BACK OFF! GET YOUR OWN ACID

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BACK OFF! GET YOUR OWN ACID.as long as you know
where to put it back!

• Science 1206

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WHMIS
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What is WHMIS?

• Stands for Workplace Hazardous Materials
  Information System
• Information is provided by product labels, MSDS
  and worker education programs
• Controlled products is the name given to
  products, materials, and substances regulated by
  WHMIS regulation
• All controlled products fall into one or more
  WHMIS classes

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The Workplace Hazardous Materials Information
System (WHMIS)
There are three components to WHMIS

• Labeling
• materials must have supplier labels containing
  information about what the material is, its
  hazards, and how to prevent injury when using it.
• Material Safety Data Sheets (MSDS)
• provide further, more specific information about
  the hazards of the material, possible health
  effects and preventative measures.
• Worker Education and Training
• Employers must ensure that their employees are
  informed about the hazards of any controlled
  products they may work with and about any
  procedures necessary to work safely with a
  controlled product.

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WHMIS Classes

• Six classes, some having subdivisions
• Each class has a symbol to enable quick
  identification

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WHMIS Class A(Compressed Gas)

• Any material that is normally a gas,
  underpressure and in a container
• Dangerous because it is under pressure
• If the cylinder breaks it can rocket at great
  speeds
• If heated, the gas will expand and the cylinder
  might explode
• Gas from a leaking cylinder is very cold and may
  cause frostbite
• Additional dangers may be present if the gas has
  other hazardous properties

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WHMIS Class B(Flammable Material)

• Division 1 Flammable Gas
• Division 2 Flammable Liquid
• Division 3 Combustible Liquid
• Division 4 Flammable Solid
• Division 5 Flammable Aerosol
• Division 6 Reactive Flammable Material
• Flammable material will burn or catch fire at
  normal temperatures (below 37.8 degrees C)
• Combustible materials must usually be heated
  before they catch on fire (above 37.8 degrees C)
• Reactive flammable materials are those which may
  suddenly start burning when it touches air or
  water, or may react with air or water to make a
  flammable gas

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WHMIS Class C(Oxidizing Materials)

• Oxygen is required for fire to occur
• Some chemicals can cause other materials to burn
  by supplying oxygen
• Oxidizers do not usually burn themselves, but
  will either help the fire burn by supplying
  oxygen or they may cause materials that normally
  do not burn to suddenly catch fire (spontaneous
  combustion)
• In some cases, a spark or flame (source of
  ignition) is not necessary for the material to
  catch on fire but only the presence of an
  oxidizer.

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WHMIS Class DPoisonous and Infectious Materials

• Division 1 Materials Causing Immediate and
  Serious Toxic Effects
• Subdivision A Very toxic material
• Subdivision B Toxic material
• Division 2 Materials Causing Other Toxic Effects
• Subdivision A Very toxic material
• Subdivision B Toxic material
• Division 3 Biohazardous Infectious Material

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WHMIS Class D (Division 1)

• Materials causing immediate and serious toxic
  effects
• Very poisonous and immediately dangerous to life
  and health
• Health effects include burns, loss of
  consciousness, coma, death within just minutes to
  hours after exposure
• Can cause long term effects not noticed for
  months or years

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WHMIS Class D(Division 2)

• Materials causing other toxic effects
• Effects not always quick, or if they are
  immediate, they are only temporary
• Materials without immediate effects can lead to
  serious problems such as cancer, allergies,
  reproductive problems, harm to the baby,
  mutations, irritation/sensitization
• Can result from small exposures over a long
  period of time

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WHMIS Class D(Division 3)

• These materials are organisms or the toxins they
  produce that can cause diseases in people or
  animals
• Included in this division are bacteria, viruses,
  fungi and parasites
• Because these organisms can live in body tissues
  or fluids (blood, urine), the tissues and fluids
  are also treated as toxic.

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WHMIS Class ECorrosive Material

• Materials that can cause severe burns to human
  skin and other tissues such as eyes and lungs
• Can destroy clothes and other materials such as
  metals and plastics
• Their effects are permanent

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WHMIS Class FDangerously Reactive Material

• A material is considered to be dangerously
  reactive if it shows three different properties
  or abilities
• It can react quickly with water to produce toxic
  gas
• React with itself if it is shocked (bumped or
  dropped), or if the temperature of pressure
  increases
• If it can vigourously join itself
  (polymerization), break down (decomposition), or
  lose extra water such that it becomes a more
  dense material (condensation)
• Usually described as unstable
• Extremely hazardous due to the quick manner in
  which they react

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WHMIS MSDS

• Every material that is controlled by WHMIS must
  have an accompanying MSDS
• There are nine categories of materials not
  covered by WHMIS
• 1. Consumer restricted products (sold in
  regular stores, labeled under Hazardous
  Products Act)
• 2. Explosives (defined by Explosives Act)
• 3. Cosmetics, foods, devices (defined by the
  Food and Drug Act)
• 4. Pest control products (defined by Pest
  Control Products Act)
• 5. Radioactive material (defined by Atomic
  Energy Control Act)
• 6. Wood and wood products
• 7. A manufactured article
• 8. Tobacco or tobacco products
• 9. Hazardous wastes

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What is MSDS?

• MSDS - Material Safety Data Sheet
• Provides workers and emergency personnel with the
  proper procedures for handling and working with a
  particular substance
• MSDSs include physical data (melting point,
  boiling point etc), toxicity, health effects,
  first aid, reactivity, storage, disposal,
  protective equipment and spill procedures

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What are MSDS for?

• MSDSs are only required for materials that are
  hazardous
• Physical Hazard evidence that the chemical is a
  combustible liquid, compressed gas, explosive,
  flammable, an organic peroxide, an oxidzer,
  pyrophoric, unstable or water reactive
• Health Hazard evidence shows that the chemical
  leads to accute or chronic health effects
• Includes chemicals which are carcinogens, toxic,
  irritants, corrosives, sensitizers, hepatotoxins,
  nephrotoxins, neurotoxins, agents which damage
  the lungs, skin, eyes or mucous membranes

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Who are MSDSs for?

• People who may be occupationally exposed to a
  hazard at work
• People who need to know the proper methods of
  storage etc.
• Emergency responders such as firefighters, HAZMAT
  crews, EMTs and emergency room personnel

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Where can I get MSDS?

• Get them from the distributor that sold you the
  chemical (dont throw them away!)
• The internet has a wide range of free resources
  http//www.ilpi.com/msds/index.html
• You can purchase software or internet
  subscriptions

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Reading an MSDS

• MSDSs follow a international standard 16 heading
  format
• Although MSDSs may look slightly different from
  one another, they should all have the same type
  information under the 16 headings

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• MSDS must
• accompany chemicals
• conform to OSHA standards
• be maintained by school
• be written or electronic copies
• replaced within 30 days
• be readily available on request

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Material Safety Data Sheet (MSDS)
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Silver Nitrate MSDS
HMIS (Hazardous Materials Industrial Standards)
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Silver Nitrate MSDS
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Reading an MSDSSection 1Product and Company
Information
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MSDS Section 2Composition/Information on
Ingredients
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MSDS Section 3Hazards Identification
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MSDS Section 4First Aid Measures
 
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MSDS Section 5Fire Fighting Measures

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MSDS Section 6Accidental Release Measures
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MSDS Section 7Handling and Storage
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MSDS Section 8Exposure Controls/ Personal
Protection
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MSDS Section 9Physical and Chemical Properties
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MSDS Section 10Stability and Reactivity
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MSDS Section 11Toxicological Information
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MSDS Section 12Ecological Information
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MSDS Section 13Disposal Considerations
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MSDS Section 14Transportation Information
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MSDS Section 15 Regulatory Information
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MSDS Section 16Other Information
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Reading MSDS

• The internet has many resources to help make
  sense of MSDS
• http//ccinfoweb.ccohs.ca/help/msds/msdsINTGUIDE.h
  tml - complete breakdown of all 16 sections with
  additional information on each
• http//www.ilpi.com/msds/ref/index.html -
  contains a glossary for unfamiliar words often
  associated with MSDS
• http//www.ilpi.com/msds/faq/index.html -
  comprehensive MSDS FAQ
• http//msds.ehs.cornell.edu/msdssrch.asp - In
  depth MSDS search tool

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Chemical Hazards

• A toxic substance can interact chemically with
  the body to produce harm or injury. However, the
  severity of the injury depends on several
  factors
• dose
• duration or frequency of exposure
• route of exposure
• inhalation (through the lungs), absorption
  through contact with skin, ingestion (through the
  mouth and digestive system) and through the eyes.
  
• chemical state

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How Toxic is a Substance?

• Lethal Dose Fifty (LD50)
• the dose of the substance which causes death in
  half (50) of a group of test animals.
• reported in units of milligrams of substance per
  kilogram of body weight of the animal and
  information about the species of animal tested
  and the route of exposure
• the lower the value of LD50, the more toxic the
  substance
• Toxic Dose Fifty (TD50)
• the dose of the substance in milligrams of
  substance per kilogram of body weight required to
  show a specific toxic effect in 50 of a group of
  test animals.
• the lower the value of LD50, the more toxic the
  substance
• Exposure Limits
• Threshold Limit Values (TLV's), or Permissible
  Exposure Limits (PEL's)
• these are the maximum concentrations in air of a
  substance that most people may be exposed to
  without suffering adverse effects.
• these values give no information about safe
  limits of exposure through other routes
• Time-weighted average TLV (TLV/TWA)
• the concentration of substance that a normal
  person may be exposed to by inhalation for 8
  hours a day, 5 days a week
• The short term exposure limit TLV (TLV/STEL)
• the concentration of substance that a normal
  person can be exposed to by inhalation for a
  short period (no more than 15 minutes)