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Section 2. Hazards Identification OSHA/HCS Status : This Material Is Considered Hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200)

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Section 2. Hazards Identification OSHA/HCS Status : This Material Is Considered Hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200) SAFETY DATA SHEET Flammable Gas Mixture: 1-Butene / 1,3-Butadiene / Argon / Benzene / Ethane / Ethylene / Hydrogen / Methane / N-Butane / N-Pentane / Nitrogen / Propane / Propylene / Styrene / Toluene Section 1. Identification GHS product identifier : Flammable Gas Mixture: 1-Butene / 1,3-Butadiene / Argon / Benzene / Ethane / Ethylene / Hydrogen / Methane / N-Butane / N-Pentane / Nitrogen / Propane / Propylene / Styrene / Toluene Other means of : Not available. identification Product type : Gas. Product use : Synthetic/Analytical chemistry. SDS # : 021932 Supplier's details : Airgas USA, LLC and its affiliates 259 North Radnor-Chester Road Suite 100 Radnor, PA 19087-5283 1-610-687-5253 24-hour telephone : 1-866-734-3438 Section 2. Hazards identification OSHA/HCS status : This material is considered hazardous by the OSHA Hazard Communication Standard (29 CFR 1910.1200). Classification of the : FLAMMABLE GASES - Category 1 substance or mixture GASES UNDER PRESSURE - Compressed gas GERM CELL MUTAGENICITY - Category 1 CARCINOGENICITY - Category 1 SPECIFIC TARGET ORGAN TOXICITY (SINGLE EXPOSURE) (Narcotic effects) - Category 3 GHS label elements Hazard pictograms : Signal word : Danger Hazard statements : Extremely flammable gas. May form explosive mixtures with air. Contains gas under pressure; may explode if heated. May displace oxygen and cause rapid suffocation. May cause genetic defects. May cause cancer. May cause drowsiness or dizziness. Precautionary statements General : Read and follow all Safety Data Sheets (SDS’S) before use. Read label before use. Keep out of reach of children. If medical advice is needed, have product container or label at hand. Close valve after each use and when empty. Use equipment rated for cylinder pressure. Do not open valve until connected to equipment prepared for use. Use a back flow preventative device in the piping. Use only equipment of compatible materials of construction. Approach suspected leak area with caution. Prevention : Obtain special instructions before use. Do not handle until all safety precautions have been read and understood. Wear protective gloves. Wear eye or face protection. Wear protective clothing. Keep away from heat, hot surfaces, sparks, open flames and other ignition sources. No smoking. Use only outdoors or in a well-ventilated area. Avoid breathing gas. Date of issue/Date of revision : 11/22/2017 Date of previous issue : No previous validation Version : 1 1/16 Flammable Gas Mixture: 1-Butene / 1,3-Butadiene / Argon / Benzene / Ethane / Ethylene / Hydrogen / Methane / N-Butane / N-Pentane / Nitrogen / Propane / Propylene / Styrene / Toluene Section 2. Hazards identification Response : IF exposed or concerned: Get medical attention. IF INHALED: Remove person to fresh air and keep comfortable for breathing. Call a POISON CENTER or physician if you feel unwell. Leaking gas fire: Do not extinguish, unless leak can be stopped safely. Eliminate all ignition sources if safe to do so. Storage : Store locked up. Protect from sunlight. Store in a well-ventilated place. Disposal : Dispose of contents and container in accordance with all local, regional, national and international regulations. Hazards not otherwise : In addition to any other important health or physical hazards, this product may displace classified oxygen and cause rapid suffocation. Section 3. Composition/information on ingredients Substance/mixture : Mixture Other means of : Not available. identification Product code : 021932 Ingredient name % CAS number propylene 0.0001 - 99 115-07-1 ethylene 1 - 99 74-85-1 ethane 0.0001 - 99 74-84-0 Propane 0.0001 - 99 74-98-6 hydrogen 0.0001 - 99 1333-74-0 methane 0.0001 - 99 74-82-8 Nitrogen 0.0001 - 50 7727-37-9 1-Butene 0.0001 - 10 106-98-9 N-Butane 0.0001 - 10 106-97-8 Argon 0.0001 - 10 7440-37-1 1,3-butadiene 0.1 - 0.9999 106-99-0 n-pentane 0.0001 - 0.25 109-66-0 benzene 0.0001 - 0.0999 71-43-2 styrene 0.0001 - 0.05 100-42-5 toluene 0.0001 - 0.05 108-88-3 Any concentration shown as a range is to protect confidentiality or is due to batch variation. There are no additional ingredients present which, within the current knowledge of the supplier and in the concentrations applicable, are classified as hazardous to health or the environment and hence require reporting in this section. Occupational exposure limits, if available, are listed in Section 8. Section 4. First aid measures Description of necessary first aid measures Eye contact : Immediately flush eyes with plenty of water, occasionally lifting the upper and lower eyelids. Check for and remove any contact lenses. Continue to rinse for at least 10 minutes. Get medical attention. Inhalation : Remove victim to fresh air and keep at rest in a position comfortable for breathing. If it is suspected that fumes are still present, the rescuer should wear an appropriate mask or self-contained breathing apparatus. If not breathing, if breathing is irregular or if respiratory arrest occurs, provide artificial respiration or oxygen by trained personnel. It may be dangerous to the person providing aid to give mouth-to-mouth resuscitation. Get medical attention. If necessary, call a poison center or physician. If unconscious, place in recovery position and get medical attention immediately. Maintain an open airway. Loosen tight clothing such as a collar, tie, belt or waistband. In case of inhalation of decomposition products in a fire, symptoms may be delayed. The exposed person may need to be kept under medical surveillance for 48 hours. Date of issue/Date of revision : 11/22/2017 Date of previous issue : No previous validation Version : 1 2/16 Flammable Gas Mixture: 1-Butene / 1,3-Butadiene / Argon / Benzene / Ethane / Ethylene / Hydrogen / Methane / N-Butane / N-Pentane / Nitrogen / Propane / Propylene / Styrene / Toluene Section 4. First aid measures Skin contact : Flush contaminated skin with plenty of water. Remove contaminated clothing and shoes. To avoid the risk of static discharges and gas ignition, soak contaminated clothing thoroughly with water before removing it. Continue to rinse for at least 10 minutes. Get medical attention. Wash clothing before reuse. Clean shoes thoroughly before reuse. Ingestion : As this product is a gas, refer to the inhalation section. Most important symptoms/effects, acute and delayed Potential acute health effects Eye contact : Contact with rapidly expanding gas may cause burns or frostbite. Inhalation : Can cause central nervous system (CNS) depression. May cause drowsiness or dizziness. Skin contact : Contact with rapidly expanding gas may cause burns or frostbite. Frostbite : Try to warm up the frozen tissues and seek medical attention. Ingestion : Can cause central nervous system (CNS) depression. As this product is a gas, refer to the inhalation section. Over-exposure signs/symptoms Eye contact : No specific data. Inhalation : Adverse symptoms may include the following:, nausea or vomiting, headache, drowsiness/fatigue, dizziness/vertigo, unconsciousness Skin contact : No specific data. Ingestion : No specific data. Indication of immediate medical attention and special treatment needed, if necessary Notes to physician : In case of inhalation of decomposition products in a fire, symptoms may be delayed. The exposed person may need to be kept under medical surveillance for 48 hours. Specific treatments : No specific treatment. Protection of first-aiders : No action shall be taken involving any personal risk or without suitable training. If it is suspected that fumes are still present, the rescuer should wear an appropriate mask or self-contained breathing apparatus. It may be dangerous to the person providing aid to give mouth-to-mouth resuscitation. Wash contaminated clothing thoroughly with water before removing it, or wear gloves. See toxicological information (Section 11) Section 5. Fire-fighting measures Extinguishing media Suitable extinguishing : Use an extinguishing agent suitable for the surrounding fire. media Unsuitable extinguishing : None known. media Specific hazards arising : Contains gas under pressure. Extremely flammable gas. In a fire or if heated, a from the chemical pressure increase will occur and the container may burst, with the risk of a subsequent explosion. Hazardous thermal : Decomposition products may include the following materials: decomposition products carbon dioxide carbon monoxide nitrogen oxides Date of issue/Date of revision : 11/22/2017 Date of previous issue : No previous validation Version : 1 3/16 Flammable Gas Mixture: 1-Butene / 1,3-Butadiene / Argon / Benzene / Ethane / Ethylene / Hydrogen / Methane / N-Butane / N-Pentane / Nitrogen / Propane / Propylene / Styrene / Toluene Section 5. Fire-fighting measures Special protective actions : Promptly isolate the scene by removing all persons from the vicinity of the incident if for fire-fighters there is a fire. No action shall be taken involving any personal risk or without suitable training. Contact supplier immediately for specialist advice. Move containers from fire area if this can be done without risk. Use water spray to keep fire-exposed containers cool. If involved in fire, shut off flow immediately if it can be done without risk. If this is impossible, withdraw from area and allow fire to burn. Fight fire from protected location or maximum possible distance. Eliminate all ignition sources if safe to do so. Special protective : Fire-fighters should wear appropriate protective equipment and self-contained breathing equipment for fire-fighters apparatus (SCBA) with a full face-piece
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