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Homework

 

Safety Symbols (Science Probe 10 p. xi)

 
 

 


 

 

 

Fill out the table below on Hazardous Household Product Symbols:

 

Symbol

Meaning

Symbol

Meaning

Danger

Flammable

Warning

Poison

Caution

Explosive

 

 

Corrosive

 

 

List 3 products from your home with Hazardous Household Product Symbols and draw the symbol for each.

 

Toxic/ Poisonous:  = fungicides, insecticides, fertilizers, antifreeze

 

Corrosive =  chlorine bleach cleaner, pool chemicals, car batteries


Reactive =   chlorine bleach (with hydrochloric acid), pool chemicals with compounds containing ammonia, dishwater detergent

 

Flammable/ Combustible = paint thinner, rubber cement, hair spray

 

 

Fill out the table below on Workplace Hazardous Materials Information System (WHMIS) symbols:

 

Symbol

Class-Division

Product Type

Class A

Compressed Gas

 

 

 

Class B

Flammable Combustible

Material

Class C

Oxidizing Material

Class D

Division 1

Poisonous and Infectious materials Causing Immediate and Serious Toxic Effects

 

Symbol

Class-Division

Product Type

Class D

Division 2

Poisonous and Infectious materials Causing Other Toxic Effects

Class D

Division 3

Poisonous and Infectious materials

that are Biohazardous

Class E

Corrosive Material

Class F

Dangerously

Reactive Material

 

Go to the website http://www.ccohs.ca/oshanswers/legisl/whmis_classifi.html and give examples for 3 symbols

 

Class A-Compressed Gas: carbon dioxide, propane, oxygen

 

Class B-Flammable Combustible Material: butane, acetylene, ethanol

 

Class C-Oxidizing Material: ozone, nitric acid, potassium permanganate

 

Class D Division 1-Poisonous and Infectious materials Causing Immediate and Serious Toxic Effects:

carbon monoxide, sodium cyanide, sulphuric acid

 

Class D-Division 2-Poisonous and Infectious materials Causing Other Toxic Effects: asbestos, mercury, lead

 

Class D-Division 3-Poisonous and Infectious materials that are Biohazardous: AIDS/HIV, hepatitis B, salmonella

 

Class E-Corrosive Material: sulphuric acid, nitric acid, ammonium hydroxide, chlorine

 

Class F-Dangerously Reactive Material:  ethyl acrylate, vinyl chloride, ethylene oxide

 

Read the following Material Safety Data Sheet and answer the questions on the next page:

 

NITRIC ACID

Product Identification

Synonyms: Aqua Fortis; Azotic Acid; Nitric Acid 50%; Nitric Acid 65%; nitric acid 69-70%
Molecular Weight: 63.01                                          Chemical Formula: HNO3

Composition/Information on Ingredients

Nitric Acid 70%             Water 50%

Hazards Identification

Nitric acid is extremely hazardous; it is corrosive, reactive, an oxidizer, and a poison.

Inhalation:
Corrosive! Inhalation of vapors can cause breathing difficulties and lead to pneumonia and pulmonary edema, which may be fatal. Other symptoms may include coughing, choking, and irritation of the nose, throat, and respiratory tract.
Ingestion:
Corrosive! Swallowing nitric acid can cause immediate pain and burns of the mouth, throat, esophagus and gastrointestinal tract.
Skin Contact:
Corrosive! Can cause redness, pain, and severe skin burns. Concentrated solutions cause deep ulcers and stain skin a yellow or yellow-brown color.
Eye Contact:
Corrosive! Vapors are irritating and may cause damage to the eyes. Contact may cause severe burns and permanent eye damage.
Chronic Exposure:
Long-term exposure to concentrated vapors may cause erosion of teeth and lung damage. Long-term exposures seldom occur due to the corrosive properties of the acid.
Aggravation of Pre-existing Conditions:
Persons with pre-existing skin disorders, eye disease, or cardiopulmonary diseases may be more susceptible to the effects of this substance.

First Aid Measures

Immediate first aid treatment reduces the health effects of this substance.
Inhalation:
Remove to fresh air. If not breathing, give artificial respiration. If breathing difficult, give oxygen. Call physician.
Ingestion:
DO NOT INDUCE VOMITING! Give large quantities of water or milk if available. Never give anything by mouth to an unconscious person. Get medical attention immediately.
Skin Contact:
In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.
Eye Contact:
Immediately flush eyes with plenty of water for at least 15 minutes, lifting lower and upper eyelids occasionally. Get medical attention immediately.

Physical and Chemical Properties

Appearance:  Colorless to yellowish liquid

Odor: Suffocating, acrid

Solubility: Infinitely soluble

 

pH: 1.0 (0.1M solution)
Boiling Point: 122C (252F)
Melting Point: -42C (-44F) 

 

 

1.     Name a synonym for Nitric acid.

 

Aqua Fortis; Azotic Acid

 

 

2.     Draw the WHMIS symbol(s) for Nitric acid.

 

 

 

 

 

 

 

 

3.     List the hazards and describe the treatment for skin contact with Nitric acid.

 

Hazards:

Corrosive! Can cause redness, pain, and severe skin burns. Concentrated solutions cause deep ulcers and stain skin a yellow or yellow-brown color.


Treatment:

In case of contact, immediately flush skin with plenty of water for at least 15 minutes while removing contaminated clothing and shoes. Wash clothing before reuse. Thoroughly clean shoes before reuse. Get medical attention immediately.