Laboratory Safety
dangerously reactive material
(old WHMIS symbol)
lower
Does a lower or higher hazard number mean that the product is more dangerous
identification, hazard identification, composition, first aid, fire-fighting, accidental release, handling, storage, personal protection, physical/chemical properties, stability/reactivity, toxological information, ecological information, disposal, transportation, regulatory information
Name a few of the sections that the SDS is divided
hair
________ should be tied back so that it does not become part of your experiment
viscosity
a measure of a liquid's resistance to flow; high when fluid is thick
vapour pressure
a measure of how much a substance can accumulate as vapour above the liquid or solid
carcinogen
a mutagen may also be a ____________
asphyxiant
a substance that reduces or displaces the normal oxygen concentration in breathed air; can cause unconsciousness or death by suffocation
high
a substance with a low boiling point will always have a __________ vapour pressure producing a vapour hazard
immediately
all spills should be cleaned up _____________
category 1
category considered to be the most hazardous within a class
Physical Hazards
class that represents hazards related to the physical and chemical properties of a product such as its flammability, reactivity or corrosivity to metals
environmental hazards
class that represents hazards to aquatic environments
health hazards
class that represents hazards to health arising from exposure o a substance or mixture such as acute toxicity or skin sensitization
closed
containers or bottles of liquids to be stored in the lockers must be _____________
persistence
describes a substance that does not degrade into small inorganic molecules
SDS
documents that provide detailed information about a chemical, more than the product label
chronic aquatic toxicity
environmental hazard that covers products that cause adverse effects to aquatic organisms during exposures that are determine in relation to the life cycle of the organism
acute aquatic toxicity
environmental hazard that covers products that cause injury to an aquatic organism in a short term exposure
pictograms
graphic images that immediately depict what type of hazard a product depicts
acute toxicity
health hazard that covers products that are fatal, toxic, or harmful if inhaled, following skin contact or if swallowed; could be due to direct contact with product or due to product coming into contact with water and releasing a gaseous substance
skin corrosion
health hazard that covers products that cause severe skin burns or irritation
aspiration hazard
health hazard that covers products that may be fatal if they are swallowed and enter the airways
respiratory sensitization
health hazard that covers products that may cause allergies or asthma symptoms or breathing difficulties if inhaled
skin sensitizer
health hazard that covers products that may cause an allergic skin reaction
carcinogenicity
health hazard that covers products that may cause cancer
target organ toxicity
health hazard that covers products that may cause damage to organs following prolonged or repeated exposure
germ cell mutagenicity
health hazard that covers products that may cause genetic defects to body cells that can be passed onto future generations
reproductive toxicity
health hazard that covers products that may damage fertility or the unborn child
biohazardous infectious materials
health hazards that covers microorganisms, nucleic acids, or proteins that cause infection with or without toxicity within humans or animals
15-20
how many minutes should reagents be washed off with water for after coming in contact with the skin
turn off source
if a fire occurs in the lab what is the first step that should be taken
1.0
if a substance has a density of less than ________ the substance will float on water
pH
indicates if the substance is acidic or basic or neutral
16
number of sections that the SDS is divided into
under pressure
physical hazard class that covers products that are compressed gases, dissolved gases, and refrigerated liquefied gases that may explode if heated or may be so severely cold that they cause burns
combustible dust
physical hazard class that covers products that are finely divided solid particles, that if dispersed in air may catch fire or explode if ignited
corrosive
physical hazard class that covers products that can chemically damage or destroy metals
pyrophoric
physical hazard class that covers products that catch fire quickly and spontaneously if exposed to air
flammable
physical hazard class that covers products that have the ability to ignite easily and their main hazards are fire or explosions
self reactive
physical hazard class that covers products that may cause a fire or explosion or their own, possibly when heated
oxidizing
physical hazard class that covers products that may cause or intensify a fire or cause a fire or explosion
simple asphyxiants
physical hazard class that covers products that may displace oxygen in air and cause rapid suffocation
self heating
physical hazard class that covers products that will ignite only after being exposed to air for a long period of time or in large amounts
carcinogen
refers to a substance capable of causing canceer in living tissue
irritant
refers to a substance that aggravates tissue
mutagen
refers to a substance that can induce or increase the rate of frequency of permanent genetic mutations in an organism
pyrophoric
refers to a substance that ignites spontaneously when it comes in contact with air (and often also water)
teratogen
refers to a substance that interferes with the development of an embryo or fetus and may cause birth defects of end a pregnancy
acute exposure
refers to exposure occuring over a short period of 24 hours or less
chronic exposure
refers to repeat exposures occurring over a long period of time
LC50
refers to the concentration of chemicals in the air that kill 50% of test animals over a set period of time
flammability limits
refers to the concentration range of vapours in which a flammable substance can produce a fire or explosion when an ignitions source is present
vapour density
refers to the density of a substance compared to air
specific gravity
refers to the density of the substance compared to water
odour threshold
refers to the level in parts per million at which most people will be able to smell the substance
bioaccumulative potential
refers to the likelihood that a substance can be absorbed into an organism and accumulate at a rate greater than which the substance is removed from the body (pass through the food chain)
lower flammability limit
refers to the lower end of the concentration range below which the mixture lacks sufficient amount of flammable substance to burn
flash point
refers to the lowest temperature at which a given liquid gives off sufficient vapour to ignite the air in the presence of an ignition source
auto-ignition temperature
refers to the lowest temperature at which a substance will spontaneously ignite in a normal atmosphere without an external source of ignition
ecotoxicity
refers to the potential for a substance to cause stresses on the ecosystem by its level of toxicity on aquatic or terrestrial organisms
mobility in soil
refers to the potential of a substance, if released to the environment to move under natural forces to the groundwater or to a distance from the site of release
partition coefficient
refers to the ratio of the concentration of a solute in two immiscible or slightly miscible liquids; measure in solubility of the compound in each liquid
evaporation rate
refers to the speed at which a liquid or solid turns into a vapour; higher means more vapour hazard
LD50
refers to the standard measure of acute toxicity stated in milligrams of substance per kg of body weight and the value represents the individual dose required to kill 50% of a population
boiling point
refers to the temperature at which a liquid boils
decomposition temperature
refers to the temperature at which a substance chemically decomposes breaking into elements or simpler compounds
upper flammability limit
refers to the upper end of the concentration range, above this, the mixture contains too much substance and too little oxygen to burn
loose
should pants worn in the lab be tight or loose fitting
fume hood
storage bottles for all organic wastes or heavy metal ion wastes can be found under the _______________
greater
the lower the flash point, the _______________ the fire hazard
7
the number of the assembly area for S269 found by going down the stairs at the middle of the building
water
to treat minor burns, soak the injury in __________
false
true of false, unused materials that were obtained from their container for the lab may be returned as to not waste them
false
true or false, a product will only have one pictogram on their label and SDS
true
true or false, backpacks are not allowed at the lab bench, only bring your notebook with you
false
true or false, eating, drinking, or chewing gum in the lab is allowed at some times
true
true or false, every chemical should be considered potentially hazardous because they are ALL dangerous if entered into the body
true
true or false, headphones are banned from the lab
false
true or false, it is okay for a student to have parts of their legs exposed as long as they are wearing closed shoes and a lab coat
true
true or false, there are no situations in the lab in which safety goggles and lab coats may not be worn
dilute
waste liquids in the form of __________ acids or bases may be washed down the sink with large quantities of water
physical, health, environmental
what are the three types of hazard groups in the new WHMIS 2015
wash hands
what is the last thing that you must do before leaving the lab
taste
what is the one sense that is NEVER used in the lab
spill kit
what must be used to clean up concentrated acids and bases if they are spilled
wafting
what technique should be used to smell a chemical
1A
what would be more hazardous, category 1A or category 1B
sink; low
when a substance has density below 1.0 it will _____________ in air and concentrate in __________ areas
garbage
where should solid waste be disposed of unless otherwise informed
danger
which signal word is more severe, danger or warning
closed toe
which type of shoes must be worn in the lab
mouth
while heating substances in a test tube, care should be taken that the _____________ of the test tube is not aimed at anyone