Annual Refresher

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Annual Refresher
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Laboratory Users Must.

• Read follow guidelines in the Chemical Hygiene
  Plan, Hazardous Communication Manual, the MSDS,
  and Chemical Labels.
• That undergraduates cannot work alone on weekends
  or after-hours
• Never pipette by mouth
• Wash hand arms before leaving lab
• Tie back long hair
• USPSNL has an Occupational Medical Surveillance
  program to monitor your health over long term.
  It is a confidential and voluntary program

3
Chemical Common Sense

• Maintain labels on incoming containers
• Date the chemical bottles as they come in
• Do not remove or deface labels
• Replace torn or defaced labels
• Label secondary containers immediately, even if
  it contains just water

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Chemical Storage

• Store chemicals in compatible groups. Keep acids
  away from bases, and oxidizers away from
  solvents.
• Separate groups in barriers
• Store corrosives below eye level
• In laboratory, store only what you will use
  during the immediate future, limit quantities to
  4 liters and under

5
Chemical Storage

• Use secondary containment (plastic trays or bins)

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Separate incompatible chemicals
The biggest incompatibilities to keep in mind are

• keep oxidizers away from flammables
• keep acids away from bases
• keep acids away from cyanide salts

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Storage of Corrosive

• Storage concerns
• Store strong mineral acids separately from other
  materials
• Use secondary containment if a corrosive storage
  cabinet isnt available
• Store nitric acid separately
• Store perchloric acid separately
• Store organic acids (combustible) with other
  organic/flammable liquids

Keep sodium bicarbonate on hand for spills
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Oxidizers

• Provide a source of oxygen and will initiate or
  promote combustion
• Gases fluorine, chlorine, ozone, nitrous oxide,
  oxygen
• Liquids hydrogen peroxide, nitric acid,
  perchloric acid, bromine
• Solids nitrites, nitrates, perchlorates,
  peroxides, chromates, dichromates, picrates,
  permanganates, hypochlorites, bromates, iodates,
  chlorites, chlorates
• Oxidizers must be stored separately from other
  materials

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Fire started in a trash can with sodium metal
(water reactive) and wet paper towels.
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Heat from burning plastic trash transferred into
metal storage cabinet under sink. Bottle on
right exploded, sheared off tops of other bottles
of flammable liquids. Water pipes broke under
sink, causing flooding.
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Chemical Waste Handling Disposal

• Waste is considered hazardous if it has the
  characteristics of being Ignitable, Reactive,
  Corrosive, and Toxic.
• Containers must be clearly labeled Hazardous
  Waste with one of the above characteristic
  listings on the Cornell EHS label, stored in a
  compatible shatterproof container and set in a
  secondary containment.
• Full containers are taken to G-26, never down the
  drain
• Broken glassware must not be placed with regular
  trash, but in specifically designed boxes to
  contain broken glass, used razor blades,
  scalpels, needles, and syringes. See Kathie Moh
  if need additional boxes.

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Chemical Ordering

• Before ordering new chemicals you should consult
  the central chemical inventory maintained by
  Kathie Moh to see if somebody else have what you
  need.
• Cost disposal of unwanted chemicals as hazardous
  waste continues to mount each year

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Personal Protective Equipment

• Routes of Exposure
• Inhalation
• Absorption through skin
• Ingestion, hence the banning of food and drinks
  in labs
• Injection from glass shards, syringes, used
  razors, etc

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Personal Protective Equipment, cont.

• All lab users and visitors must wear ANSI
  approved eye protection when potential of eye
  injury exist.
• Closed toe shoes of non-woven material with
  non-slip soles
• Lab coats with front clasp
• Gloves
• Check chemical-glove compatibility
• Inspect gloves before use
• Remove glove and wash hands before leaving lab

15
Personal Protective Equipment, cont.

• Lab coats and gloves must be removed before
  leaving the laboratory so not to transfer
  contaminants to another person or laboratory.

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What a spill sees
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Hygiene practices General Rules for Working With
Chemicals

• Do not wear gloves when answering the phone,
  adjusting the radio dial, or using a computer
  used by others
• Hazardous chemicals may be carried through the
  hall with a rubber or plastic bucket
• Do not generate dusts when weighing out powdered
  chemicals
• Recap chemical containers promptly when weighing
  or pouring is completed
• Clean up the area around the balance when
  finished weighing chemicals
• Do not contaminate the exterior of chemical
  containers
• Place chemical containers back in storage when
  finished with a chemical

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Know Where are the Emergency Stations

• Eyewash station
• Emergency Shower
• Fire Blanket
• Spill Control Kit
• First Aid Kit
• Fire Extinguisher/ Fire Alarm.
• AED Units

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Refrigerators Freezers

• Only explosion proof/ safe refrigerators and
  freezers may be used to store flammables
• No Flammable Allowed on refrigerators/freezers
  that are not explosion proof/ safe
• Refrigerator/freezers labeled for CHEMICAL USE
  ONLY or FOOD USE ONLY and used accordingly
• Interior sound and free of chemicals spills or
  contamination

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Electricity Safety

• Electrical apparatus equipped with ground plugs
  or properly grounded
• Two prong appliances not within a 5 foot radius
  or directly located above flammable or sinks
• Extension cords in good conditions (no splices)
• Extension cords for temporary use only, not
  overloaded or longer than 6 feet

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Gas Cylinders

• Installed and leak tested by trained personnel
• Secured in upright position, with cylinder
  clamp/chain fastened for solid support
• Flammable materials stored a minimum of 20 feet
  from cylinders containing oxidizers
• Regulators, proper connections, and tubing in
  good conditions
• Flammable gas tubing secured and labeled
• Flame arrester on flammable gas supply.

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Gas Cylinders must be properly secured

• Good

Not Good - chains too low, it could fall onto
somebody and break bones and/or valve off
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Chemical Fume Hoods

• Do not use fume hood for storage, unless
  specifically for Satellite Accumulation Area
• Maintain sash height as or below posted level
• Do not stack objects against the baffle or else
  air velocity will be interrupted
• Ideally all doors should be closed to maintain
  the negative pressure of the laboratory

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Waste Minimization

• Consider process modification to include product
  substitution, scale reduction, or bench top
  process.
• Incorporate neutralization, precipitation and
  drying, or chemical destruction into your
  procedural protocol

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Youre Done! (after you take the quiz) See you
next year.

• Or go to the next annual refresher