Glossary

Click on a letter to see an explanation of technical terms beginning with that letter.

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Sources:
Definitions in this glossary have been compiled based on DuPont's experience and technical expertise in protective apparel as well as a number of external sources, including: "Glossary of terms and definitions by the European Committee for Standardisation."

H
Term Explanation
Halogens Halogens is the name of a chemical family which includes fluorine, chlorine, bromine and iodine.
Hazard Situation which can cause harm or damage to the health of the human body.
Hazard Assessment A method to analyse the risks to the human body in the working environment.
Hazardous Chemical A chemical which can cause chronic or acute harm upon exposure.
Hazardous Chemical Emergency Any emergency that involves a hazardous chemical.
Hazardous Material A substance (solid, liquid or gas) capable of posing an unreasonable risk to health, safety, environment or property.
Hazardous Material Emergency An uncontrolled or unexpected release of a hazardous material.
Health and Safety For many years DuPont has been ranked as the world’s number one company for employee safety. As well as sharing its expertise through its Environmental and Safety Services Division, DuPont is keen to go beyond the minimum legal requirements in terms of product safety. For further information on the help and services available, please contact DuPont.
Heat Stress The strain placed on the body as it attempts to cope with excess internal heat.
Heat Transfer Index Index used in EN standards to measure the transfer of radiant (EN 366)) heat through a given material. See also TPP. 
Heavy Metals High-density metallic elements that may demonstrate health hazards as a result of exposure and may contribute to contamination of the environment, including chromium (Cr) ; beryllium (Be) ; lead (Pb) ; mercury (Hg) ; zinc (Zn) ; copper (Cu) ; cadmium (Cd) ; and others.
Homogeneous material Material where the electrical properties of the components (threads, layers) do no differ substantially from each other, or a material which contains an intimate blend of conductive fibres.
Hot Zone An area immediately surrounding a hazardous materials incident that extends far enough to prevent adverse effects from the release of hazardous materials to personnel outside the zone. This area is also referred to as the "exclusion zone," the "red zone" and the "restricted zone" in other documents.
Household Hazardous Waste Hazardous materials, such as paints, pesticides, motor oil and batteries, that require careful storage and proper disposal.
Hydrostatic head This test measures the fabric’s resistance to liquid pressure. Unit : cm/H2O.