Tim Styranec, Chemical Storekeeper Flammables/Combustibles and
Flammables/Explosives Safety Instruction Slide 2 Safety Instruction
and Review Sign In Sheet Review Protective Equipment Lab coats,
gloves, goggles Waste- red cans, waste forms Safety &
Emergency- EOHS (x3700), 911 Spill response kits Slide 3 LAW Review
OSHA Lab Standard Occupational Health and Safety Plan Last year
MSDS. This session concentrates on class of chemicals-
Flamm/Combustible and explosives. Large quantities used in Organic
labs and Research Slide 4 Purpose of session - to learn about
developing good safety habits when working with
flammable/combustible and explosive materials. NFPA LABEL - RED
4-0- Show example Acetone. FLAMMABLE can be described simply as a
substance that will readily catch fire and burn. Flash point below
100 degree F. COMBUSTIBLE- flash point above 100 F.(difference
important DOT reg. And shipping) same to us. Flash Point - minimum
temp. of liquid at which it gives off vapors sufficient to form an
ignitable mixture with the air near the surface of the liquid or
container. It is by far the most important property concerned with.
Where get this - MSDS, LABEL Flammable Range- Lower Flammable
Limits is the minimum percentage of vapor to air required for
ignition.(too lean) Upper Flammable Limits is the Percentage of
vapor to air above which ignitionis no longer possible.(too rich)
Slide 5 Beware of all Organic Liquids Just because a flash point
may be high it does not take it out of the range of hazardous
material. Example: Kerosene fp 100F can be just as dangerous as a
flammable liquid just a few degrees lower. Slide 6 Flammability
Substance will sometimes ignite but other times will not burn.
Depends on 1. temperature of substance 2. concentration of that
substance in the atomsphere 3. other criteria. - fire triangle -
Energy, Oxidizer, FUEL - (Flammable) 3 things necessary to have a
fire - fuel -oxygen heat. Slide 7 FIRE TRIANGLE FIRE TRIANGLE - as
long as the triangle is not complete, the legs are not touching to
form a closed or completed triangle It is impossible to have a
fire. Want to control in this case - fuel. Slide 8 Flammable
Liquids Flammable Liquids - FUEL Types we work with- organics labs
and research. Hydrocarbons - Pure compounds as well as mixtures.
Pentane, hexane, heptane, decane, benzene, toluene xylenes,
cyclohexan, Cycloheptane etc. Alcohols - R-OH, ethanol,
methanol,propyl,butyl, Ethers - usually flash point is lower, makes
it more dangerous. R-O-R' can become oxidized in unusual and
unexpected way Oxygen atom may enter the molecule to form Peroxide
R-O-O-R' Which is potentially explosive. DO not open cans - if not
sure how long stored. Return for disposal. RULE: once opened it
should be used completely or disposed of. Do not store. If must
DATE can. Ex. Diethyl ether, methyl ethyl ether, isopropyl ether.
Slide 9 Flammable Liquids Ketones Flash point is generally higher.
Used as solvents Ex. - ACETONE,( also called Dimethyl ketone,
2-propanone), Methyl butyl ketone, (2- Heaxanone) and methyl ethyl
ketone.(2-Butanone) Aldehydes -Flash point similar to Ketones. Ex.
Formaldehyde, Acetaldehyde Amines - Considered derivatives of
ammonia. Most foul-smelling, all toxic to some degree and all have
relatively low flash points. Smell of Rotting flesh due to the
formation of amines. Ex. Butyl amine, ethyl amine, diethyl amine
Esters - Distinctive pleasant odors. Common esters - methyl
formate, Methyl acetate, vinyl acetate, ethyl acetate. Slide 10
Beware of all Organic Liquids. Once again - Beware of all Organic
Liquids. Even though a strict definition of combustible liquid
might not include liquids with flash points above 200 degrees F.
Slide 11 Flammable Solids - Carbon based -coal, Phosphorus (white),
Metals Aluminum, Magnesium Picric Acid - also an explosive Slide 12
Compressed Gases- Acetylene- flammmable range is from 2.5 to 83
percent. Every time released in flammable range. Hydrogen - - these
gases have same hazards as other flammables but now Under pressure
Always check MSDS, now in folder in each room. If not let me know.
Slide 13 Explosives- Definition: any material or device that is
created specifically for the purpose of exploding which it will do
upon demand. Definition eliminates all materials that will explode
but were not created or designed to function that way Slide 14
Materials that will explode under certain conditions Materials that
will explode under certain conditions - Increases in Temperature-
Decompose quickly Become dangerously reactive Light mechanical
shock can begin reactions Certain chemicals when mixed Slide 15
Other Dangers Chemicals impurities ( organic peroxides - from
Ether) Ammonium Nitrate Organic Peroxides- Ether forms peroxides
unstable Natural gas Flammable gases Vapors of flammable and
combustible liquids Metal and organic powders Monomers- simple,
small molecule that has capabiltiy of reacting with itself to form
giant molecule called a polymer. Slide 16 Safety Hazards associated
with Flammable/Combustibles and explosives Read the MSDS protective
equipment - what to wear, how stored, how to handle properly and
safely, PELs, signs and symptoms of exposure. If need additional
information my office(ext. 3665) or EOHS. Read Labels - You are
only person who can make the area you work safe as possible. Slide
17 VIDEO - Flammable & Explosives QUIZ Flammables Xylene
example Flash point Limits - Flammability - too lean, too rich
Toxic Limits Ignition Temp. Ethyl Ether- hot plate NO OPEN FLAME OR
HOT PLATE Use Heating Mantle or Water Bath MSDS- Fp and Ignition
temp Static Electricity Adequate Ventilation Flashback - use
arresters Slide 18 Storage and Cleanup Secondary Containers Storing
- Flammable Cabinets no direct sunlight Label Avoid bench top and
hood storage Liter or more store in Flamm. Cabinet - here all
flammable in cabinet Gases - not color coded - Read MSDS Clean up -
EOHS- we do not fit of want to use respirators. Vermiculite- does
not absorb vapors CLEAN UP call me, and I will contact EOHS. Slide
19 Explosives-Know what you are working with MSDS Shock, catalyst
Impurities Organic Peroxides - unstable Date Ether Container - look
for contaminant Slide 20 Fire - What to do Fire - What to do (get
out) RRescue AAlarm CClose Door EExtinguish. - Exit Slide 21 If
feel can extinguish - PPull the pin AAim Ssqueeze the handle SSweep
Slide 22 PLAN When working with Dangerous chemicals - Take time
PLAN QUESTIONS
