Decaboran Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSE BIS WEISSE KRISTALLE MIT STECHENDEM GERUCH.
PHYSIKALISCHE GEFAHREN
Staubexplosion der pulverisierten oder granulierten Substanz in Gemischen mit Luft m?glich.
ARBEITSPLATZGRENZWERTE
TLV: 0,05 ppm (als TWA), 0,15 ppm (als STEL); Hautresorption; (ACGIH 2005).
MAK: 0,05 ppm, 0,25 mg/m? Spitzenbegrenzung: überschreitungsfaktor II(2); Hautresorption; (DFG 2005).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation des Aerosols, über die Haut und durch Verschlucken.
INHALATIONSGEFAHREN
Beim Verdampfen bei 20°C kann schnell eine gesundheitssch?dliche Kontamination der Luft eintreten.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Das Aerosol reizt die Augen, die Haut und die Atemwege. M?glich sind Auswirkungen auf das Zentralnervensystem mit nachfolgender Müdigkeit, übererregbarkeit und Narkose. Die Auswirkungen treten u.U. verz?gert ein. ?rztliche Beobachtung notwendig.
WIRKUNGEN NACH WIEDERHOLTER ODER LANGZEITEXPOSITION
M?glich sind Auswirkungen auf das Zentralnervensystem mit nachfolgender Müdigkeit, Konzentrations- und lKoordinationsmangel.
LECKAGE
Verschüttetes Material in Beh?ltern sammeln; falls erforderlich durch Anfeuchten Staubentwicklung verhindern. Reste sorgf?ltig sammeln. An sicheren Ort bringen. Pers?nliche Schutzausrüstung: Vollschutzanzug mit umgebungsluftunabh?ngigem Atemschutzger?t.
R-S?tze Betriebsanweisung:
R5:Beim Erw?rmen explosionsf?hig.
R24/25:Giftig bei Berührung mit der Haut und beim Verschlucken.
R26:Sehr giftig beim Einatmen.
R36/37/38:Reizt die Augen, die Atmungsorgane und die Haut.
R11:Leichtentzündlich.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S27:Beschmutzte, getr?nkte Kleidung sofort ausziehen.
S36/37/39:Bei der Arbeit geeignete Schutzkleidung,Schutzhandschuhe und Schutzbrille/Gesichtsschutz tragen.
S45:Bei Unfall oder Unwohlsein sofort Arzt zuziehen (wenn m?glich, dieses Etikett vorzeigen).
Chemische Eigenschaften
Decaborane is a colorless solid with a bitter
odor. The Odor Threshold is 0.06 ppm.
Verwenden
Decaborane is used as a catalyst in the polymerization of
olefins.
Allgemeine Beschreibung
White crystals or colorless crystalline needles with an intense, bitter, chocolate-like odor. Used in rocket propellants, as a catalyst in olefin polymerization, as a rubber vulcanizer, to coat metals with corrosion resistant boron, in manufacture of plastics, as an oxygen scavenger; in mothproofing, in dye-stripping, as a reducing and fluxing agent, as a stabilizer and rayon delustrant.
Air & Water Reaktionen
Highly flammable. DECABORANE may spontaneously ignite upon exposure to air. Slightly soluble in cold water [Merck].
Reaktivit?t anzeigen
DECABORANE forms impact-sensitive mixtures with halocarbons (carbon tetrachloride) or with ethers (dioxane). DECABORANE ignites in oxygen at 100° C. When heated to decomposition DECABORANE emits toxic fumes of boron oxides [Hawthorne, M. F., Inorg. Synth., 1967, 10, p. 93]. DECABORANE may form an explosive mixture with dimethyl sulfoxide [Shriver, 1969, p. 209]. DECABORANE reacts with amides, acetone, butyraldehyde, and acetonitrile at room temperature [Merck].
Health Hazard
Decaborane is a highly toxic compoundby all routes of administration. Its toxicityis somewhat greater than that of diborane.The acute toxic symptoms in humans frominhalation of its vapors could be headache,nausea, vomiting, dizziness, and lightheadedness.In severe poisoning, muscle spasmand convulsion may occur. Symptoms of toxicitymay appear 1 or 2 days after exposure,and the recovery is slow. An LC50value for mice from a 40- hour exposure was12 ppm.
Ingestion can cause spasm, tremor, andconvulsion. It can be absorbed through theskin, producing drowsiness and loss of coordination.Toxic effects from skin absorption,however, are relatively moderate.
LD
50 value, oral (mice): 41 mg/kg
LD
50 value, skin (rats): 740 mg/kg
.
Brandgefahr
DECABORANE mixed with carbon tetrachloride is dangerously shock sensitive. DECABORANE reacts slowly with air but when mixed with air or oxygen, DECABORANE becomes highly flammable and may explode. DECABORANE undergoes an explosive reaction with most oxidizing agents including halogenated hydrocarbons. DECABORANE may give off toxic fumes of unburned material. When heated to decomposition, DECABORANE emits toxic fumes of boron oxides. Incompatible with ethers; halocarbons; oxygen at 212F; dimethyl sulfoxide, most oxidizing agents, including halogenated hydrocarbons. DECABORANE is corrosive to natural rubber, some synthetic rubbers, some greases, and some lubricants. Normally stable, but becomes unstable at elevated temperature and pressure. Hazardous polymerization may not occur.
Sicherheitsprofil
Poison by inhalation,
ingestion, sktn contact, and intraperitoneal
routes. Ignites in O2 at 100°C. Forms
impact-sensitive explosive mixtures with
ethers (e.g., dioxane) and halocarbons (e.g.,
carbon tetrachloride). Incompatible with
dimethyl sulfoxide. When heated to
decomposition it emits toxic fumes of boron
oxides. See also BORON COMPOUNDS
and BORANES.
m?gliche Exposition
Decaborane is used as a catalyst in
olefin polymerization; in rocket propellants; in gasoline
additives and as a vulcanizing agent for rubber.
Versand/Shipping
UN1868 Decaborane, Hazard Class: 4.1; Labels:
4.1-Flammable solid, 6.1-Poisonous materials
l?uterung methode
Purify decaborane by vacuum sublimation at 80o/0.1mm, followed by crystallisation from methylcyclohexane, CH2Cl2, or dry olefin-free-n-pentane, the solvent being subsequently removed by storing the crystals in a vacuum desiccator containing CaCl2. It is soluble in H2O but is slowly decomposed to give H2. It is soluble in alkali, and on acidification it liberates H2. TOXIC. [Greenwood in Comprehensive Chemistry (Ed Bailar et al.) Pergamon Press Vol 1 pp 818-837 1973.]
Inkompatibilit?ten
May ignite spontaneously on exposure
to air. Decomposes slowly in hot water. Incompatible
with oxidizers (chlorates, nitrates, peroxides, permanga-
nates, perchlorates, chlorine, bromine, fluorine, etc.); con-
tact may cause fires or explosions. Keep away from
alkaline materials, strong bases, strong acids, oxoacids,
epoxides, and oxygenated solvents; dimethyl sulfoxide
(reaction may be violent), oxygen @ .100
C). Carbon
tetrachloride, ethers, halocarbons, halogenated com-
pounds form shock-sensitive mixtures. Attacks some plas-
tics, rubber, and coatings.
Waste disposal
Incineration with aqueous
scrubbing of exhaust gases to remove B2O3 particulates.
Decaboran Upstream-Materialien And Downstream Produkte
Upstream-Materialien
Downstream Produkte
