17702-41-9 Usage
Chemical Properties
Different sources of media describe the Chemical Properties of 17702-41-9 differently. You can refer to the following data:
1. white powder
2. Decaborane is a colorless solid with a bitter
odor. The Odor Threshold is 0.06 ppm.
Uses
Different sources of media describe the Uses of 17702-41-9 differently. You can refer to the following data:
1. It is used in rocket propellants and as acatalyst in olefin polymerization.
2. Decaborane is used as a catalyst in the polymerization of
olefins.
3. In rocket propellants, and as a catalyst in olefin polymerization Boron source for ion-implantation processes.
4. In rocket propellants; as catalyst in olefin polymerization.
General Description
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 Reactions
Highly flammable. DECABORANE may spontaneously ignite upon exposure to air. Slightly soluble in cold water [Merck].
Reactivity Profile
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
Different sources of media describe the Health Hazard of 17702-41-9 differently. You can refer to the following data:
1. May cause death or permanent injury after very short exposure to small quantities. Produces marked irritation of skin and mucous membranes. May cause liver injury.
2. 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. LD50 value, oral (mice): 41 mg/kg LD50 value, skin (rats): 740 mg/kg .
Fire Hazard
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.
Safety Profile
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.
Potential Exposure
Decaborane is used as a catalyst in
olefin polymerization; in rocket propellants; in gasoline
additives and as a vulcanizing agent for rubber.
Shipping
UN1868 Decaborane, Hazard Class: 4.1; Labels:
4.1-Flammable solid, 6.1-Poisonous materials
Purification Methods
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.]
Incompatibilities
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.
Check Digit Verification of cas no
The CAS Registry Mumber 17702-41-9 includes 8 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 5 digits, 1,7,7,0 and 2 respectively; the second part has 2 digits, 4 and 1 respectively.
Calculate Digit Verification of CAS Registry Number 17702-41:
(7*1)+(6*7)+(5*7)+(4*0)+(3*2)+(2*4)+(1*1)=99
99 % 10 = 9
So 17702-41-9 is a valid CAS Registry Number.
InChI:InChI=1/B10H12/c1-3-5-7-9-10-8-6-4-2/h3-10H,1-2H2
17702-41-9Relevant articles and documents
Leach, John B.,Toft, Mark A.,Himpsl, Francis L.,Shore, Sheldon G.
, p. 988 - 989 (1981)
Synthesis of Decaborane by the Reaction of Sodium Undecaborate with Mild Organic Oxidants
Belov,Storozhenko,Voloshina,Kuznetsova
, p. 1804 - 1809 (2017)
New organic oxidants (aldehydes and ketones) allowing efficient synthesis of decaborane in a high yield via intermediate alkali metal salt were found. The sodium undecaborate oxidation process was refined, and new reaction stoichiometry was suggested.
Improved synthetic route to n-B18H22
Li, Yuqi,Sneddon, Larry G.
, p. 470 - 471 (2006)
Simple iodine oxidation of the B9H12- anion in toluene at room temperature reliably gives excellent yields (～80%) of n-B18H22 (anti-B18H22) and thus provides a convenient, large-scale, safe route to this important polyborane cluster.
Kinetic studies of reactions of hexaborane(10) with other binary boranes in the gas phase
Attwood, Martin D.,Greatrex, Robert,Greenwood, Norman N.,Potter, Christopher D.
, p. 144 - 152 (2007/10/03)
Cothermolysis reactions of B6H10 with the binary boranes B2H6, B4H10, B5H9, and B5H11 have been studied by a quantitative mass-spectrometric technique to gain insight into the role of B6H10 in borane interconversion reactions. Except in the B6H10-B5H9 system the initial rate of consumption of B6H10 was found to be considerably more rapid than in the thermolysis of B6H10 alone, indicating that interactions were occuring. Detailed kinetic studies of the B6H10-B2H6 and B6H10-B4H10 reactions showed that the rate of consumption of B6H10 was governed in each case by the rate-determining step in the decomposition of the co-reactant, the orders being 3/2 with respect to B2H6 and 1 with respect to B4H10; a considerable increase in the conversion of B6H10 to B10H14 at the expense of polymeric solids was also observed. Added hydrogen was found to have very little effect on the reaction rates and product distributions in the cothermolysis reactions, in marked contrast to its effect on the reactions of B2H6 and B4H10 alone. The kinetic results are entirely consistent with earlier suggestion, based on qualitative observations, that the reactive intermediates {B3H7} and {B4H8} are scavenged by reactions with B6H10, and suggest strongly that this borane, unlike B6H12, plays a pivotal role in the build-up to B10H14 and other higher boranes.
A Kinetic Study of the Gas-phase Thermolysis of Pentaborane(11)
Attwood, Martin D.,Greatrex, Robert,Greenwood, Norman N.
, p. 385 - 390 (2007/10/02)
The kinetics of thermal decomposition of pentaborane(11) have been investigated by a mass-spectrometric technique in the pressure range 1.75-10.50 mmHg and temperature range 40-150 deg C.In conditioned Pyrex vessels the reaction was shown to occur by a homogeneous gas-phase process according to the first-order initial-rate low -d/dt=1.3*107 exp(-72600/RT).The main volatile products are H2 and B2H6, the latter appearing at the rate of ca. 0.5 mol per mol of B5H11 consumed.Pentaborane (9) is also produced, at less than half the rate of B2H6, together with even smaller amounts of hexaboranes and B10H14, and traces of B4H10; some 40-45percent of the boron is converted into involatile solid hydride BHx, where x varies from ca. 2.0 at 40 deg C to ca. 1.1 at 150 deg C.No obvious dependence on temperature was detected in the overall distribution of boron between volatiles and solid, but the production of B5H9 was favoured at higher temperatures.Mechanistic implications of these results are discussed.
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