Flammable solids class 4.3

The hazard classes recognized by the DOT are Class 1, Explosives Class 2, Compressed Gases Class 3, Flammable Liquids Class 4, Flammable Solids Class 5, Oxidizers Class 6, Poisons Class 7, Radioactives Class 8, Corrosives and Class 9, Miscellaneous Hazardous Materials. Class 1 Explosives are subdivided into six subclasses 1.1 through 1.6. Class 2 Compressed Gases have three... 

DOT Label Flammable Solid, Class A Explosive (dry solid) CAS [9004-70-0]... 

For small stores, quantity limits up to which storage is allowed have been set for several classes. Typical limits are in the range up to 200 kg. For some classes, however, e.g., explosives (class 1), compressed, liquefied, and dissolved gases (class 2 A), flammable solids (class 4.1 A), infectious substances (class 6.2), or radioactive substances (class 7) there are no allowances. 

Chapter 6 Flammable Solids Class 4.1 Flammable Solids Flash-Point Solids/Snblimation Combnstible Dnsts Class 4.2 Spontaneons Combnstibles Spontaneons Ignition Pyrophoric Solids and Liqnids Incidents... 

While this book does not cover shock-sensitive powders, such as primary explosives, UN-DOT Class 4.1 Flammable Solids are within its scope. These include thermally unstable powders that can both deflagrate in an oxidant and decompose in bulk. Examples include some nitrogen blowing agents. Should ignition occur at any point, a propagating decomposition... 

Hazard Class A series of nine descriptive terms that have been established by the UN Committee of Experts to categorize the hazardous nature of chemical, physical, and biological materials. These categories are flammable liquids, flammable solids, explosives, gases, oxidizers, radioactive materials, corrosives, poisonous and infectious substances, and dangerous substances. 

Although the transport of dry lead picrate is forbidden by the Department of Transportation (DOT) (49 CFR 172.101), the addition of water desensitizes it. No hazard classification is available from DOT for wetted lead picrate, but silver picrate, which is similar in sensitivity, may not be shipped when dry but is classified as a flammable solid (Hazard Class/Division 4.1) when it is wetted with water by at least 30 percent by mass. 

Multipurpose dry chemical extinguishers (20-A 80B-C) should be provided in warehouses and shop buildings where wood, paper, plastics, and other flammable solids, as well as flammable liquids, may be stored. In grease manufacturing and compounding or similar operations where little or no wood, paper, and similar combustibles are stored, but where flammable liquids may be prevalent, potassium bicarbonate dry chemical extinguishers should be used. Extinguishers should be located not more than 75 ft (23 m) away from any potential Class A fire hazard and not more than 50 ft (15 m) from Class B fire hazards. 

Most fuels and oils are classified as Flammable Liquids. Occasionally Gas samples and Flammable Solids are shipped. Further details describing each of the nine hazard classes are provided in TABLE 10-1. 

Class 4 Flammable Solid Spontaneously combustible material and Dangerous when wet material... 

Hazard Class 4 - Division 4.1. Flammable Solids (These include but are not limited to self-reactive materials which are materials that are liable to undergo at normal or elevated temperatures a strong exothermic decomposition caused by excessively high handling temperatures or by contaminattion,, and readily combustible materials which may cause a fire through friction) ... 

Because of its extreme chemical reactivity, calcium metal must be carefully packaged for shipment and storage. The metal is packaged in sealed argon-filled containers. Calcium is classed as a flammable solid and is nonmailable. Sealed quantities of calcium should be stored in a dry, well-ventilated area so as to remove any hydrogen formed by reaction with moisture. 

Calcium carbide is classed as a hazardous chemical under Department of Transportation regulations. Domestic shipments are mainly in steel tote bins varying in capacity from 2.5—4.5 t. A small amount continues to be shipped in industrial wide mouth sted drums of 270 kg capacity. Containers must be marked "Flammable solid, dangerous when wet" and have the United Nations designation UN 1402. 

Portable fire extinguishers are classified according to applicability Class A for solid combustibles Class B for flammable liquids Class C for electrical fires that require a nonconducting agent and Class D for combustible metals. Water frequently is used for Class A extinguishers bicarbonates for Class B and Class BC carbon dioxide or Freon for Class C ammonium phosphate for Class ABC and powdered salt, sodium chloride, for Class D. 

Flammable solid may ignite in moist air. Do not use water, carbon dioxide, dry chemical, or halogenated extinguishers. Extinguish frre by smothering with dry sand or class D extinguisher.2... 

The U.N. classification scheme defines flammable solids as solids, other than those classed as explosives, which under conditions encountered in transport are readily combustible, or may cause or contribute to fire through friction. The category includes self-reactive substances and wetted explosives. 

OSHA PEL TWA 0.5 mg(Ba)/m3 ACGIH TLV TWA 0.5 mg(Ba)/mh Not Classifiable as a Human Carcinogen DFG MAK 0.5 mg(Ba)/m3 DOT CLASSIFICATION EXPLOSIVE I.IA Label EXPLOSIVE I.IA, Poison (UN 0224) DOT Class 4.1 Label Flammable Solid, Poison (UN 1571) SAFETY PROFILE A poison. Moderate explosion hazard when shocked or heated to 275°. Spontaneously flammable in air. Very unstable. When heated to decomposition it emits toxic fumes of NOx. See also... 

DOT CLASSIFICATION 6.1 Label Poison (UN 1566) DOT Class 6.1 Label Poison, Flammable Solid (UN 1567)... 

DOT CLASSIFICATION 4.3 Label Dangerous When Wet (UN 2950) DOT Class 4.1 Label Flammable Solid (UN 1869) DOT Class 4.3 Label Danger When Wet, Spontaneously Combustible SAFETY PROFILE Inhalation of dust and fumes can cause metal fume fever. The powdered metal ignites readily on the skin causing burns. Particles embedded in the skin can produce gaseous blebs that heal slowly. 

DOT CLASSIFICATION 4.2 Label Spontaneously Combustible (UN 1382) DOT Class 8 Label Corrosive (UN 1847) SAFETY PROFILE Poison by ingestion and inhalation. Emits H2S in contact with acids steam. A flammable solid. Unstable may explode on percussion or rapid heating. Ignites on contact with nitrogen oxide. Reacts with H2O to form KOH and KSH. When heated to decomposition it emits very... 

DOT CLASSIFICATION EXPLOSIVE LID Label EXPLOSIVE LID (UN 0214) DOT Class 4.1 Label Flammable Solid -(UN 1354)... 

Class 4 Flammable solids Red/white stripes Flame... 

Hazard class means the nature of the physical, health or environmental hazard, e.g. flammable solid, carcinogen, oral acute toxicity ... 

A flammable solid is classified in one of the two categories for this class using Method N.l as described in Part III, sub-section 33.2.1 of the UN Recommendations on the Transport of Dangerous Goods, Manual of Tests and Criteria, according to the following table ... 

Clinical laboratories deal with each of the nine classes of hazardous materials. These are classified by the United Nations (UN) as (1) explosives, (2) compressed gases, (3) flammable liquids, (4) flammable solids, (5) oxidizer materials, (6) toxic materials, (7) radioactive materials, (8) corrosive materials, and (9) miscellaneous materials not elsewhere classified. Shipping and handling of Class (6) toxic materials,... 

Flammable Solids and Other Class Four Reactive Materials Hazards of flammable solids and mitigation procedures for incidents. Chemical Manufacturers Association, 1991. 

P.A.S.S. (Pull - Aim - Squeeze - Sweep). Fire extinguishers are rated for the types of fires they are effective against. Class A is used for ordinary flammable solids, such as wood and paper Class B is used for flammable liquids, such as grease, oil, and gasoline Class C is used for electrical fires and Class D is used for flammable metals. 

BARIUM SULFIDE (21109-95-5) BaS Flammable solid. Oxidizes in dry air. Contact with acid, acid fumes, moisture, steam, or moist air causes decomposition with the formation of toxic and flammable hydrogen sulfide gas. Evolved gas can form explosive mixtures with air and may cause spontaneous ignition or explosion. Violent reaction with strong oxidizers, calcium chlorate calcium nitrate chlorine dioxide phosphorus(V) oxide strontium chlorate strontium nitrate. Incompatible with lead dioxide, potassium chlorate, potassium nitrite may explode at elevated temperatures. On small fires, use smothering quantities of dry chemical powder, dry clay, dry groimd limestone (CaCOj), dry soda ash,dry sand or approved Class D extinguishers, do not use water, foam, or hydrous agents. 

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