ement Method: Dry Scrubbing or Catalytic
Carbon Monoxide Overview:
  • Flammable gas that may cause flash fire
  • Poisonous, colorless, odorless gas
  • Liquid floats and “boils” on water
Chemical Formula: CO
CAS #: 630-08-0
Molecular Weight: 28.01 gram/mole
  • Toxic by inhalation
  • Cannot be detected by odor
  • CO combines with red blood cells so they are unable to carry oxygen
Incompatibles: Oxidizing materials, halogens, metal oxides, metals, combustible materials, lithium, permanganates
Flash Point: -306 F (-187.8 C)
Autoignition Temperature: 1128 F (608.9 C)
Decomposition Temperature: 752 F (400 C)
Flammable Range: LEL= 12.5% by volume; UEL= 74% by volume
Water Solubility: 2.3% @ 20 C
NFPA Ratings: Health = 3; Fire= 4; Reactivity= 0
IDLH: 1,200 ppm
OSHA TWA / ACGIH TWA: 50 ppm (55 mg/m3) / 25 ppm
Signs & Symptoms of CO Exposure:
  • Change in body temperature, bluish skin color, change in blood pressure; nauseam vomiting, chest pain, difficulty breathing, irregular heartbeat, headache, drowsiness, fatigues, dizziness, disorientation, hallucinations, pain in extremities, tremors, loss of coordination, heating loss, visual disturbances, eye damage, suffocation, blood disorders, convulsions, coma
  • Long term exposure of CO may cause heart damage, nerve damage, reproductive effects, birth defects, brain damage
batement Method: Dry Scrubbing
Nitrogen Dioxide Overview:
  • Non-flammable liquid or gas
  • Yellow or brown gas with pungent, irritating odor
  • Odor Threshold = 5 ppm
Chemical Formula: NO2
CAS #: 10102-44-0
Molecular Weight: 46.05 gram/mole
  • Potentially fatal if inhaled
  • Nitrogen dioxide decomposes in water to form nitric acid and nitric acid
  • NO2 is corrosive to copper and its alloys; it is very corrosive to most metals under wet conditions particularly with high chromium content and nickel-chromium-iron-molybdenum and nickel-chromium-molybdenum alloys and aluminum except stainless steel

Incompatibles: Combustible materials, reducing agents, organic matter, fluorine, alcohols, acetic anhydride, ammonia, boron trichloride, calcium, dimethyl sulfoxide, formaldehyde, hydrocarbons, nitrogen trichloride, triethylamine, tetramethyltin, unsaturated hydrocarbons, vinyl chloride, aluminum powder, carbon disulfide, halocarbons, hydrogen, oxygen, carbonyl metals, cyclopentadiene, fuels
Water Solubility: 7.4%
Gas Density: 1.2 g/L
NFPA Ratings: Health = 3; Fire= 0; Reactivity= 0; Special = OX
IDLH: 20 ppm
ACGIH TLV/STEL: 3 ppm / 5 ppm
Signs & Symptoms of Nitrogen Dioxide Exposure:
  • Inhalation can cause respiratory tract burns, skin burns, eye burns, mucous membrane burns
  • Cough, cough, fatigue, nausea, stomach pain, difficulty breathing, irregular heartbeat, headache, dizziness, bluish skin color, lung congestion, lung damage, unconsciousness,
ment Method: Dry Scrubbing
Nitric Oxide Overview:
  • Poisonous, oxidizing, corrosive, colorless, non-flammable gas with a pungent irritating odor
  • Odor Threshold: 0.3 – 1.0 ppm
  • Poisonous red-brown vapor cloud is produced when reacts with water
Chemical Formula: NO
CAS #: 10102-43-9
Molecular Weight: 30.006 gram/mole
  • Nitric oxide readily converts to nitrogen dioxide in air
  • Inhalation can be fatal
  • Vigorously accelerates combustion
  • Thermal decomposition produces highly toxic nitrogen oxides
  • Attacks some plastics, rubber and coatings
Incompatibles: Combustible materials, reducing materials, chlorinated hydrocarbons, ammonia, carbon disulfide, many metals, fluorine, and ozone
Water Solubility: 7.3% @ 0 C
Gas Density: 1.3402 g/L
NFPA Ratings: Health = 3; Fire= 0; Reactivity= 0; Special = OX
IDLH: 100 ppm
ACGIH TWA : 25 ppm (31 mg/m3)
Signs & Symptoms of Nitric Oxide Exposure:
  • Severe irritant to skin and may cause burns
  • Severely irritating to eyes and may cause serious damage to eyes
ment Method: Dry Scrubbing or Wet Scrubbing
Nitrous Oxide Overview:
  • Oxidizer; non-flammable
  • Colorless liquefied compressed gas
  • Odorless to mild sweet odor
  • Sinks and boils in water; solution is acidic
Chemical Formula: N2O
CAS #: 10024-97-2
Molecular Weight: 44.02 gram/mole
  • Non-flammable gas but extremely flammable in presence of reducing materials and combustible materials
  • Inhalation can be fatal
  • At temperature increases above 1,202oF (650oC), N2O becomes both a strong oxidizer and self-reactive.
Incompatibles: Combustible materials, metals, bases, reducing agents, peroxides, metal salts, metal oxides, aluminum, boron, hydrazine, lithium hydride, phosphine, sodium,
Water Solubility: 59% @ 25 C
Gas Density: 1.8122 g/L (25 C )
NFPA Ratings: Health = 1; Fire= 0; Reactivity= 0; Special = OX
IDLH: n.a.
NIOSH TWA / ACGIH TWA (Ceiling): 25 ppm (46 mg/m3) / 50 ppm (90 mg/m3)
Signs & Symptoms of Nitrous Oxide Exposure:
  • Nausea, vomiting, symptoms of drunkenness, hyperactivity or drowsiness, hearing loss, breathing difficulty, asphyxia and suffocation
  • Blisters, frostbite
ement Method: Dry Scrubbing or Catalytic
Ozone Overview:
  • Poisonous, unstable gas; powerful oxidizer
  • Dark blue liquid under pressure or solid
  • Colorless to bluish gas with pungent, sulfur-like odor
  • Minimum detectable by odor at 0.1 ppm; sharp disagreeable odor at 1.00 ppm
Chemical Formula: O3
CAS #: 10028-15-6
Molecular Weight: 48.0 gram/mole
  • Non-flammable gas but enhances combustion of other substances
  • Spontaneously decomposed to oxygen under ordinary conditions
  • Some reactions my cause fire or explosion
  • Can react explosively with readily oxidizable substances and reducing agents
  • Decomposition of ozone at high concentrations can become explosive
Incompatibles: Oxidizable materials, alkenes, aniline, benzene, bromine, ether, ethylene, hydrogen bromide, nitric oxide, and stibine
Water Solubility: 3 mg/L @ 20 C
Gas Density: 2.14 g/L (0 C and 1 atm)
NFPA Ratings: Health = 3; Fire= 0; Reactivity= 1; Special = OX
IDLH: 10 ppm
OSHA TWA / ACGIH TLV (Ceiling): 0.1 ppm (0.2 mg/m3) / 0.1 ppm (0.2 mg/m3)
Signs & Symptoms of O3 Exposure:
  • Inhalation can irritate nose, throat, and cause dryness.
  • Pain or congestion in chest, wheezing and coughing
  • Irritate eyes, headache, nausea, and cause difficulty breathing
  • Concentration nears 9 ppm can cause pneumonia, excessive sweating, decreased blood pressure, and weak and rapid pulse