Unit 4 - Laboratory Techniques and their Application
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Applied science, unit 4, assignment 4C
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Unit 4 - Laboratory Techniques and their Application
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PEARSON (PEARSON)
Distinction grade 4C assignment, includes all the relevant information for pass, merit and distinction. Use this as a template for your own assignment and to learn the key points you should make in your own to get a distinction first try.
Unit 4 - Laboratory Techniques and their Application
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Assignment 4C
Risk assessment of chemicals used
Methyl benzoate-
Highly flammable liquid and vapor. Causes serious eye irritation. May be fatal if swallowed and enters
airways. May cause drowsiness or dizziness. Repeated exposure may cause skin dryness or cracking.
Irritating to the eyes, nose, throat, upper respiratory tract, and skin. May cause allergic skin and
respiratory reactions. Methyl benzoate is an ester. Esters react with acids to liberate heat along with
alcohols and acids. Strong oxidizing acids may cause a vigorous reaction that is sufficiently exothermic to
ignite the reaction products. Heat is also generated by the interaction of esters with caustic solutions.
Flammable hydrogen is generated by mixing esters with alkali metals and hydrides. This compound
reacts with strong oxidizing agents and strong bases and hydrolyzes slowly in contact with water.
First aid in the case of contact- eyes: First check the victim for contact lenses and remove if present.
Flush victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously
calling a hospital or poison control center. Do not put any ointments, oils, or medication in the victim's
eyes without specific instructions from a physician. Immediately transport the victim after flushing eyes
to a hospital even if no symptoms (such as redness or irritation) develop.
skin: immediately flood affected skin with water while removing and isolating all contaminated clothing.
Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or
irritation develop, immediately call a physician, and be prepared to transport the victim to a hospital for
treatment.
inhalation: immediately leave the contaminated area; take deep breaths of fresh air. If symptoms (such
as wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a
physician, and be prepared to transport the victim to a hospital. Provide proper respiratory protection to
rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus
(SCBA) should be used; if not available, use a level of protection greater than or equal to that advised
under Protective Clothing.
ingestion: do not induce vomiting, If the victim is conscious and not convulsing, give 1 or 2 glasses of
water to dilute the chemical and immediately call a hospital or poison control center. Be prepared to
transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do
not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side
with the head lower than the body. Do not induce vomiting. Immediately transport the victim to a
hospital.
Benzoic acid-
Causes skin irritation, serious eye damage, damage to organs (lungs) through prolonged or repeated
exposure (inhalation). Vapor from molten benzoic acid may form explosive mixture with air. Finely
powdered dry acid is a significant dust explosion hazard. In the air very rapid combustion occurs. Slightly
, soluble in water. Behavior in Fire: Vapor from molten benzoic acid may form an explosive mixture with
air. Concentrated dust may form an explosive mixture. Dust may be irritating to the nose and eyes. At
elevated temperatures, fumes may cause irritation of eyes, respiratory system, and skin. At high
temperature BENZOIC ACID can react with oxidizing reagents.
First aid in case of contact- eyes: First check the victim for contact lenses and remove if present. Flush
victim's eyes with water or normal saline solution for 20 to 30 minutes while simultaneously calling a
hospital or poison control center. Do not put any ointments, oils, or medication in the victim's eyes
without specific instructions from a physician. Immediately transport the victim after flushing eyes to a
hospital even if no symptoms (such as redness or irritation) develop.
skin: immediately flood affected skin with water while removing and isolating all contaminated clothing.
Gently wash all affected skin areas thoroughly with soap and water. If symptoms such as redness or
irritation develop, immediately call a physician, and be prepared to transport the victim to a hospital for
treatment.
inhaltion: immediately leave the contaminated area; take deep breaths of fresh air. If symptoms (such as
wheezing, coughing, shortness of breath, or burning in the mouth, throat, or chest) develop, call a
physician, and be prepared to transport the victim to a hospital. Provide proper respiratory protection to
rescuers entering an unknown atmosphere. Whenever possible, Self-Contained Breathing Apparatus
(SCBA) should be used; if not available, use a level of protection greater than or equal to that advised
under Protective Clothing.
ingestion: do not induce vomiting. If the victim is conscious and not convulsing, give 1 or 2 glasses of
water to dilute the chemical and immediately call a hospital or poison control center. Be prepared to
transport the victim to a hospital if advised by a physician. If the victim is convulsing or unconscious, do
not give anything by mouth, ensure that the victim's airway is open and lay the victim on his/her side
with the head lower than the body.do not induce vomiting. Immediately transport the victim to a
hospital.
Methyl orange
Hazard:
o Skin inflammation and discoloration
o When inhaled, certain substances can infect your respiratory system.
o Due to its high flammability, it may catch fire.
o If consumed, it may result in nausea, vomiting, and diarrhea.
reducing risk
o In order to prevent skin stains, wash your hands after using chemicals and whenever you come
into touch with them.
o To prevent objects from picking up chemicals and contaminating food sources or clean hands,
work benches should be free of clutter.
o Wearing gloves and a full lab coat will keep any exposed flesh from coming into touch with the
chemical.
o Maintain container far from your face.
o Provide ample ventilation in the workplace so that it cannot even be inhaled in significant
amounts
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