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Dirt/Earth

Examples of this absorbent type include soil and dirt. The following categories of chemicals have been known to react (that is, are incompatibleSubstances that react together, if mixed.) with Dirt/Earth:

Category: Hydrazine, Hydrazine Derivatives, and Amines

• Reason for Concern:听These absorb strongly to organic material in dirt, releasing significant amounts of heat. The heat generated by this process can build up and cause the temperature to rise above the absorbed chemical's flash pointThe lowest temperature at which a liquid gives off enough vapor to be ignited at its surface.鈥攑ossibly resulting in a fire or explosionA chemical or physical process in which the rate at which energy is being generated exceeds its ability to escape to its surrounding environment. The hazards of an explosion can include a shock wave (especially near the point of explosion) and projectiles generated by the shock wave.. Hydrazine, many hydrazine derivatives, and many amines are highly flammableEasy to ignite and burns readily. and some are explosive.
• Examples:听Hydrazine; Trimethylamine; Diphenylamine
• Reactive Groups:听Amines, Aromatic; Amines, Phosphines, and Pyridines; Azo, Diazo, Azido, Hydrazine, and Azide Compounds

Category: Hydrofluoric Acid

• Reason for Concern:听Hydrofluoric acid may react exothermically with the silicate structure in these absorbents. Aqueous solutions of other inorganicCompounds that do not contain the element carbon, as well as the following carbon-containing compounds: the carbon oxides, the carbides, carbon disulfide, phosgene, cyanides of metals, and carbonyl sulfide. fluorides could also contain hydrofluoric acid, and so would react similarly with these absorbents.
• Examples:听Hydrofluoric acid; Ammonium bifluoride solution; Sodium fluorosilicate solution; Boron trifluoride diethyl etherate
• Reactive Groups:听Fluoride Salts, Soluble

Category: Reactive Monomers

• Reason for Concern:听Active sites within these absorbents, including impurities, may catalyzeTo act as a catalyst--that is, to speed up a chemical reaction between other substances without itself being chemically changed or consumed. exothermicA chemical reaction that generates heat. Opposite of endothermic, in which heat is taken in from the surroundings., uncontrolled polymerizationChemical reaction in which small molecules join to form larger molecules; polymerization reactions typically release heat, and can cause containers to overpressurize. of monomersOne of the molecules that link together to make a polymer. For example, the monomer of natural rubber is isoprene. Monomers may be naturally occurring or synthetic., leading to a thermal runaway. This could result in a fire or explosion.
• Examples:听Styrene; Divinylbenzene (DVB); Vinylbenzyl chloride (VBC); Epoxide monomers (ethylene oxide, propylene oxide, etc.)
• Reactive Groups:听Acrylates and Acrylic Acids; Conjugated Dienes; Epoxides; Hydrocarbons, Aliphatic Unsaturated; Polymerizable Compounds

Category: Water-Reactive 365bet娱乐

• Reason for Concern:听Dirt听often contains moisture, which could pose a hazard if it is听used to clean up water-reactiveCan react vigorously when mixed with water or steam or when spilled into water; the reaction may generate hazardous gas or overpressurize a container. chemicals. Many water-reactive chemicals release toxicPoisonous; can injure or kill people or other organisms. or corrosiveLiquid or solid that can destroy human skin or lung tissue or corrode metals. gases and generate heat when they come into contact with even small amounts of water.
• Examples:听Methyl isocyanate; Acetyl chloride; Acetic anhydride; Phenyltrichlorosilane
• Reactive Groups:听Acid Halides, Sulfonyl Halides, and Chloroformates; Anhydrides; Chlorosilanes; Halogenating Agents; Isocyanates and Isothiocyanates; Thiocarbamate Esters and Salts/Dithiocarbamate Esters and Salts

Other Absorbent Topics

• General Guidance on Absorbents (Situations to Watch Out For)
• Cellulose-Based Absorbents
• Expanded Polymeric Absorbents
• Mineral-Based and Clay-Based Absorbents
• Sand