Decaborane

  • Decaboron tetradecahydride
  • Boron hydride
Formula
B10H14
Structure
Description
White crystals or colorless crystalline needles with an intense, bitter, chocolate-like odor.
Uses
In rocket propellants, as catalyst in olefin polymerization.

Registry Numbers and Inventories.
CAS
17702-41-9
EC (EINECS/ELINCS)
241-711-8
RTECS
HD1400000
RTECS class
Other
UN (DOT)
1868
Merck
12,2902
Beilstein/Gmelin
28154 (G)
Swiss Giftliste 1
G-1473
Canada DSL/NDSL
NDSL
US TSCA
Listed
Korea ECL
Listed

Properties.
Formula
B10H14
Formula mass
122.22
Melting point, °C
98 - 99
Boiling point, °C
213
Vapor pressure, mmHg
0.05 (25 C)
Vapor density (air=1)
4.2
Odor Threshold Odor threshold 0.35 ppm
Density
2.822 g/cm3
Solubility in water
Slightly soluble
Heat of vaporization
48.5 kJ/mol
Heat of combustion
-8148 kJ/mol

Hazards and Protection.
Storage
Keep away from sources of ignition. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
Handling
Use spark-proof tools and explosion proof equipment. Do not breathe dust, vapor, mist, or gas. Do not get in eyes, on skin, or on clothing. Use only in a chemical fume hood.
Protection
Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear appropriate protective clothing to prevent skin exposure.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Vacuum or sweep up material and place into a suitable disposal container. Remove all sources of ignition. Use a spark-proof tool.
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents, carbon disulfide, carbontetrachloride, oxygen, halogenated agents, amides (e.g. butyramide, diethyltoluamide, dimethyl formamide), acetone.
Decomposition
Hydrogen gas, boron oxides.

Fire.
Flash Point,°C
80
Autoignition, °C
149
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Reacts with water to form explosive hydrogen gas. Flammable solid. May explode when heated. Extinguishing media: Use carbon dioxide or dry chemical.
Fire potential
Moderately flammable. Combustion with moderate heating.
Hazards
Decaborane mixed with carbon tetrachloride is dangerously shock sensitive. It reacts slowly with air but when mixed with air or oxygen, it becomes highly flammable and may explode. It undergoes an explosive reaction with most oxidizing agents including halogenated hydrocarbons. It may give off toxic fumes of unburned material. When heated to decomposition, it emits toxic fumes of boron oxides. Incompatible with ethers; halocarbons; oxygen at 212F; dimethyl sulfoxide, most oxidizing agents, including halogenated hydrocarbons. It is corrosive to natural rubber, some synthetic rubbers, some greases, and some lubricants. Normally stable, but becomes unstable at elevated temperature and pressure.
Combustion products
Toxic gases and vapors (such as boron oxide smoke) may be released in a fire involving decaborane.
Health
3
 
Flammability
2
 
 
Reactivity
2
 
 
Special
W

Health.
Exposure limit(s)
OSHA PEL: TWA 0.3 mg/m3 (0.05 ppm) skin NIOSH REL: TWA 0.3 mg/m3 (0.05 ppm) ST 0.9 mg/m3 (0.15 ppm) skin NIOSH IDLH: 15 mg/m3
Poison_Class
2
Exposure effects
Cough, wheezing, rapid breathing, mild elevated blood pressure, or fever may be noted after exposure to the boron hydrides, but decaborane is generally less active than diborane for effects on respiration. Dizziness, weakness, CNS depression and excitation, hallucinations, and incoordination have been seen. Mental deficits have been produced by acute exposures. Gross tremors, hypoglossal spasms, and unusual positioning of the hands have been seen in decaborane intoxication. Seizures have occurred in experimental animals. Pentaborane is more active for neurological effects than diborane. No data were found for possible effects on teratogenesis, pregnancy, or lactation.
   Ingestion
Poison by ingestion.
   Inhalation
May be fatal if inhaled. May cause nausea, dizziness, and headache.
   Skin
Toxic in contact with skin.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
Get medical aid immediately. Wash mouth out with water.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Get medical aid immediately. Immediately flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
UN number
1868
Response guide
Hazard class
4.1
Packing Group
II
 
USCG CHRIS Code
DBR
 
Std. Transport #
4916715