Lithiumtetrahydroborat

Bezeichnung:Lithiumtetrahydroborat

CAS-Nr16949-15-8

Englisch Name:Lithium borohydride

CBNumberCB8732729

SummenformelBH4Li

Molgewicht21.78

MOL-Datei16949-15-8.mol

Synonyma

Lithiumtetrahydroborat

Lithiumtetrahydroborat physikalisch-chemischer Eigenschaften

Schmelzpunkt	280 °C
Siedepunkt	66°C/760mmHg
Dichte	0.896 g/mL at 25 °C
Flammpunkt	−1 °F
storage temp.	water-free area
Löslichkeit	Soluble in ether, THF, and aliphatic aminesSoluble in ether, tetrahydrofuran, aliphatic amines and ethanol.
Aggregatzustand	Powder
Farbe	White
Wichte	0.66
Explosionsgrenze	4.00-75.60%(V)
Wasserlöslichkeit	soluble H2O above pH 7, ether, tetrahydrofuran, aliphatic amines [MER06]
Sensitive	Air & Moisture Sensitive
Merck	14,5525
CAS Datenbank	16949-15-8(CAS DataBase Reference)
NIST chemische Informationen	Lithium tetrahydroborate(16949-15-8)
EPA chemische Informationen	Borate(1-), tetrahydro-, lithium (16949-15-8)

Sicherheit

Kennzeichnung gefährlicher	F,T,C,Xn,F+
R-Sätze:	14/15-23/24/25-34-20/21/22-11-40-36/37/38-19-67-66-22-12
S-Sätze:	26-36/37/39-43-45-36/37-16
RIDADR	UN 3399 4.3/PG 1
WGK Germany	2
RTECS-Nr.	ED2725000
F	10-21
TSCA	Yes
HS Code	2850 00 20
HazardClass	4.3
PackingGroup	I

Gefahreninformationscode (GHS)

Lithium borohydride Chemische Eigenschaften,Einsatz,Produktion Methoden

R-Sätze Betriebsanweisung:
R14/15:Reagiert heftig mit Wasser unter Bildung hochentzündlicher Gase.
R23/24/25:Giftig beim Einatmen, Verschlucken und Berührung mit der Haut.
R34:Verursacht Verätzungen.
R20/21/22:Gesundheitsschädlich beim Einatmen,Verschlucken und Berührung mit der Haut.
R11:Leichtentzündlich.
S-Sätze Betriebsanweisung:
S26:Bei Berührung mit den Augen sofort gründlich mit Wasser abspülen und Arzt konsultieren.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S43:Zum Löschen . . . (vom Hersteller anzugeben) verwenden (wenn Wasser die Gefahr erhöht, anfügen: "Kein Wasser verwenden").
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn möglich, dieses Etikett vorzeigen).
Chemische Eigenschaften
WHITE POWDER
Physikalische Eigenschaften
White orthorhombic crystals; density 0.67 g/cm³; decomposes in moist air; melts at 268°C; decomposes at 380°C; reacts with water; dissolves in ether, tetrahydrofuran, and diethylamine; solubility in ether, 25g/L at 25°C.
Verwenden
Lithium borohydride (LiBH₄) is a complex hydride with a high hydrogen density. It is a strong reducing agent and an electrode material. It has a high gravimetric (18.4 wt%) and volumetric (121 kg/m³) hydrogen storage capacities. It can also be used in lithium-ion batteries.
Verwenden
Strong reducing agent. Used to reduce compounds containing ketones, aldehydes, ester carbonyls, acid chlorides, lactones, and epoxidesLithium borohydride is a versatile reducing agent for aldehydes, ketones, nitriles, primary amides, acid chlorides, lactones, epoxides, and esters. It is involved in the preparation of intercalation compounds and nanocomposites. It is used as a precursor for other borohydrides and acts as a catalyst in hydroboration reactions. It is known to be good reversible storage compound for anhydrous ammonia and hydrogen.
Verwenden
Strong reducing agent. Used in the reduction of Compounds contg ketonic, aldehydic, or ester carbonyls and a nitrile group, where reduction of the carbonyl, but not of the nitrile group, is wanted. In the determination of free carboxyl groups in peptides and proteins; after esterification and acetylation, only the ester groups, and none of the peptide bonds are reduced.
Allgemeine Beschreibung
A white to grayish crystalline powder.
Air & Water Reaktionen
Likely to ignite when moistened with water [Lab. Gov. Chemist 1965].
Reaktivität anzeigen
Lithium borohydride is a strong reducing agent. Is easily ignited and burns vigorously once ignited. Reacts on contact with water or acids to form hydrogen gas and corrosive products. Reaction with limited amounts of water or moisture may cause ignition after a delay [Gaylord, 1965, p. 22].
Health Hazard
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 may cause pollution.
Brandgefahr
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.
Sicherheitsprofil
Poison by ingestion, inhalation, and skin contact. Flammable; can liberate H2. Incompatible with H20 as moisture on fibers of cellulose or as liquid. See also LITHIUM, BORON COMPOUNDS, and HYDRIDES.
läuterung methode
It is crystallised from Et2O, and pumped free of ether at 90-100o during 2hours [Schaeffer et al. J Am Chem Soc 78 729 1956]. Store it dry as it decomposes slowly in moist air. [Becher in Handbook of Preparative Inorganic Chemistry (Ed. Brauer) Academic Press Vol I p 775 1963.]

Lithium borohydride Upstream-Materialien And Downstream Produkte

16949-15-8, Lithium borohydride Verwandte Suche:

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