CO Carbon Monoxide Gas Flammable , Odorless Tasteless Colorless Gas
Electronic Gases Carbon monoxide (CO) is a colorless, odorless, and
tasteless gas that is slightly less dense than air. It is toxic to
hemoglobic animals (including humans) when encountered in
concentrations above about 35 ppm, although it is also produced in
normal animal metabolism in low quantities, and is thought to have
some normal biological functions. In the atmosphere, it is
spatially variable and short lived, having a role in the formation
of ground-level ozone.
Carbon monoxide consists of one carbon atom and one oxygen atom,
connected by a triple bond that consists of two covalent bonds as
well as one dative covalent bond. It is the simplest oxocarbon
and is isoelectronic with the cyanide anion, the nitrosonium cation
and molecular nitrogen. In coordination complexes the carbon
monoxide ligand is called carbonyl.
Contact with the liquid can cause severe frostbite. Less dense than
air. Easily ignited and a flame can flash back to the source of a
leak very easily. Burns with a violet flame. Under prolonged
exposure to fire or intense heat the containers may rupture
violently and rocket. CARBON MONOXIDE is used in organic synthesis,
metallurgy, and a fuel.
Contact of very cold liquefied gas with water may result in
vigorous or violent boiling and extremely rapid vaporization. If
the water is hot, a liquid "superheat" explosion may occur.
Pressures may build to dangerous levels if the liquid contacts
water in a closed container [Handling Chemicals Safely 1980].
Reacts explosively with bromine trifluoride at high temperatures or
concentrations [Mellor 2, Supp. 1:166 1956]. The same is true for
various oxidizers such as: chlorine dioxide, oxygen (liquid),
peroxodisulfuryl difluoride. Reacts with lithium to give lithium
carbonyl, which detonates violently with water, igniting the
gaseous products [Mellor 2, Supp 2:84 1961]. Potassium and sodium
metals behave similarly. Cesium oxide, iron(III) oxide, and silver
oxide all react, in the presence of moisture, at ambient
temperatures with carbon monoxide causing ignition, [Mellor, 1941,
vol. 2, 487].
Toxic; Extremely Hazardous. Inhalation extremely dangerous; may be
fatal. Contact with gas or liquefied gas may cause burns, severe
injury and/or frostbite. Odorless, will not be detected by sense of
Extremely flammable. May be ignited by heat, sparks or flames.
Flame may be invisible. Containers may explode when heated. Vapor
explosion and poison hazard indoors, outdoors or in sewers. Vapors
from liquefied gas are initially heavier than air and spread along
ground. Vapors may travel to source of ignition and flash back.
Runoff may create fire or explosion hazard.
1. Physical properties
|Specific volume @ +70°F (+21.1°C)||13.81 ft3/lb, 0.86 m3/kg|
|Flammability range||12.5% to 74.2% in air|
|Critical pressure||507.47 psia, 34.99 bar|
|Critical temperature||-220.4°F, -140.2°C|
|Specific gravity @ 70°F, 1 atm (Air=1)||0.967|
2. Typical technical data (COA)
|Carbon Dioxide (CO2)||<10.0|
|THC (as Methane) (CH4)||<0.5|
|Cylinder||Valve Outlet Options||SCF||Liters||PSIG||BAR|
|1||Carbon Monoxide is used in a variety of applications including
silicon-nitride-over-silicon etch to increase selectivity, as a
source of oxygen in oxidation , .|
|2.||As a source of carbon in certain doping processes. Carbon Monoxide
is a colorless, odorless, flammable toxic gas with a TLV of 25 ppm.|
|3||Carbon Monoxide is stable with respect to decomposition.|