| Identification | More | [Name]
2,2-DIMETHYLPROPANE | [CAS]
463-82-1 | [Synonyms]
2,2-DIMETHYLPROPANE
Neopentane
1,1,1-Trimethylethane
2,2-Dimethylpropan
2,2-dimethyl-propan
dimethylpropane
Neo-C5H12
Neopentan
propane,2,2-dimethyl-
tert-Pentane
Tetramethylcarbon
Tetramethylmethan
Tetramethylmethane
Dimethylpropanol
2,2-dimethylpropane neopentane | [EINECS(EC#)]
207-343-7 | [Molecular Formula]
C5H12 | [MDL Number]
MFCD00039840 | [Molecular Weight]
72.15 | [MOL File]
463-82-1.mol |
| Chemical Properties | Back Directory | [Appearance]
Colorless gas or very volatile liquid.Soluble in alcohol; insoluble in water. | [Melting point ]
-19.8° | [Boiling point ]
bp 9.5° | [density ]
d00 0.613 (liq) | [vapor pressure ]
1,074.43 at 19.492 °C, 1,267.75 at 24.560 °C (ebulliometry, Osborn and Douslin, 1974) | [refractive index ]
1.3390 | [solubility ]
Soluble in alcohol and ether (Weast, 1986). | [pka]
>14 (Schwarzenbach et al., 1993) | [Water Solubility ]
33.2 mg/kg at 25 °C (shake flask-GC, McAuliffe, 1966) | [Henry's Law Constant]
3.70(atm?m3/mol) at 25 °C (Mackay and Shiu, 1981) | [Dielectric constant]
1.9099999999999999 | [Exposure limits]
ACGIH TLV: TWA 600 ppm (adopted). | [Uses]
Research, butyl rubber. | [CAS DataBase Reference]
463-82-1(CAS DataBase Reference) | [EPA Substance Registry System]
2,2-Dimethylpropane (463-82-1) |
| Safety Data | Back Directory | [Hazard Codes ]
F+,N | [Risk Statements ]
R12:Extremely Flammable.
R51/53:Toxic to aquatic organisms, may cause long-term adverse effects in the aquatic environment . | [Safety Statements ]
S9:Keep container in a well-ventilated place .
S16:Keep away from sources of ignition-No smoking .
S33:Take precautionary measures against static discharges .
S61:Avoid release to the environment. Refer to special instructions safety data sheet . | [RIDADR ]
2044 | [HazardClass ]
2.1 | [HS Code ]
2901100000 | [Safety Profile]
Poison by intraperitoneal route. An inhalation hazard.
Both the gas and the liquid are flammable
when exposed to heat or flame; can react
vigorously with oxidlzing materials. When
heated to decomposition it emits acrid
smoke and irritating fumes. | [Hazardous Substances Data]
463-82-1(Hazardous Substances Data) | [Toxicity]
Acute oral LD50 (intraperitoneal) for mice 100 mg/kg (quoted, RTECS, 1985). |
| Hazard Information | Back Directory | [General Description]
Boiling point 40°F. May liquefy in cool or cold weather. Less dense than water. Flash point-85°F. Autoignition temperature 842°F. Insoluble in water but soluble in alcohol. Under prolonged exposure to fire or heat, the containers may rupture violently and rocket. | [Reactivity Profile]
2,2-DIMETHYLPROPANE(463-82-1) may be incompatible with strong oxidizing agents like nitric acid. Charring may occur followed by ignition of unreacted hydrocarbon and other nearby combustibles. In other settings, mostly unreactive. Not affected by aqueous solutions of acids, alkalis, most oxidizing agents, and most reducing agents. Burns exothermically if heated sufficiently or when ignited in the presence of air, oxygen or strong oxidizing agents to produce carbon dioxide and water. | [Air & Water Reactions]
Highly flammable. Insoluble in water. | [Hazard]
Highly flammable, dangerous fire risk,
explosive limits in air 1.4–7.5% | [Health Hazard]
Vapors may cause dizziness or asphyxiation without warning. Some may be irritating if inhaled at high concentrations. Contact with gas or liquefied gas may cause burns, severe injury and/or frostbite. Fire may produce irritating and/or toxic gases. | [Potential Exposure]
Neopentane is used as a gasoline
blending component; for making butyl rubber. A research
chemical. Reacts with strong oxidizers, causing fire and
explosion hazard. Attacks some plastics, rubbers, and
coatings. | [Fire Hazard]
EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. | [First aid]
If this chemical gets into the eyes, remove any
contact lenses at once and irrigate immediately for at least
15 minutes, occasionally lifting upper and lower lids. Seek
medical attention immediately. If this chemical contacts the
skin, remove contaminated clothing and wash immediately
with soap and water. Seek medical attention immediately.
If this chemical has been inhaled, remove from exposure,
begin rescue breathing (using universal precautions, including
resuscitation mask) if breathing has stopped and CPR if
heart action has stopped. Transfer promptly to a medical
facility. When this chemical has been swallowed, get medical
attention. Give large quantities of water and induce
vomiting. Do not make an unconscious person vomit. If
frostbite has occurred, seek medical attention immediately;
do NOT rub the affected areas or flush them with water. In
order to prevent further tissue damage, do NOT attempt to
remove frozen clothing from frostbitten areas. If frostbite
has NOT occurred, immediately and thoroughly wash contaminated
skin with soap and water. | [Shipping]
UN2044 2,2-Dimethylpropane, Hazard Class:
2.1; Labels: 2.1-Flammable gas. Cylinders must be transported
in a secure upright position, in a well-ventilated
truck. Protect cylinder and labels from physical damage.
The owner of the compressed gas cylinder is the only entity
allowed by federal law (49CFR) to transport and refill
them. It is a violation of transportation regulations to refill
compressed gas cylinders without the express written permission
of the owner. | [Incompatibilities]
Incompatible with oxidizers (chlorates,
nitrates, peroxides, permanganates, perchlorates, chlorine,
bromine, fluorine, etc.); contact may cause fires or explosions.
Keep away from alkaline materials, strong bases,
strong acids, oxoacids, epoxides. | [Chemical Properties]
2,2-Dimethylpropane, C5H12, is a flammable liquid and is
physically similar to butane. It is an important component of
petroleum fuel mixtures. | [Chemical Properties]
Colorless gas or very volatile liquid.Soluble in alcohol; insoluble in water. | [Chemical Properties]
Neopentane is an extremely flammable gas
and volatile liquid. | [Waste Disposal]
Return refillable compressed
gas cylinders to supplier. Dissolve or mix the material with a
combustible solvent and burn in a chemical incinerator
equipped with an afterburner and scrubber. All federal, state,
and local environmental regulations must be observed. | [Physical properties]
Colorless, extremely flammable gas which may have a faint, pleasant odor similar to butane.
Usually present as a compressed gas or liquid. | [Definition]
ChEBI: Neopentane is an alkane. | [Source]
California Phase II reformulated gasoline contained 2,2-dimethylpropane at a
concentration of 110 μg/kg (Schauer et al., 2002). | [Environmental Fate]
Photolytic. A rate constant of 6.50 x 10-11 cm3/molecule?sec was reported for the reaction of 2,2-
dimethylpropane with OH radicals in air at 298 (Greiner, 1970). Rate constants of 9.0 x 10-13 and
8.49 x 10-13 cm3/molecule?sec were reported for the reaction of 2,2-dimethylpropane with OH in
air (Atkinson et al., 1979; Winer et al., 1979).
Chemical/Physical. Complete combustion in air yields carbon dioxide and water vapor. 2,2-
Dimethylpropane will not hydrolyze because it has no hydrolyzable functional group. | [Purification Methods]
It is freed from isobutene by passage over conc H2SO4 or P2O5, and through silica gel. [Beilstein 1 H 141, 1 I 50, 1 II 104, 1 369, 1 IV 333.] Nerolidol (3,7,11-trimethyl-1,6,10-dodecatrien-3-ol) M 222.4 [cis/trans 7212-44-4] b |
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