cause. Aluminum may induce neurobehavioral effects by affecting permeability of the blood-brain barrier, cholinergic activity, signal transduction pathways, lipid peroxidation, and impair neuronal glutamate nitric oxide-cyclic GMP pathway, as well as interfere with metabolism of essential trace elements because of similar coordination chemistries and consequent competitive interactions. It has been suggested that aluminum's interaction with estrogen receptors increases the expression of estrogen-related genes and thereby contributes to the progression of breast cancer (A235), but studies have not been able to establish a clear link between aluminum and increased risk of breast cancer (A15468). Certain aluminum salts induce immune responses by activating inflammasomes. (L739, A235, A236) |
| Signs and Symptoms | Inhalating aluminum dust causes coughing and abnormal chest X-rays. A small percentage of people are allergic to aluminium and experience contact dermatitis, digestive disorders, vomiting or other symptoms upon contact or ingestion of products containing aluminium. (L739, L740) |
| Carcinogen Classification | Not listed by IARC. IARC classified aluminum production as carcinogenic to humans (Group 1), but did not implicate aluminum itself as a human carcinogen. (L135) A link between use of aluminum-containing antiperspirants and increased risk of breast cancer has been proposed (A235), but studies have not been able to establish a clear link (A15468). |
| TSCA-Inventar-Status | TSCA listed |
| UN-Transportnummer | UN 2463 |
| Gefahrenklasse | 4.3 |
| Verpackungsgruppe | I |
Anwendungen & Verwendung
Verwenden
As catalyst for polymerizations; reducing agent. Lithium aluminum hydride, q.v. is a more powerful reagent because of its greater soly.
Herstellung & Synthese
synthetische
Aluminum hydride is prepared by the reaction of lithium hydride with aluminum chloride in diethyl ether. 3LiH + AlCl3 → AlH3 + 3LiCl