Chemical Safety Overview and HazComm
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Questions and Answers

Which of the following should you do when handling chemicals?

  • Use care in handling contaminated glassware (correct)
  • Store chemicals in unlabeled containers
  • Leave chemicals unattended
  • Eat snacks while working

    • It is safe to smoke near chemicals in the lab.

    False (B)

    What should you do if you cannot extinguish a chemical fire?

  • Look for more flammable materials
  • Try to extinguish the flames
  • Notify the chemical supplier
  • Evacuate the area immediately (correct)

    • What should you do with chemicals that are no longer needed?

    <p>Dispose of them properly</p> Signup and view all the answers

    It is safe to pour chemical waste down the drain if done quickly.

    <p>False (B)</p> Signup and view all the answers

    You should always wear appropriate __________ when working with chemicals.

    <p>safety gear</p> Signup and view all the answers

    What does PPE stand for?

    <p>Personal Protective Equipment</p> Signup and view all the answers

    Match the safety action with its corresponding guideline:

    <p>Store chemicals = In their original containers Pipetting method = Use a bulb instead of mouth pipetting Disposal of chemicals = Dispose properly Chemicals near food = Do not eat or drink</p> Signup and view all the answers

    When encountering a hazardous waste, always use a __________ container with a label.

    <p>flame resistant</p> Signup and view all the answers

    Match the following actions to their appropriate chemical safety procedures:

    <p>Remove contaminated clothing = First response to chemical exposure Notify supervisor/security = In case of emergency Ventilate work area = To reduce flammable fumes Find the MSDS = For chemical safety information</p> Signup and view all the answers

    What was Wetterhahn's blood mercury level compared to the toxic threshold?

    <p>80 times (D)</p> Signup and view all the answers

    Proper storage and handling of chemicals can eliminate all associated risks.

    <p>False (B)</p> Signup and view all the answers

    At what age did Wetterhahn die?

    <p>48</p> Signup and view all the answers

    Routine inspections of chemical storage areas should be conducted at least _____ annually.

    <p>once</p> Signup and view all the answers

    Match the following hazards with their corresponding storage considerations:

    <p>Temperature = Storage condition Ignition control = Fire prevention Ventilation = Air quality Segregation = Preventing chemical reactions</p> Signup and view all the answers

    Which action is recommended when chemicals are expired or unwanted?

    <p>Remove them from storage (C)</p> Signup and view all the answers

    In an emergency spill response, one should always respond to a major spill regardless of their training level.

    <p>False (B)</p> Signup and view all the answers

    What should be done to incompatible materials in chemical storage?

    <p>Proper segregation</p> Signup and view all the answers

    What is the primary focus of the term 'hazard' in safety terms?

    <p>Likelihood of a material to cause harm under conditions of use (A)</p> Signup and view all the answers

    Chronic exposure refers to short-term exposure to harmful substances.

    <p>False (B)</p> Signup and view all the answers

    Name one route of chemical exposure.

    <p>Inhalation, Ingestion, Injection, or Absorption</p> Signup and view all the answers

    To minimize exposure to hazards, individuals should wear __________.

    <p>personal protective equipment (PPE)</p> Signup and view all the answers

    Match the protection measures to their correct descriptions:

    <p>Elimination = Not using shelves Substitution = Using toluene instead of benzene Engineering controls = Fume hoods and eye wash Administrative controls = Training and scheduling</p> Signup and view all the answers

    Which of the following is classified as acute exposure?

    <p>Skin rashes and burns (A)</p> Signup and view all the answers

    Less toxic chemicals are never hazardous when handled improperly.

    <p>False (B)</p> Signup and view all the answers

    What tragic event highlighted the importance of following safety protocols in the lab?

    <p>The Sheharbano Sangji case</p> Signup and view all the answers

    What chemical was R.A. working with when the incident occurred?

    <p>t-butyl lithium (C)</p> Signup and view all the answers

    R.A. was wearing a lab coat at the time of the incident.

    <p>False (B)</p> Signup and view all the answers

    What percentage of R.A.'s body was burnt in the fire?

    <p>40%</p> Signup and view all the answers

    Dimethylmercury can rapidly permeate latex gloves and enter the skin within _____ seconds.

    <p>15</p> Signup and view all the answers

    Which material is NOT recommended for protection against strong acids?

    <p>Nitrile Buna Rubber (NBR) (D)</p> Signup and view all the answers

    Match the glove material with its compatibility:

    <p>Nitrile Buna Rubber (NBR) = Caustics, hydrocarbons Natural Rubber (NR) = Acids, alcohols Neoprene = Organic acids, alcohols Latex = Not suitable for dimethylmercury</p> Signup and view all the answers

    What was the primary focus of Karen Wetterhahn's research?

    <p>Toxic metal exposure</p> Signup and view all the answers

    The fire that occurred with R.A. was caused by introducing air into a syringe.

    <p>True (A)</p> Signup and view all the answers

    What is the flash point of petroleum ether?

    <p>-50℃ (B)</p> Signup and view all the answers

    The Globally Harmonized System (GHS) of chemical labeling is a binding system that all countries must follow.

    <p>False (B)</p> Signup and view all the answers

    What document is prepared by the chemical manufacturer that describes hazards and safe handling procedures?

    <p>Material Safety Data Sheet (MSDS)</p> Signup and view all the answers

    A proper chemical spill response should include _____ and appropriate waste disposal.

    <p>safety measures</p> Signup and view all the answers

    Match the following safety concepts with their descriptions:

    <p>Hazard Communication = Informs workers about chemical hazards PPE = Protective gear used to reduce exposure MSDS = Document providing safety information about chemicals GHS = System for classifying chemical hazards globally</p> Signup and view all the answers

    Which of the following is NOT included in a Material Safety Data Sheet (MSDS)?

    <p>Company financial data (A)</p> Signup and view all the answers

    Personal Protective Equipment (PPE) is not necessary for handling chemicals.

    <p>False (B)</p> Signup and view all the answers

    Name one method by which hazards are communicated to workers.

    <p>Labels</p> Signup and view all the answers

    The ability of a chemical to cause harm is referred to as _____ .

    <p>toxicity</p> Signup and view all the answers

    What resulted from the ignition of petroleum ether in the freezer scenario?

    <p>$500,000 in damage (C)</p> Signup and view all the answers

    Study Notes

    Chemical Safety Overview

    • Chemical safety is crucial for handling and using chemicals safely.
    • A case study involved petroleum ether (PE) stored in a freezer, which leaked and ignited, causing significant damage.
    • Another case involved hydrogen buildup in an anaerobic hood, leading to an explosion.
    • Four workers were affected in this second case, one critically.
    • Personnel ignored warning systems.

    Hazard Communication

    • Allows workers to understand the hazards and identities of the chemicals they are exposed to.
    • Describes the protection measures workers can use to protect themselves
    • HazComm is communicated through labels and Material Safety Data Sheets (MSDS).
    • Education and training are complementary components of HazComm.

    Material Safety Data Sheet (MSDS)

    • A document prepared by chemical manufacturers describing chemical properties.
    • It details physical and health hazards and exposure routes.
    • Guidance for safe handling and use and emergency/first-aid procedures.
    • Control measures are also detailed within this safety document.

    Globally Harmonized System (GHS)

    • A "non-binding" system adopted globally for hazard communication.
    • Defines and classifies chemical hazards, creating standardized labels and safety data sheets (SDSs).
    • Provides safe and consistent methods of communication across jurisdictions.
    • GHS includes pictograms to represent varied hazards.

    Toxicity and Risk

    • Toxicity is a chemical's ability to cause harm. Risk is how likely a material is to cause harm in use conditions.
    • Proper handling can ensure the safe use of highly toxic chemicals.
    • Improper handling can lead to hazards even with less toxic chemicals.

    Chemical Exposure

    • Four routes for chemical exposure include inhalation, ingestion, injection, and absorption.
    • Classification of exposure is based on duration, distinguishing acute (short-term) and chronic (long-term) exposures; this determines short vs. long-term effects.
    • Acute exposure symptoms include eye irritation, nausea, dizziness, skin rash, burns, and headache.

    Protection Measures

    • The hierarchy of risk controls emphasizes hazard elimination, substitution, engineering controls, administrative controls, and personal protective equipment (PPE).
    • Engineering controls such as fume hoods, engineered sharps, and eye washes greatly reduce exposure risk.
    • Administrative controls like education, training, procedures, and scheduling minimize risks through improved awareness of potential hazards.

    Personal Protective Equipment (PPE)

    • PPE is worn to minimize hazards, injuries, and illnesses resulting from exposure to chemicals, radiation, physical, electrical, and mechanical hazards.
    • Approprite PPE includes, but is not limited to, gloves (correct size and material), lab coats, eye protection, safety shoes, respirators, and face shields.

    Chemical Storage

    • Proper procedures for chemical handling involve routine inspections and maintaining stringent inventory control.
    • Minimizing the quantity of chemicals on hand, including the prompt removal of expired chemicals, reduces overall hazard.
    • Storage areas must be inspected at least annually to ensure correct conditions for storing chemicals.
    • Segregation (physical barriers and distance) is necessary to prevent incompatible materials from interaction.

    Chemical Spill Response

    • Do not respond beyond your training level.
    • Proper safety measures depend on whether it's a large or small spill.
    • Small spills involve removing contaminated clothing, using appropriate personal protective equipment (PPE).
    • Contain the spill, notifying workers. Seek advice from material safety data sheets (MSDS) and inform your supervisor/security.
    • Large spills require evacuation; notify authorities and use the appropriate safety procedures.

    Chemical Fire

    • Stop, think, and only try to extinguish the fire if you are trained to do so, otherwise evacuate the area.
    • If safe, extinguish open flames, turn off gas or electricity as soon as possible.
    • Notify workers, ventilate and inform supervisor/security.

    Hazardous Waste

    • Minimize waste generation and dispose of hazardous waste properly using appropriate containers.
    • Know your chemical classification.
    • Use flame-resistant containers with labels.
    • Dispose of broken thermometers using proper mercury disposal techniques.

    General Safety Rules

    • Store chemicals in their original containers.
    • Wear appropriate safety gear in a controlled environment.
    • Properly dispose of chemicals.
    • Be cautious when handling contaminated glassware.
    • Familiarize yourself with chemical properties and toxicity.
    • Avoid eating, drinking, or applying cosmetics near chemicals. Avoid mouth pipetting.

    Lab Safety Rules

    • Dress appropriately (safety gear).
    • Be careful when handling hot glassware (turn off heating appliances immediately).
    • Know locations for emergency numbers and safety equipment.
    • Keep the area clean and free of obstructions.
    • Handle glassware carefully.
    • Report cuts, spills, and broken glass immediately.
    • Avoid using food or drinks. No food in the lab.

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    Description

    This quiz covers essential concepts of chemical safety, including the importance of hazard communication and the use of Material Safety Data Sheets (MSDS). It highlights real-life case studies emphasizing the dangers of improper chemical handling. Test your knowledge on how to protect yourself and your colleagues in a chemical environment.

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