ISOBUTANE

Gases under pressure: Compressed gas

Flammable gases, Category 1A, Flammable gas

Germ cell mutagenicity, Category 1B

Carcinogenicity, Category 1A

H220 Extremely flammable gas

H280 Contains gas under pressure; may explode if heated

P210 Keep away from heat/sparks/open flames/hot surfaces. — No smoking.

P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely.

P403 Store in a well-ventilated place.

P410 Protect from sunlight.

P210 Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking.

P203 Obtain, read and follow all safety instructions before use.

P280 Wear protective gloves/protective clothing/eye protection/face protection/hearing protection/...

P377 Leaking gas fire: Do not extinguish, unless leak can be stopped safely.

P381 In case of leakage, eliminate all ignition sources.

P318 IF exposed or concerned, get medical advice.

P410+P403 Protect from sunlight. Store in a well-ventilated place.

P403 Store in a well-ventilated place.

P405 Store locked up.

P501 Dispose of contents/container to an appropriate treatment and disposal facility in accordance with applicable laws and regulations, and product characteristics at time of disposal.

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Fresh air, rest. Refer for medical attention.

ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention .

First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then refer for medical attention.

Rinse mouth with water. Do not induce vomiting. Never give anything by mouth to an unconscious person. Call a doctor or Poison Control Center immediately.

Central nervous system depression ranging from dizziness and incoordination to anesthesia and respiratory arrest, depending on concentration and extent of inhalation. Irregular heartbeat is rare but is a dangerous complication at anesthetic levels. (USCG, 1999)

INHALATION: Fresh air, rest. Refer for medical attention. Half-upright position. Artificial respiration may be needed. Refer for medical attention. SKIN: ON FROSTBITE: rinse with plenty of water, do NOT remove clothes. Refer for medical attention. EYES: First rinse with plenty of water for several minutes (remove contact lenses if easily possible), then take to a doctor.

Butane is a flammable gas. In case of fire, stop the flow of gas if it can be done safely. Use dry chemical, carbon dioxide, or halon extinguishers. Use water to keep fire-exposed containers cool and to protect personnel doing the shut-off. If leak or spill has caught fire, use water spray to disperse gas and to protect personnel shutting off leak. If cooling streams are ineffective (venting sound increases in volume and pitch, tank discolors, or shows any signs of deforming), withdraw immediately to a secure position. If material or contaminated runoff enters waterways, notify downstream users of potentially contaminated waters. Contact your Department of Environmental Protection or your regional office of the federal EPA for specific recommendations. If employees are required to fight fires, they must be properly trained and equipped. OSHA 1910.156. Butanes

Excerpt from ERG Guide 115 [Gases - Flammable (Including Refrigerated Liquids)]: EXTREMELY FLAMMABLE. Will be easily ignited by heat, sparks or flames. Will form explosive mixtures with air. Vapors from liquefied gas are initially heavier than air and spread along ground. CAUTION: Hydrogen (UN1049), Deuterium (UN1957), Hydrogen, refrigerated liquid (UN1966) and Methane (UN1971) are lighter than air and will rise. Hydrogen and Deuterium fires are difficult to detect since they burn with an invisible flame. Use an alternate method of detection (thermal camera, broom handle, etc.) Vapors may travel to source of ignition and flash back. Cylinders exposed to fire may vent and release flammable gas through pressure relief devices. Containers may explode when heated. Ruptured cylinders may rocket. (ERG, 2016)

Shut off supply; if not possible and no risk to surroundings, let the fire burn itself out. In other cases extinguish with water spray. In case of fire: keep cylinder cool by spraying with water. Combat fire from a sheltered position.

Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. NEVER direct water jet on liquid. Personal protection: filter respirator for organic vapours of low boiling point adapted to the airborne concentration of the substance.

Evacuate danger area! Consult an expert! Ventilation. Remove all ignition sources. NEVER direct water jet on liquid. Personal protection: filter respirator for organic vapours of low boiling point adapted to the airborne concentration of the substance.

Evacuate and restrict persons not wearing protective equipment from area of spill or leak until cleanup is complete. Remove all ignition sources. Keep the gas concentration below the explosive limit range by forced ventilation. Stop the flow of gas. If source of leak is a cylinder and the leak cannot be stopped in place, remove leaking cylinder to a safe place in the open air, and repair leak or allow cylinder to dissipate to the atmosphere. If employees are required to clean up spills, they must be properly trained and equipped. OSHA 1910.120(q) may be applicable. Butanes

NO open flames, NO sparks and NO smoking. Closed system, ventilation, explosion-proof electrical equipment and lighting. Prevent build-up of electrostatic charges (e.g., by grounding) if in liquid state. Handling in a well ventilated place. Wear suitable protective clothing. Avoid contact with skin and eyes. Avoid formation of dust and aerosols. Use non-sparking tools. Prevent fire caused by electrostatic discharge steam.

Fireproof. Cool.Store in tightly closed containers in a cool, well-ventilated area away from incompatible materials ... and heat. Butanes

TLV: 1000 ppm as STEL.MAK: 2400 mg/m3, 1000 ppm; peak limitation category: II(4); pregnancy risk group: D

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Ensure adequate ventilation. Handle in accordance with good industrial hygiene and safety practice. Set up emergency exits and the risk-elimination area.

Wear safety goggles or face shield.

Cold-insulating gloves. Protective clothing.

Use ventilation, local exhaust or breathing protection.

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Reacts with strong oxidants, acetylene, halogens and nitrogen oxides. This generates fire and explosion hazard.

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SEVERE, WHEN EXPOSED TO HEAT OR FLAME.The gas is heavier than air and may travel along the ground; distant ignition possible. As a result of flow, agitation, etc., electrostatic charges can be generated.ISOBUTANE is incompatible with the following: Strong oxidizers (e.g., nitrates & perchlorates), chlorine, fluorine, (nickel carbonyl + oxygen) (NIOSH, 2016).

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Reacts with strong oxidants, acetylene, halogens and nitrogen oxides causing fire and explosion hazard.

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Rapid evaporation of the liquid may cause frostbite. The substance may cause effects on the cardiovascular system. This may result in impaired functions and respiratory failure. Exposure at high levels could cause death.

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A harmful concentration of this gas in the air will be reached very quickly on loss of containment.

AEROBIC: Indigenous soil microorganisms will biodegrade petroleum products under aerobic conditions(1). Biodegradation may occur under anaerobic conditions at a much slower rate, particularly by sulfur-reducing bacteria(2). It was demonstrated that isobutane is oxidized by bacteria as the sole source of carbon and energy(1). The bacteria were isolated from lake water and soil near a refinery in New Jersey. In the case of a Brevibacterium sp., the rate of oxidation of isobutane was about 70% that of n-butane. However, no isobutane degraded in 8 days when incubated with groundwater contaminated with gasoline(3). Isobutane was subject to biodegradation in a microcosm designed to simulate conditions in Narragansett Bay, RI in September and November(4). The biodegradation half-lives for isobutane were 16-26 days for September (20 deg C) and 33-139 days for November (10 deg C)(4). The degradation rate was slower than for n-butane and fell between that of propane and ethane. The biodegradation increased markedly on acclimation. Approximately 95% of the isobutane present in the microcosm after 12.9 days degraded within the next 2 days(1).

An estimated BCF of 27 was calculated for isobutane(SRC), using a log Kow of 2.76(1) and a regression-derived equation(2). According to a classification scheme(3), this BCF suggests the potential for bioconcentration in aquatic organisms is low(SRC).

Using an estimation method based on molecular connectivity indices(1), the Koc for isobutane is estimated to be 35(SRC). According to a suggested classification scheme(2), this Koc value suggests that isobutane will have very high mobility in soil(SRC).

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The material can be disposed of by removal to a licensed chemical destruction plant or by controlled incineration with flue gas scrubbing. Do not contaminate water, foodstuffs, feed or seed by storage or disposal. Do not discharge to sewer systems.

Containers can be triply rinsed (or equivalent) and offered for recycling or reconditioning. Alternatively, the packaging can be punctured to make it unusable for other purposes and then be disposed of in a sanitary landfill. Controlled incineration with flue gas scrubbing is possible for combustible packaging materials.

ADR/RID: UN1969 (For reference only, please check.)

IMDG: UN1969 (For reference only, please check.)

IATA: UN1969 (For reference only, please check.)

ADR/RID: ISOBUTANE (For reference only, please check.)

IMDG: ISOBUTANE (For reference only, please check.)

IATA: ISOBUTANE (For reference only, please check.)

ADR/RID: 2.1 (For reference only, please check.)

IMDG: 2.1 (For reference only, please check.)

IATA: 2.1 (For reference only, please check.)

ADR/RID: (For reference only, please check.)

IMDG: (For reference only, please check.)

IATA: (For reference only, please check.)

ADR/RID: No

IMDG: No

IATA: No

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Turn leaking cylinder with the leak up to prevent escape of gas in liquid state.The measures mentioned in section PREVENTION are applicable to production, filling of cylinders, and storage of the gas.