What is VOCs from a global perspective?

I. What is VOCs?

    VOCs first appeared in Los Angeles, USA. Located on the West Coast, Los Angeles is surrounded by mountains on three sides and faces the ocean on one side, enjoying year-round sunshine. However, in the 1940s and 1950s, people noticed a frequent bluish smog in the sky at midday or in the early afternoon each summer. Vegetation within a kilometer of the city mysteriously withered, and more residents began to suffer from various eye and respiratory ailments, and even died. In 1955, American scientists discovered that this was a new type of air pollution: large amounts of hydrocarbons and nitrogen oxides emitted by vehicle exhaust and other industrial processes. Under the influence of ultraviolet rays from sunlight, eventually transformed into toxic gases that could cause illness or even death.

   ——Los Angeles photochemical smog incident.

    Volatile Organic Compounds（VOCs） is a general term for volatile organic compounds with low boiling point characteristics, and the definitions of different international organizations are slightly different.

II. What is the definition of VOCs in different countries?  

    According to the World Health Organization (WHO) definition, VOCs generally refer to “all volatile organic compounds with a melting point below room temperature and a boiling point between 50 – 260°C”;

    The U.S. Environmental Protection Agency (EPA) classifies VOCs as “any carbon compound that participates in atmospheric photochemical reactions, excluding carbon monoxide, carbon dioxide, carbonic acid, metal carbides or carbonates, and ammonium carbonate”;

    The European Union (EU) defines it as "organic compounds with a boiling point ≤ 250°C at standard atmospheric pressure";

    According to China's current environmental monitoring standards, "all organic compounds with a saturated vapor pressure ≥10 Pa at 20°C or a boiling point ≤260°C at normal pressure" are collectively referred to as VOCs.

III. Conclusion  

    Although different countries have different definitions of VOCs, these substances generally have multi-component chemical properties. VOCs pose a significant threat to public health and ecological security through complex reaction mechanisms.

    VOCs act like a prism, reflecting the complex interactions between countries' environmental management strategies and monitoring technologies. Understanding these differences and commonalities is the first step in developing targeted waste gas control policies and protecting the air we breathe.

IV. Contact Us  

    Shandong Eco Nova Group focuses on the manufacturing of environmental protection equipment such as VOCs Concentrator, Waste Gas Treatment, Waste Water Treatment, Chemical Reactor, and Fine Chemical EPC. We provide one-stop solutions covering design, manufacturing, and engineering delivery for the entire industry, and serving global customers with its outstanding technical strength.

    Now we sincerely invite colleagues in the industry to work together to develop a new future of green industry!