MATERIAL SAFETY DATA SHEET Product: Acetylene, dissolved Chemical Name : Acetylene Identification: Chemical Family : Alkane (hydrocarbon) Symbol : C 2H 2 UN 1001 Synonyms Uses : Ethyne, Ethine, Narcylene, Acetylen, vinylene. : Synthetic/Analytical chemistry and industrial uses such as manufacture of carbon black, welding, cutting. Ingredient Composition Information INGREDIENTS PERCENTAGE OHSA PEL-TWA ACGIH TLV-TWA Acetylene 100% Not established Not established EMERGENCY OVERVIEW Hazards Identification Warning! High pressure gas; may explode if heated Can cause rapid suffocation Extremely flammable gas. May form explosive mixtures with air. POTENTIAL HEALTH EFFECTS INFORMATION Routes of Exposure: Inhalation Acetylene is a flammable gas, concentration up the LEL 0f 25000 ppm may cause suffocation by displacing the oxygen in air. Exposure to oxygen deficient atmosphere ( 12-16% ) may cause breathing and pulse rate increased, muscular coordination slightly disturbed. Exposure to atmospheres containing 10-14% oxygen will Emotional upset, abnormal fatigue, disturbed respiration. Exposure to atmospheres containing 6-10% oxygen will cause nausea and vomiting, collapse or loss of consciousness. Lack of sufficient oxygen (Below 6%) may cause serious injury (Convulsive movements, possible respiratory collapse) or death. Eye Contact Skin Contact Skin Absorption Ingestion May be slightly irritating to contaminated eye. May be slightly irritating to contaminated skin
Chronic Effects Medical Conditions Aggravated By Overexposure Other Effects of Overexposure Carcinogenicity There are currently no known adverse health effects associated with chronic exposure to Acetylene. The skin of a victim of over-exposure may have a blue colour. Effect on respiratory system, central nervous system. Not listed First Aid Measures Inhalation Eye Contact Skin Contact Ingestion Persons suffering from lack of oxygen should be removed to fresh air. If victim is not breathing, administer artificial respiration. If breathing is difficult, administer oxygen. Obtain prompt medical attention. If contact is made with the solvent, flush area for 15 minutes with water. Victim(s) must be taken for medical attention. flush area for 15 minutes with water. Victim(s) must be taken for medical attention. Fire Fighting Measures Flash Point Auto-ignition flammable FLAMMABLE LIMITS IN AIR BY VOLUME: Lower 2.5% Upper 82.0% Extinguishing Media Extinguish fires of this gas by shutting-off the source of the gas, if possible. Use water spray to cool fire-exposed cylinders, structures and equipment. Special Fire Fighting Instructions simply to let the burning gas escape from the pressurized cylinder or piping system. If possible, stop the leak before extinguishing fire. If the fire is extinguished before the leak is sealed, the still-leaking Acetylene could explosively re-ignite without warning and cause extensive damage, injury, or fatality. In this case, increase ventilation (in enclosed areas) to prevent flammable or explosive mixture formation. Structural fire-fighters must wear Self-Contained Breathing Apparatus and full protective equipment. Because of the potential for cylinder rupture, evacuation of non-emergency personnel is essential. If water is
not available for cooling or protection of cylinders and exposures, evacuate the area. Unusual Fire and Explosion Hazards Acetylene is extremely flammable and can readily form explosive mixtures with air over a very wide range. An explosion hazard exists in confined spaces when the gas is released. An explosive decomposition of pure acetylene can occur under certain conditions of elevated pressure, temperature and container size. Hazardous Combustion Products When involved in a fire, this material may decompose Sensitivity to Static Discharge and produce toxic gases including carbon monoxide and carbon dioxide. released. Sensitivity to Mechanical Impact May cause this product to ignite explosively, if Not sensitive Accidental Release Measures Steps to Be Taken if Material is Released or Spilled: Evacuate personnel from the affected area. Shut off source of Acetylene, if without risk. Ventilate enclosed areas or remove cylinders to an outdoor location. If leaking from cylinder or its valve, contact your supplier THIS IS AN EXTREMELY FLAMMABLE GAS. Protection of all personnel and the area must be maintained. Handling and Storage Precautions To Be Taken In Storage: Store and use with adequate ventilation. Cylinders should be stored upright with valve protection cap in place and firmly secured to prevent falling or being knocked over. Protect cylinders from physical damage; do not drag, slide or drop. Do not allow storage area temperature to exceed 52 C. Full and empty cylinders should be segregated. Post No Smoking/No Open Flames signs in storage and use areas. Cylinders should be separated from oxygen cylinders, or other oxidizers, by a minimum distance of 20 ft., or by a barrier of non-combustible material at least 5 ft. high, having a fire-resistance rating of at least 0.5 hours. Isolate from other incompatible chemicals It is important to note that Acetylene, in its free state, under pressure, may decompose violently. The higher the pressure, the smaller the initial force necessary to cause a reaction. Therefore, never use Acetylene outside the cylinder at pressures in excess of 15 psig. If pressures exceeding this limit are utilized, special explosion and fire safety precautions must be implemented. Keep the smallest amount on-site as is necessary Precautions To Be Taken In Handling: Use a suitable hand truck for cylinder movement. Never attempt to lift a cylinder by its valve protection cap. If user experiences any difficulty operating cylinder valve discontinue use and contact supplier. Use an adjustable strap wrench to remove overtight or rusted caps. Never strike an arc on a compressed gas cylinder or make a cylinder a part of an electrical circuit. For additional precautions in using Acetylene, see Other Information, e.g. CGA (Compressed Gas Association), EIGA (European Industrial Gas Association), etc. Protective Practices During Maintenance of Contaminated Equipment: Follow practices indicated in Section Accidental Release Measures. Make certain application equipment is locked and tagged-out safely. Purge Acetylene-handling equipment with inert gas (i.e. nitrogen) before attempting repairs. Always use product in areas where adequate ventilation is provided.
Exposure Control / Personal Protection ENGINEERING CONTROLS: Ventilation Natural or mechanical to prevent oxygen-deficient atmospheres under 19.5% oxygen Respiratory Protection: Maintain oxygen levels above 19.5% in the workplace. Use supplied air respiratory protection if oxygen levels are below 19.5% or during emergency response to a release of this product. During an emergency situation, before entering the area, check for flammable gas level as well as oxygen-deficient atmospheres. If respiratory protection is required, follow the requirements of the Federal OSHA Respiratory Protection Standard (29 CFR 1910.134), or equivalent State standards. General Use Emergency Use required Self-contained breathing apparatus (SCBA) or positive pressure airline with mask are to be used in oxygen-deficient atmosphere. Air purifying respirators will not function. Protective Gloves Work gloves are recommended when handling cylinders Eye Protection Safety glasses are recommended when handling cylinders Other Protective Equipment Metatarsal Safety shoes when handling containers Use body protection appropriate for task. Cotton clothing is recommended for use to prevent static electric build-up. Exposure CAS Number 74-86-2 Exposure Limit NIOSH REL (United States, 10/2013). CEIL: 2662 mg/m³ CEIL: 2500 ppm Physical and Chemical Properties Molecular Weight 26.04 g/mol Boiling point at 1 atm -84 C Melting point at 1 atm -81 C Density of the gas at 0 C and 1atm 1.1716 kg/m 3 Specific Gravity of gas at 0 C and 1 atm 0.906 Vapour Pressure at 21.1 C 4378 kpa Solubility in water vol/vol at 0 C 1.7 PH
Appearance, Odour and State Odour Threshold Colourless, Mild.Ethereal and gas at normal temperature and pressure Stability and Reactivity Stability Stable Conditions to Avoid: Avoid all possible sources of ignition (spark or flame). Do not pressurize, cut, weld, braze, solder, drill, grind or expose containers to heat or sources of ignition. Incompatibility (Materials to avoid) Oxidizers (Acetylene is not compatible with the following materials: Strong oxidizers (i.e. chlorine, bromine pentafluoride, oxygen, oxygen difluoride, and nitrogen trifluoride); calcium hypochlorite; various heavy metals (copper, silver, mercury, brass with a copper content exceeding 65%) and the salts of these metals; halogens (bromine, chlorine, iodine, fluorine); hydrides (i.e. sodium hydride, cesium hydride); ozone; perchloric acid; potassium.) Reactivity: A) Hazardous Decomposition Products Under normal conditions of storage and use, hazardous decomposition products should not be produced B) Hazardous Polymerization Under normal conditions of storage and use, hazardous polymerization will not occur. Nitrogen is a simple asphyxiate. Irritancy of Material Sensitization to Material Reproductive Effects Mutagenicity Teratogenicity Synergistic Materials Toxicological Information Ecological Information No adverse ecological effects are expected. Acetylene does not have effect on ozone-depleting chemicals. Acetylene is not listed as a marine pollutant. Any adverse effect on animals would be related to Oxygen deficient environments and the anaesthetic properties of Acetylene at high concentrations of exposure. No adverse effect is anticipated to occur to plant- life.
Disposal Consideration Waste Disposal Method: Do not attempt to dispose of residual or unused quantities. For emergency disposal, discharge slowly to the atmosphere in a well-ventilated area or outdoors. Disposal of this product, solutions and any by-products should always comply with the requirements of environmental protection and waste disposal legislation and any regional local authority requirements. This material and its container must be disposed of in a safe way. Empty containers or liners may retain some product residues. Do not puncture or incinerate container. Transport Information DOT/IMO Shipping Name Hazard Class Shipping Label(s) Placard (When required) Special Shipping Information Acetylene, dissolved 2.1 (flammable Gas) Flammable gas Flammable gas. Containers should be transported in a secure position, in a well- ventilated truck. The transportation of compressed gas cylinders in automobiles or in closedbody vehicles can present serious safety hazards and should be discouraged. Ensure vehicle driver is aware of the potential hazards of the load and knows what to do in the event of an accident or an emergency. Other Information Special Precautions Use piping and equipment adequately designed to withstand pressures to be encountered. Use a check valve or other protective apparatus in any line or piping from the cylinder to prevent reverse flow. To prevent cryogenic liquids or cold gas from being trapped in piping between valves the piping shall be equipped with pressure relief devices. NFPA health hazard : 0 - Exposure under fire conditions would offer no hazard beyond that of ordinary combustible materials. NFPA fire hazard (flammability) : 4 - Will rapidly or completely vaporize at normal pressure and temperature, or is readily dispersed in air and will burn readily. NFPA reactivity : 2 - Normally unstable and readily undergo violent decomposition but do not detonate. Also: may react violently with water or may form potentially explosive mixtures with water. ** NFPA (National Fire Protection Association). Fumes and gases produced during welding and cutting processes can be dangerous to your health and may cause serious lung disease. KEEP YOUR HEAD OUT OF FUMES. DO NOT BREATHE
FUMES AND GASES. Use enough ventilation, local exhaust, or both to keep fumes and gases from your breathing zone and the general area. Short-term overexposure to fumes may cause dizziness, nausea, and dryness or irritation of the nose, throat, and eyes; or may cause other similar discomfort. Contaminants in the air may add to the hazard of fumes and gases When two or more gases or liquefied gases are mixed, their hazardous properties may combine to create additional, unexpected hazards. Obtain and evaluate the safety information for each component before you produce the mixture. Consult an Industrial Hygienist or other trained person when you make your safety evaluation of the end product. Remember, gases and liquids have properties which can cause serious injury or death. Final determination of suitability of any material is the sole responsibility of the user. All materials may present unknown hazards and should be used with caution. Although certain hazards are described herein, we cannot guarantee that these are the only hazards that exist.