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To identify the contents of a rail car, check for:

Documents

• Train consist. This document is carried by the conductor or engineer, and also should be in the railroad's computer system. The consistA document showing the current positions of cars in a train and their cargo, including hazardous materials. lists all cars in the train and the current positions of cars carrying hazardous materials.
• Waybills. A waybillDocument accompanying a shipment, containing instructions for handling the shipment, description of the shipment, shipper and consignee information, and other details. is issued for each rail car. It lists the shipper, consigneePerson (or business) to whom a shipment is sent., and car contents. Waybills should be kept by the conductor.

Markings

• Stenciled name. For certain chemicals, the name of the hazardous material in the rail car is stenciled on both sides in 4-inch-high letters. As this stenciled name shows, this tank car carries liquefied petroleum gas (LPG).
  
• Placards. DOT placards on the rail car听indicate the substance's main hazard and may also display the UN/NA numberUnited Nations-North American number. (Also UN number or DOT number.) Four-digit number identifying an individual chemical or group of chemicals with similar characteristics. Required on shipping papers; often shown on placards. The four-digit number is often preceded by UN (such as UN1219).. Look for identical, diamond-shaped placards on the front, rear, and both sides of the rail car. Sometimes the UN/NA number is included on the placard (or on an orange panel just below it). However, note that placards may be missing, and tanks may be incorrectly placarded.
  
• Reporting marks. Each rail car is identified by a unique reporting mark: a combination of letters followed by numbers that is stenciled on both sides and both ends of the car. The sequence of letters identifies the railroad or company that owns the car, and the sequence of numbers identifies the car. As you face the side of the car, the reporting mark is to your left. You can call a car's reporting marks into CHEMTREC (800-424-9300) to identify the car's owner and鈥攅ventually鈥攊ts contents. The reporting mark on this rail car is indicated on the picture by the red oval.
  
• DOT tank car specification markings. These markings (on both sides of the car) identify the class of tank car, which tells you what it could be carrying. The first sequence of numbers (111 in the example below) tells you the car's class: non-pressure, pressure, high pressure, or cryogenicVery low temperature..
  

Once you have听found identifiers for the chemical, you can look up its datasheet in CAMEO 365bet娱乐.

• Typically carries pressurized flammableEasy to ignite and burns readily. gases (e.g., propane or liquefied petroleum gas), poisonous gases (e.g., chlorine, sulfur dioxide, or vinyl chloride), or nonflammableDifficult to ignite. gases (e.g., argon or carbon dioxide).
• Includes car classes DOT105, DOT109, DOT112, DOT114, and DOT120.
• Round in cross section. Capacity up to 33,500 gallons; pressure 100鈥�600 psiPounds per square inch; a unit of pressure measurement.. Generally steel or aluminum.
• Closed dome only on top. A cylindrical protective housing at top of car encloses valves and piping. Most tank cars carrying pressurized flammable gases are insulated.

• Typically carries chemicals such as combustibleCan be ignited and burned. or flammableEasy to ignite and burns readily. liquids (e.g., gasoline or fuel oil), corrosivesLiquid or solid that can destroy human skin or lung tissue or corrode metals., oxidizersOr oxidizing agent. A material that can cause or enhance the combustion of other materials, usually by providing oxygen., organicGenerally, compounds that contain the element carbon, except for some carbon-containing compounds that are considered to be inorganic (carbon oxides, carbides, carbon disulfide, phosgene, the cyanides of the metals, and carbonyl sulfide). peroxides, slurries, poisons, or food liquids (e.g., juice, tomato paste, or tallow).
• Cannot transport substances classified as inhalationA route of chemical exposure in which a toxic material is brought into the bloodstream as particles or volatile compounds breathed into the lungs and nasal passages. hazards in the Hazardous Materials Table (49 CFR 172.101).
• Includes car classes DOT103, DOT104, DOT111, DOT115, AAR201, AAR203, AAR206, and AAR211.
• Round in cross-section. Capacity up to 30,000 gallons. May be compartmentalized and/or insulated. Pressure can be up to 100 psiPounds per square inch; a unit of pressure measurement..
• Valves and fittings are exposed. Often, a small dome cover is located at the top of the car, but relief valves and piping are outside of this cover.

• Carries gases (such as oxygen, helium, hydrogen, and nitrogen) in high-pressure cylinders.

• Typically contains gases liquefied by refrigeration, such as liquid hydrogen and nitrogen.
• Includes car classes DOT113, AAR204W, and AAR204XT.
• Pressure within tank is low; temperature is -130掳F or below. Tank is generally double walled and insulated. Test pressures from 60鈥�175 psiPounds per square inch; a unit of pressure measurement..
• Valves and fittings are enclosed in a cabinet at the lower side or end of the car.

• Typically contains dry bulk chemicals (such as calcium carbide, sodium chlorate, ammonium nitrate, and lime); may also contain sand, gravel, fertilizers, and plastic pellets.
• Hopper cars may be covered or open top.

• Typically contains mixed cargo, which may be packed in bags, boxes, drums, tanks, cylinders, liquid bladders, or other containers. Check labels and tags on individual containers to identify their contents. See also Drums and Portable Containers Guide.
• Car class AAR204XT is a box car carrying a cryogenicVery low temperature. tank.