kemikalien

Kemikalien are substances with a defined composition that can be elements or compounds. They may occur naturally, such as minerals and atmospheric gases, or be manufactured synthetically for a wide range of applications. In everyday use the term covers simple substances as well as complex mixtures and polymers. The study of kemikalien includes their structure, properties, reactions, and how they interact with living systems and the environment.

Chemically, kemikalien are broadly divided into inorganic and organic groups. Inorganic examples include minerals, metals, salts, and acids, while organic kemikalien are carbon-based and include fuels, solvents, plastics, and many medicines. Substances may be pure chemicals or mixtures, and hazards depend on reactivity, toxicity, flammability, and environmental persistence.

The production and use of kemikalien are central to the chemical industry, which provides substances for manufacturing, agriculture, health care, consumer goods, and energy. Raw materials are transformed through reactions, separations, and formulations to achieve desired performance and safety.

Safety and regulation govern their handling. Labels and safety data sheets provide hazard information, and international and national rules cover storage, transport, labeling, and disposal to reduce risks to people and the environment. Frameworks such as chemical safety laws and hazard communication aim to ensure responsible use throughout the lifecycle of a kemikalien.

Environmental and health considerations include toxicity, exposure, and pollution. Responsible use emphasizes risk assessment, substitution of hazardous substances where feasible, and waste minimization, recovery, and recycling to support sustainable chemistry.