METHANE GAS

SECTION 2: Hazards identification

EMERGENCY OVERVIEW: Methane is an odorless, colorless gas, or a colorless, odorless liquid in its cryogenic form. Both the liquid and the gas pose a serious fire hazard when accidentally released. The liquid will rapidly boil to the gas at standard temperatures and pressures. As a gas, it will act as a simple asphyxiant and present a significant health hazard by displacing the oxygen in the atmosphere. The gas is lighter than air and may spread long distances. Distant ignition and flashback are possible. The liquefied gas can cause frostbite to any contaminated tissue. Flame or high temperature impinging on a localized area of the cylinder of Methane can cause the cylinder to rupture without activating the cylinder’s relief devices. Provide adequate fire protection during emergency response situations. Allow the released gas to dissipate in the atmosphere. SYMPTOMS OF OVEREXPOSURE BY ROUTE OF EXPOSURE: The HAZARDOUS MATERIAL INFORMATION most significant route of overexposure for this gas is by inhalation. The SYSTEM following paragraphs describe symptoms of exposure by route of exposure. HEALTH (BLUE) 1 INHALATION: High concentrations of this gas can cause an oxygen- deficient environment. Individuals breathing such an atmosphere may experience symptoms which include headaches, ringing in ears, dizziness, drowsiness, unconsciousness, nausea, vomiting, and depression of all the senses. Under some circumstances of FLAMMABILITY (RED) 4 overexposure, death may occur. The effects associated with various levels of oxygen are as follows: CONCENTRATION SYMPTOMS OF EXPOSURE REACTIVITY 12-16% Oxygen: Breathing and pulse rate increased, (YELLOW) 0 muscular coordination slightly disturbed. 10-14% Oxygen: Emotional upset, abnormal fatigue, disturbed respiration. B 6-10% Oxygen: Nausea and vomiting, collapse or loss of PROTECTIVE EQUIPMENT consciousness. Below 6%: Convulsive movements, possible respiratory EYES RESPIRATORY HANDS BODY collapse, and death. OTHER POTENTIAL HEALTH EFFECTS: Contact with cryogenic See liquid or rapidly expanding gases (which are released under high pressure) may cause frostbite. Symptoms of frostbite include change in skin color to white or grayish-yellow. The pain after contact with the For routine industrial applications liquid can quickly subside. See Section 16 for Definition of Ratings

Potential health effects

OR RISKS FROM EXPOSURE An Explanation in Lay Terms. Overexposure to Methane may cause the following health effects: ACUTE: The most significant hazard associated with this gas is inhalation of oxygen-deficient atmospheres. Symptoms of oxygen deficiency include respiratory difficulty, headache, dizziness, and nausea. At high concentrations, unconsciousness or death may occur. Contact with cryogenic liquid or rapidly expanding gases may cause frostbite. CHRONIC: There are currently no known adverse health effects associated with chronic exposure to Methane. TARGET ORGANS: Respiratory system. What should I do if a hazardous situation occurs?