Hazards Flashcards
Refers to anything that can cause disease in humans, regardless of its source
Biohazards
This hazard include infectious agents, contaminated solutions, specimens or objects
Biohazard
Chemicals that cause reversible inflammatory effects at the site of contact with living tissue, especially the skin, eyes and respiratory passages
Irritants
Cause destruction or irreversible alterations when exposed to living tissue, or destroy certain inanimate surfaces
Corrosive chemical
Cause allergic reactions in a substantial proportion of exposed subjects, not just in hypersensitive individual
Sensitizers
Substances that induce tumors, not only in experimental animals but also in humans
Carcinogens
Capable of causing death by ingestion, skin contact or inhalation at certain specified concentrations
Toxic materials
Physical hazard
Combustibles
Flammable
Explosive
Oxidizers
Substances that ignite at or above a certain temperature or flash point at which vapors will ignite in the presence of an ignition source
Combustible
OSHA defines Flash point as
100F or 38C
Department of Transportation defines flash point at
141F or 60.5C
Substances that have flash point below the temperature specified by OSHA and DOT, but require especially designed storage rooms
Flammable
Chemicals including picric acid. Solutions that may explode upon aging, which is why they should never be stored after use
Explosive
Harmless by themselves but may initiate or promote combustion and present a serious fire risk when in contact with certain substances
Oxidizers
Terms used to define the maximum allowable airborne concentration of a chemical to which worker may be exposed
PEL - permissible exposure limits
TLV-threshold limit values
OEL - occupational exposure limits
Basic informations included in the label
Chemical name and all ingredients Manufacturer's name and address Date purchased or made Expiration date Hazard warnings and safety procedures
Best stored below countertop height to minimize the risk of bodily exposure in case a bottle is dropped and broken
Dangerous liquids
Stored in plastic or plastic coated glass bottles
Dangerous reagents
Never stored in a refrigerator or freezer unless these appliances are certified as suitable for an explosive atmosphere
Flammable liquids
Most common disinfectant for biohazards
Bleach or sodium hypochlorite
Disinfectant for acids
Baking soda
Disinfectant for alkaline
Vinegar of 5%acetic acid
Controlled range of water temperature
15-35C
Affected eyes and skin should be rinsed for how long
15-30mins
Infectious agent that can not be destroyed by complete penetration of alcohol
Prions
Prions can cause
Creutzfeld Jakob disease
Scrapie
Mad cow disease
Decontamination of tissue with prions
Immerse in formalin for 48hrs, treatment in concentrated formic acid for 1hr and additional formalin fixation for 48hrs
Health hazards
Biohazards Irritants Corrosive chemicals Sensitizers Carcinogen Toxic materials