Propin Chemische Eigenschaften,Einsatz,Produktion Methoden
ERSCHEINUNGSBILD
FARBLOSES KOMPRIMIERTES GAS MIT CHARAKTERISTISCHEM GERUCH.
PHYSIKALISCHE GEFAHREN
Das Gas ist schwerer als Luft und kann sich am Boden ausbreiten. Fernzündung m?glich. Flie?en, Schütten o.?. kann zu elektrostatischer Aufladung führen.
CHEMISCHE GEFAHREN
Zersetzung beim Erhitzen und steigendem Druck unter Feuer- und Explosionsgefahr.
ARBEITSPLATZGRENZWERTE
TLV: 1000 ppm (als TWA); (ACGIH 2005).
MAK: IIb (nicht festgelegt, aber Informationen vorhanden) (DFG 2006).
AUFNAHMEWEGE
Aufnahme in den K?rper durch Inhalation.
INHALATIONSGEFAHREN
Beim Entweichen aus dem Beh?lter kann das Gas die Luft verdr?ngen. Erstickungsgefahr in geschlossenen R?umen.
WIRKUNGEN BEI KURZZEITEXPOSITION
WIRKUNGEN BEI KURZZEITEXPOSITION: Die Substanz reizt die Atemwege. Schnelle Verdampfung kann zu Erfrierungen führen. Exposition kann Bewusstseinstrübung verursachen.
LECKAGE
Gefahrenbereich verlassen! Belüftung. Zündquellen entfernen. Wasserstrahl NIEMALS auf die Flüssigkeit richten. Pers?nliche Schutzausrüstung: Chemikalienschutzanzug mit umgebungsluftunabh?ngigem Atemschutzger?t.
R-S?tze Betriebsanweisung:
R11:Leichtentzündlich.
R37:Reizt die Atmungsorgane.
S-S?tze Betriebsanweisung:
S16:Von Zündquellen fernhalten - Nicht rauchen.
S36:DE: Bei der Arbeit geeignete Schutzkleidung tragen.
S38:Bei unzureichender Belüftung Atemschutzger?t anlegen.
Chemische Eigenschaften
Propyne,C3H4, is a colorless, highly flammable, and explosive
gas. Sources of propyne emissions to the atmosphere
include automobile and turbine exhaust, biomass and
polymer combustion, petroleum manufacturing, and tobacco
smoke.
Verwenden
Propyne is produced by thermal or catalytic pyrolysis of
propene. Like acetylene, propyne is used as a welding torch
fuel, as a specialty fuel, and chemical intermediate.
Allgemeine Beschreibung
A colorless liquefied gas with a sweet odor. Mp: -104°C, bp: -23.1°C. Insoluble in water, soluble in ethanol, chloroform and benzene. Moderately toxic by inhalation. Used as a speciality fuel. Denser than air. Vapors may ignite at distant sources of ignition and flash back.
Air & Water Reaktionen
Highly flammable. PEROXIDE FORMING WHICH LEADS TO EXPLOSIONS
Reaktivit?t anzeigen
Propyne is highly flammable. The liquid material in cylinders contains about 30% propadiene. Detonation may occur at 95° C [MCA Case History No. 632]. Reacts exothermically with many oxidizing agents and with some reducing agents as well. May react with silver, copper, and mercury salts in aqueous solution to give explosive acetylides. Incompatible with brass that contains more than 65% copper, with other copper-containing alloys, with Monel metal, with neoprene, polyethylene, and, to a lesser extent, with Teflon. May enflame in air in the presence of Co, Hg, Hg salts, K, Ag, Ag salts, RbH, CsH, halogens, HNO3, NaH. Can decompose explosively when compressed to 4.5 to 5.6 atmospheres. Moderate explosion hazard when exposed to heat or flame or by spontaneous chemical reaction. Has been known to decompose explosively at high pressures and moderate temperatures in the absence of air.
Hazard
Flammable, dangerous fire risk. Toxic by
inhalation. Central nervous system impairment.
Health Hazard
At high concentrations methyl
acetylene causes narcosis in animals, and it is
expected that severe exposure will produce the
same effect in humans.
Sicherheitsprofil
Ths compound is a
simple anesthetic and in high concentration
is an asphyxiant. Mutation data reported.
Dangerous fire hazard when exposed to heat
or flame; can react vigorously with oxibzing
materials. Explosive in the form of vapor
when exposed to heat or flame. Localized
heating of liquid-containing cylinders to
95°C may cause an explosion. Product of
reaction with silver nitrate ignites at 150°C.
A commercial mixture containing 30%
propyne in MAPP gas is similar to ethylene
in potential hazards and handling
requirements. To fight fire, stop flow of gas.
When heated to decomposition it emits
acrid smoke and irritating fumes. See also
ACETYLENE COMPOUNDS.
m?gliche Exposition
This material may be used as a liquid
rocket propellant, in admixture with propadiene as an
industrial cutting fuel.
Environmental Fate
Chemical/Physical. When passed through a cold solution containing hydrobromite ions, 1-bromo-1-propyne was formed (Hatch and Kidwell, 1954).
Combustion products include carbon monoxide, carbon dioxide, and water vapor.
Versand/Shipping
UN3161 Liquefied gas, flammable, n.o.s.,
Hazard Class: 2.1; Labels: 2.1-Flammable gas, Technical
Name Required. 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.
l?uterung methode
Purify it by preparative gas chromatography. [Beilstein 1 H 246.]
Inkompatibilit?ten
Forms explosive gas mixture with air. The
liquid material in cylinders contains about 30% propadiene.
Detonation may occur at 95C. May form explosive peroxides. Can decompose explosively on heating and @
4.55.6 atmospheres of pressure. Strong oxidizers may cause
fire and explosions. Forms shock sensitive compounds with
copper, magnesium, silver and their alloys. Copper or copper
alloys containing more than 67% copper should not be used
in handling equipment. Attacks some plastics, rubber and
coatings.
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.
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