Butane 0.0001% to 10% in Nitrogen

SECTION 2: Hazards identification

Emergency Overview: Simple Asphyxiant – This product does not contain oxygen and may cause asphyxia if released in a confined area. High concentrations of butane may have central nervous system effect. Maintain oxygen levels above 19.5%. Contents under pressure. Use and store below 125 OF (520C). Nonflammable when butane concentration is less than 5.6%, flammable if above 5.6% (CGA Pamphlet P-23 2003).

Principle Routes of Exposure

Skin Contact Skin Absorption Eye Contact Inhalation Ingestion No Yes No

Potential health effects

Exposure Limits Irritant Sensitization Yes No Teratogen Reproductive Hazard Mutagen No Synergistic Effects None reported Butane 0.0001% to 10% in Nitrogen, Material Safety Data Sheet # 2020, Page 2 of 5 Continued Carcinogenicity: NTP: No IARC: No OSHA: No Eye Effects: Contact with rapidly expanding gas near the point of release may cause frostbite. Skin Effects: Contact with rapidly expanding gas near the point of release may cause frostbite with redness, skin color change to gray or white, and blistering. Ingestion Effects: None known. Ingestion is unlikely as product is a gas at room temperature. Inhalation Effects: Inhalation of butane vapors may cause dizziness, headache and nausea. High concentrations may depress the central nervous system, causing a loss of consciousness and respiratory paralysis. Product is a simple asphyxiant. High concentrations may exclude an adequate supply of oxygen to the lungs. Effects of oxygen deficiency resulting from simple asphyxiants may include: rapid breathing, diminished mental alertness, impaired muscular coordination, faulty judgment, depression of all sensations, emotional instability, and fatigue. As asphyxiation progresses, nausea, vomiting, prostration, and loss of consciousness may result, eventually leading to convulsions, coma, and death. Oxygen deficiency during pregnancy has produced developmental abnormalities in humans and experimental animals.

Medical Conditions Generally Aggravated by Exposure

None known. NFPA Hazard Codes HMIS Hazard Codes Ratings System Health: 0 Health: 0 0: No Hazard Flammability: 1 Flammability: 1 1: Slight Hazard Instability: 0

Physical hazards

3 2: Moderate Hazard 3: Serious Hazard 4: Severe Hazard Hazard ratings were assigned in accordance with Compressed Gas Association (CGA) guidelines as published in CGA Pamphlet P- 19-2004, CGA Recommended Hazard Ratings for Compressed Gases, 2nd Edition.