1. Chemical Safety
Awareness Course
Jonathan Gulley
DGS/SEE

2. “Toxics”
These substances can poison even at small doses, can pose a serious health risk, in the short or long term, and even result in death.
Examples: cyanides, methanol, asbestos, wood dust, mercury, lead, hydrofluoric acid….
Carcinogen (asbestos, beryllium and certain of its compounds, tobacco smoke, wood dust, chromic acid, chromium VI...)
Mutagen (chromic acid, bromine, benzene…)
Toxic to Reproduction (lead and certain of its compounds, carbon monoxide, mercury…)
Orange labels are old labels are gradually being replaced by the diamond shape. By 2015 all new chemicals will come with the diamond label.
“chess” hazard sign represents may hazards like toxic and CMR or specific organ
“nocif” – harmfull

3. Health Hazards
Sensitizing agents: cause a substantial proportion of exposed people to develop an allergic reaction in normal tissue after repeated exposure.
Sensitizing in case of skin contact, or respiratory sensitizers (asthma):
Examples: some glues, some epoxy resins, some fluxes used in welding/soldering…
Sensitizing: skin contact, or respiratory sensitizers (asthma)
They are sensitive to these exposures
A solution can be working in a glove box
Corrosive substances: in contact with living tissue, can have a destructive effect.
Examples: acids (nitric, hydrochloric, sulphuric, hydrofluoric) bases (sodium hydroxide), some glue hardeners..

4. Reactive chemicals
Oxidizing agents - substances which can provoke or aggravate a fire, or even provoke an explosion, if in the presence of flammable materials.
Examples: halogens, oxygen, hydrogen peroxide, sodium hypochlorite, nitric acid..
Substances which can explode in contact with a flame, a spark, static electricity, heat, shock…
Before were the health hazards.
Now we talk about the physical hazards
Explosif is only for solid material
Flammable:
Many more: like alkaline metals
Flammable substances (solids, liquids, gases..)
Examples: flammables gases (methane, isobutane, hydrogen); flammable liquids (ethanol, acetone); certain metals in the form of dust, sodium, potassium...

5. Others… Dangerous for the environment Pressurized gas
Examples: Solvents, glues, paints, hardeners, biocides/pesticides..
Pressurized gas

6. Where to find information?
GHS labels
(new pictograms)
1st place to look is the label on the container
H225 is the “hazard statement”
P102 is the “precaution statement”

7. Where to find information?
Labels
CERN Stores
SCEM :
In the CERN stores we have pre labeled bottles put we can buy it separate
Ad-hoc labels done at CERN for specific applications
SCEM :

8. Where to find information?
Safety data sheet
(SDS or MSDS)
Chemical Product and Company Identification
Hazards Identification
Composition, Information on Ingredients
First Aid Measures
Fire Fighting Measures
Accidental Release Measures
Handling and Storage
Exposure Controls, Personal Protection
Physical and Chemical Properties
Stability and Reactivity
Toxicological Information
Ecological Information
Disposal Considerations
Transport Information
Regulatory Information
Additional Information
SDS is the primary source of information – produced by the supply and the MUST provide this with the chemical
Always 16 chapters regulated by the REACH directive
Highlight chapter 2 and 7

9. Radiation monitoring device, using flammable gas under pressure
Hazards in the vicinity
Outside the T9 Zone
Flammable gas distribution racks, equipped with gas detection giving a Level 3 Alarm to the Fire Brigade.
Inside the T9 Zone
Radiation monitoring device, using flammable gas under pressure
Acoustic alarm or flashing light evacuate!

10. Chemical storage for the CLOUD Experiment
Hazards in the vicinity
Inside Building 157
Chemical storage for the CLOUD Experiment
Outside Building 157
Flammable gas bottle storage – The EX sign indicates the potential presence of an explosive atmosphere