Diligent Management of HW and SST
Document
Date :
Chemical Engineering Department Hazardous Waste
Disposal
Revision
03:
Chemical Engineering
GD-I1.3
5-April04
9 April
2014
Waste Disposal
Responsible :
_________________________________________ Date : _______
Responsible for ChEng Laboratory Committee
Record of Revisions
Revision
Number
R03
Date
9-Apr-2014
Description of the Revision
General updates
Page 1 of 10
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Diligent Management of HW and SST
Document
Date :
Chemical Engineering Department Hazardous Waste
Disposal
Revision
03:
Chemical Engineering
GD-I1.3
5-April04
9 April
2014
OBJECTIVE: Establish the procedure to follow to safely dispose of hazardous waste
generated by the users of the Chemical Engineering Department.
TABLE of CONTENTS:
SECTION
12345678-
A-1
A-2
A-3
TOPIC
Management of different types of hazardous wastes
Labelling hazardous wastes
Request form for disposal
Storage of hazardous wastes
Costs for disposal of hazardous wastes
Products that can be disposed of as household waste
Products that cannot be kept after their expiration date
Empty containers
ANNEXES
Example of a hazardous waste label
List of products considered nonhazardous
List of products that must be disposed of after expiration
1- Management of different types of hazardous wastes
1.1- Organic solvent waste
 All solvents of the following families can be disposed of in the same container:
alcohol, ester, ketone, saturated hydrocarbon aldehyde, and aromatic
hydrocarbon.
For example: Methanol, ethyl acetate, acetone, propionaldehyde, hexane, and
toluene.

All solvents in the amino, unsaturated and chlorinated families must be kept in
their original containers.
For example: Aniline, decene, dichloromethane

All products that are dangerously reactive must be kept in their original container.
For example: Styrene, aluminum chloride, sodium

Organic solvents must be collected in their original containers or amber glass
bottles. The 2ml vials used for chromatography do not need to be transferred.
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Diligent Management of HW and SST
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Chemical Engineering Department Hazardous Waste
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Chemical Engineering
GD-I1.3
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9 April
2014
1.2- Acid waste
 Acid waste must be collected in its original container, a white plastic container or
a glass container compatible with various types of acid. The different types of
acid waste must be kept separate.
 Hydrofluoric acid : in the original container only
 Perchloric and nitric acid: in glass containers
 The other acids : in plastic containers

High pH waste (pH between 6 and 7) can be disposed of down the drain (check
with the person in charge of the laboratory).
1.3-Low pH waste
 Low pH waste must be collected in its original container or a white plastic
container. Different types of low pH waste must be kept separate.
For example: Sodium hydroxide, potassium hydroxide

Low pH waste (pH between 7 and 8) can be disposed of down the drain (check
with the person in charge of the laboratory).
1.4- Aqueous solution waste
 Diluted aqueous solutions must be collected in plastic containers and can be
grouped together.
1.5- Inorganic salt waste
 Inorganic salt waste must be collected in its original container or white plastic
containers. Different types of inorganic salt waste must not be put together.
For example: Copper sulfate, potassium phosphate, ammonium chloride
1.6- Organic solid waste
 Organic solid waste must be collected in its original container or a white plastic
container. Different types of organic solid waste must be kept separate.
For example: Oxalic acid, phenolphthalein, naphthalene
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Chemical Engineering Department Hazardous Waste
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Chemical Engineering
GD-I1.3
5-April04
9 April
2014
1.7- Oxidizing liquid/solid waste
 Oxidizing liquid/solid waste must be collected in its original container or a white
plastic container for solids and a glass container for liquids. Different types of
oxidizing waste must be kept separate.
For example: Sodium nitrate, potassium dichromate, hydrogen peroxide
1.8- Mercury waste
 Material used to clean up a mercury spill or store mercury must be collected in a
chemical resistant plastic bag.
For example: Paper and glass contaminated by mercury

Liquid mercury must be collected in glass or plastic containers.
1.9- Waste containing nanoparticles and nanomaterials
 Waste containing solid phase nanoparticles (particles, powders), adsorbed or not
on the surfaces, must be collected in a double walled container.
For example: Powder nanoclays, soot from carbon nanotubes on cloths
2- Labelling hazardous waste
Each container of hazardous waste to be disposed of must be identified properly with a
department label, which is available from the technicians responsible for disposal. (See
sample label in annex 1)
3- Request form for disposal
When the person in charge of the laboratory or a laboratory user wants to dispose of a
hazardous waste, he must complete the proper form and give it to the technician in
charge of disposal. This form describes the nature of the compounds, the format of the
container, the quantity present in the container as well as the name of the researcher,
who will pay for the disposal of the products. For this purpose use the request form for
disposal available on the Chemical Engineering website.
4- Storage of hazardous waste
Hazardous waste must be stored in the same way that pure products are stored, which
means taking incompatibilities into consideration.
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Chemical Engineering Department Hazardous Waste
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Chemical Engineering
GD-I1.3
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9 April
2014
5- Cost of hazardous waste disposal
The cost associated with the disposal of all hazardous waste generated by a research
group is invoiced to the researcher in charge of the research group. In addition, if a
product is not identified, additional costs will be billed to the researcher.
6- Waste that can be disposed of as household waste
Certain products can be disposed of like household waste. Refer to the list of products
considered non-hazardous in annex 2.
NB:
Consult the technicians in charge of disposal to confirm the authorized quantities
7- Products that cannot be kept after their expiration date
It is mandatory to dispose of certain products after their expiration date has passed.
Refer to the list in annex 3 to learn about the products and the new risks associated with
changes after the expiration date.
8-Empty containers
8.1- Organic solvents
 All empty containers for organic solvents must be rinsed with acetone and then
put under the fume hood to let the last traces of acetone evaporate.
 Once done, bring the containers to the technicians in charge of disposal.
8.2- Low and high pH
 All empty low and high pH containers must be rinsed with water.
 Once rinsed, bring the containers to the technicians in charge of disposal.
8.3- Organic solids
 All empty organic solids containers must be rinsed with acetone and then put
under the fume hood to let the last traces of acetone evaporate.
 Once done, bring the containers to the technicians in charge of disposal.
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Chemical Engineering Department Hazardous Waste
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Chemical Engineering
GD-I1.3
5-April04
9 April
2014
8.4- Inorganic solids
 All empty low and high pH containers must be rinsed with water.
 Once rinsed, bring the containers to the technicians in charge of disposal.
8.5- Dangerously reactive products
 All empty containers of dangerously reactive products must be disposed of like
hazardous waste and must be given to the technicians in charge of disposal.
For any other product or empty container, see the technicians in charge of disposal.
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Date :
Chemical Engineering Department Hazardous Waste
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Revision
03:
Chemical Engineering
ANNEX 1- Sample label for Hazardous Waste
Chemical Engineering
Hazardous Waste
Product:
Composition:
User:
Researcher:
Date:
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Diligent Management of HW and SST
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Chemical Engineering Department Hazardous Waste
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Revision
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Chemical Engineering
ANNEX 2
List of non-hazardous products
Product
Product
Agar
Ascorbic acid
Asphalt
Casein
Cellulose (non nanometric)
Citric acid
Clay
Corn oil
Corn syrup
Cornstarch
Dextrin
Dextrose
Fructose
Galactose
Glucose
Glycerine
Lactic acid
Lactose
Lauric acid
Magnesium chloride
Maltose
Mannose
Molasses
Olive oil
Palmitic acid
Penicillin
Pepsine
Peptone
Potassium chloride
Potassium citrate
Protein
Saccharose
Sand
Sodium chloride
Sodium citrate
Soya oil
Sucrose
Sunflower oil
Talc
Teflon
Vegetable oil
Yeast
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Diligent Management of HW and SST
Document
Date :
Chemical Engineering Department Hazardous Waste
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Revision
03:
Chemical Engineering
GD-I1.3
5-April04
9 April
2014
Annex 3
List of products that must be disposed of after expiration
Products
Acetal
Acrylic acid
Acrylonitrile
Aldehydes
Butadiene
Chloroprene
Chlorotrifluoroethylene
Risks
Flammable
Toxic
Toxic
Reactive
Combustible
Toxic
Flammable
Reactive
Flammable
Toxic
Flammable
Toxic
Toxic
Flammable
Extremely
flammable
Cyclohene
Inflammable
Decahydronaphtalene
Combustible
Flammable
Explosive
Flammable
Flammable
Toxic
Flammable
Flammable
Toxic
Flammable
Explosive
Diacetylene
Dicyclopentadiene
Diethyl ether
Dimethoxyethane
Dioxane
Divinyl Acetylene
Causes of change
New Risks
Disposal
Explosive
6 months
Reacts with air to form peroxides; the
peroxides initiate polymerization
Explosive
1 yr
Reacts with air to form peroxides; the
peroxides initiate polymerization
Explosive
1 yr
Inflammable
Corrosive
3 months
to 1 yr
Explosive
1 yr
Explosive
1 yr
Explosive
1 yr
Explosive
1 yr
6 months
Reacts with air to form peroxides
Explosive
Very
explosive
Explosive
Reacts with air to form peroxides
Explosive
6 months
Reacts with air to form peroxides
Explosive
Very
explosive
1 yr
In 1 yr, water contamination produces
alcohols and acids
Reacts with air to form peroxides; the
peroxides initiate polymerization
Reacts with air to form peroxides; the
peroxides initiate polymerization
Reacts with air to form peroxides; the
peroxides initiate polymerization
Reacts with air to form peroxides; the
peroxides initiate polymerization
Reacts with air to form peroxides
Reacts with air to form peroxides
Reacts with air to form peroxides
Reacts with air to form peroxides
Explosive
Ethers
Flammable
Reacts with air to form peroxides
Explosive
Ethoxy compounds
Varied
Reacts with air to form peroxides
Explosive
Hydrogen peroxide
Oxidizing
Toxic
Hydroiodic acid
Toxic
Decomposes into hydrogen and iodine
when exposed to light and heat
Decomposes into hydrogen and iodine
when exposed to light
Isopropyl ether
Metallic potassium
Methoxy compounds
Flammable
Toxic
Pyrophoric
Reacts with
water when cut
Varied
1 yr
6 months
6 months
3 months
3 months
to 1 yr
3 months
to 1 yr
Flammable
3 months
Explosive
1 yr
Reacts with air to form peroxides
Very
explosive
3 months
Reacts with air to form peroxides
Explosive
when cut
3 months
Reacts with air to form peroxides
Explosive
3 months
to 1 yr
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Chemical Engineering Department Hazardous Waste
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Revision
03:
Chemical Engineering
GD-I1.3
5-April04
9 April
2014
Products
Risks
Causes of change
New Risks
Disposal
Methyl acetate
Extremely
flammable
Toxic
Reacts with air to form peroxides
Explosive
1 yr
Methyl methacrylate
Flammable
Explosive
1 yr
Perchloric acid
Corrosive
Oxidizing
Explosive
3 months
Picric acid
Corrosive
Explosive
1 yr
Explosive
3 months
Explosive
1 yr
Reacts with air to form peroxides
Explosive
1 yr
Reacts with air to form peroxides
Explosive
1 yr
Reacts with air to form peroxides
Explosive
1 yr
Reacts with air to form peroxides; the
peroxides initiate polymerization
Explosive
1 yr
Reacts with air to form peroxides; the
peroxides initiate polymerization
Explosive
1 yr
Reacts with air to form peroxides; the
peroxides initiate polymerization
Explosive
1 yr
Explosive
1 yr
Explosive
1 yr
Explosive
3 months
Sodium amide
Styrene
Tetrafluoroethylene
Tetrahydrofuran
Tetrahydronaphtalene
Vinyl acetate
Vinyl acetylene
Vinyl chloride
Vinyl ethers
Vinyl pyridine
Vinylidene chloride
Flammable
Toxic
Flammable
Reactive, toxic
Toxic
Reactive
Flammable
Toxic
Combustible
Flammable
Toxic
Reactive
Extremely
flammable
Explosive
Inflammable
Toxic
Explosive
Flammable
Toxic, reactive
Reactive
Extremely
flammable
Toxic, reactive
Reacts with air to form peroxides; the
peroxides initiate polymerization
Fumes that condense on cold surfaces
react with organic materials and form
explosives that are sensitive to impacts
(the movement of the hood door could be
enough to provoke a detonation)
Progressive water evaporation leads to
explosive crystals
Reacts with water when cut
Reacts with air to form peroxides; the
peroxides initiate polymerization
Reacts with air to form peroxides
Reacts with air to form peroxides; the
peroxides initiate polymerization
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