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Flammable aerosol (OSHA)

"...any non-refillable receptacle containing a gas compressed, liquefied, or dissolved under pressure, and fitted with a release device allowing the contents to be ejected as particles in suspension in a gas, or as a foam, paste, powder, liquid, or gas." OSHA considers aerosols to be flammable if they meet the definition at 29 CFR 1910.1200 B.3.2.2.

Health hazard (OSHA)

"...means a chemical which is classified as posing one of the following hazardous effects: acute toxicity (any route of exposure); skin corrosion or irritation; serious eye damage or eye irritation; respiratory or skin sensitization; germ cell mutagenicity; carcinogenicity; reproductive toxicity; specific target organ toxicity (single or repeated exposure); or aspiration hazard.." This definition refers to the Hazard Communication Standard at 29 CFR 1910.1200. ALSO SEE: CLASSIFICATION, HAZARD CATEGORY, HAZARD CLASS, HAZARDOUS CHEMICAL.

Flammable liquid (OSHA)

"...means any liquid having a flashpoint of not more than 93°C (199.4°F)." ALSO SEE: FLASHPOINT, COMBUSTIBLE LIQUID.

Foreseeable emergency (OSHA)

"...means any potential occurrence such as, but not limited to, equipment failure, rupture of containers, or failure of control equipment which could result in an uncontrolled release of a hazardous chemical into the workplace." This definition refers to 29 CFR 1910.1200 (b)(2): "This section applies to any chemical which is known to be present in the workplace in such a manner that employees may be exposed under normal conditions of use or in a foreseeable emergency."

Flashpoint (OSHA)

"...means the minimum temperature at which a liquid gives off vapor in sufficient concentration to form an ignitable mixture with air near the surface of the liquid, as determined by a method identified in Section B.6.3" of OSHA's Hazard Communication Standard at 29 CFR 1910.1200. ALSO SEE: FLAMMABLE LIQUID..

Flammable gas (OSHA)

"...means: a gas having a flammable range with air at 20°C (68°F) and a standard pressure of 101.3 kPa (14.7 psi)." ALSO SEE: FLAMMABLE LIMITS, LFL, UFL.

Hazard statement

"means a statement assigned to a hazard class and category that describes the nature of the hazard(s) of a chemical, including, where appropriate, the degree of hazard." This definition refers to OSHA's Hazard Communication Standard at 29 CFR 1910.1200. ALSO SEE: HAZARD CATEGORY, HAZARD CLASS.

Hazard not otherwise classified (HNOC) (OSHA)

"means an adverse physical or health effect identified through an evaluation of scientific evidence during the classification process that does not meet the specified criteria for the physical and health hazard classes addressed in this section. This does not extend coverage to adverse physical and health effects for which there is a hazard class addressed in this section, but the effect either falls below the cut-off value/concentration limit of the hazard class or is under a GHS hazard category that has not been adopted by OSHA (e.g., acute toxicity Category 5)." This definition refers to the Hazard Communication Standard at 29 CFR 1910.1200.

Hazardous chemical (OSHA)

"means any chemical which is classified as a physical hazard or a health hazard, a simple asphyxiant, combustible dust, pyrophoric gas, or hazard not otherwise classified." This definition refers to the Hazard Communication Standard at 29 CFR 1910.1200. ALSO SEE: HAZARD COMMUNICATION STANDARD, CLASSIFICATION, HEALTH HAZARD, PHYSICAL HAZARD.

Hazard class (OSHA)

"means the nature of the physical or health hazards, e.g., flammable solid, carcinogen, oral acute toxicity." This definition refers to the Hazard Communication Standard at 29 CFR 1910.1200. ALSO SEE: CLASSIFICATION.

Flammable solid (OSHA)

(OSHA)—"...means a solid which is a readily combustible solid, or which may cause or contribute to fire through friction.".

Hazard category (OSHA)

(OSHA)—"means the division of criteria within each hazard class, e.g., oral acute toxicity and flammable liquids include four hazard categories. These categories compare hazard severity within a hazard class and should not be taken as a comparison of hazard categories more generally." This definition refers to the Hazard Communication Standard at 29 CFR 1910.1200.

Hepatotoxins

Chemicals which cause liver damage such as liver enlargement or dysfunction. Examples include nitrosamines and carbon tetrachloride.

FIFRA

Federal Insecticide, Fungicide, and Rodenticide Act.

HMIS

Hazardous Materials Identification System. This is an integrated approach to working with hazardous materials. The system includes information on assessing hazards, labeling and training. It was devised by the National Paint and Coatings Association.

Gas, flammable

SEE FLAMMABLE GAS.

Hazardous Materials Identification System

SEE HMIS

Hematopoietic system

The means by which blood cells are produced in the body. ALSO SEE: BLOOD AGENTS.

Hazard Communication Standard

The purpose of OSHA's Hazard Communication Standard, also known as HCS or HazCom, is to address the issue of classifying the potential hazards of chemicals and to ensure that employers and employees can identify and understand hazardous chemicals in the workplace, the physical and health hazards associated with them, and how to take protective action. Hazard communication is achieved by recognition and evaluation of workplace hazards, accurate labeling of hazards, and effective training of employees about proper handling and use of those hazardous materials in the workplace. The OSHA Hazard Communication Standard describes how employers are to inform employees of workplace chemical hazards. The OSHA standard is enforced under the regulations found in 29 CFR 1910.1200. ALSO SEE: RIGHT TO KNOW.

Flammable limits

The range defined by the lower (LFL) and upper (UFL) flammability limit. May sometimes be referred to as explosive limits (LEL & UEL) in other sources of information. This is the range of concentrations in air that may readily ignite when exposed to a flame or spark. ALSO SEE: LFL, UFL.


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