Download DEPARTMENT OF CHEMISTRY TEACHING LAB EXPERIMENT

DEPARTMENT OF CHEMISTRY
TEACHING LAB EXPERIMENT RISK ASSESSMENT FORM
This form must be completed jointly by the Lab Officer in charge and the Lecturer in charge. A
hardcopy of the completed form should be kept in a file together with the Project Risk
Assessment.
Name of Principal Investigator
Name of Lab Officer in Charge
Module / Expt No.
Dr Edith Chan Sau Han
Adeline Chia
CM2102 /expt 1
Activity being assessed:
Performing Infrared and Ultraviolet spectroscopy of unknown compounds.
Known or expected hazards associated with the activity:
Hazards of reagents, solvents and known reaction products.
State each substance and the approximate amounts to be used/produced.
1) 4-Methoxy-2-nitrophenol, 0.02g used
- Irritates eyes, skin and respiratory tract.
2) pH7, pH8 and pH13, 10mL used
Not regulated as a hazardous material. Avoid contact with skin and eyes.
3) 3-methylbenzonitrile – 1 drop
4) 4-bromoanisole – 1 drop
5) 2-ethylaniline – 1 drop
6) isobutylamine – 1 drop
6) tert-butylamine – 1 drop
Incompatible materials (special precautions):
1)
2)
3)
4)
5)
6)
4-methoxy-2-nitrophenol - stored away from oxidizing agents.
3-methylbenzonitrite - combustible liquid. Store away from heat and open flames.
4-bromoanisole – store away from strong oxidizing agents and strong acids.
2-ethylaniline – keep ignition sources away
Isobutylamine – highly flammable . gives off irritating or toxic fumes in a fire.
tert-butylamine - incompatible with strong acids, strong oxidizing agens. Highly
flammable.
The risk of injury and its severity likely to arise from these hazards:
1) 4-Methoxy-2-nitrophenol – can cause skin and eyes irritation.. Inhalation: material is
irritating to mucous membranes and upper respiratory tract
2) 3-methylbenzonitrite – combustible liquid, emits toxic fumes under fire conditions.
Causes skin irritation. Vapor is irritating to the eyes, mucous membranes and upper
respiratory tract.
3) 4-bromoanisole – skin and eye irritant and harmful if absorbed through the skin. May be
harmful if inhaled.
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4) 2-ethylaniline – harmful by inhalation and contact with skin and if swallowed.
5) isobutylamine - harmful to skin and eyes. By inhalation and ingestion.
6) Tert-butylamine – very harmful if swallowed, inhaled or absorbed through skin
Who is at risk?
Persons directly in contact with the above stated chemicals.
Measure to be taken to reduce the level of risk:
Proper laboratory attire and safety measures must always be used in order to reduce the level
of risk. No naked flame should be used during the experiment.
Training prerequisites:
Advise students on the hazards of reagents used and operation of UV and IR
spectrophotometers.
General lab competence required.
Use of Glassware
Use of Standard Electrical Equipment
Level of risk remaining:
Low, if all the necessary precautions are observed and followed.
Emergency action if :
Spill: Clean up all spills immediately. Absorb spill with absorbing kits, then place into suitable
disposal bag for disposal.
Fire: Use A, B, C fire extinguishers to extinguish all fires
Is the experiment suitable for out-of-hours operation?
Yes
No
References if any: MSDS data sheet (hard copies available in the lab)
Signature of Lab Officer in Charge::………………………………………………………………..
Date:…………………………
Signature of Lecturer in Charge:………… ……………………………………..
Date:… ……………………..
Prepared Risks Assessments for standard equipment and operation are with the kind permission of Dr. Ken MacNeil,
School of Chemistry, University of Bristol.
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Activity being assessed:
Note any activity to be used which entail risk (e.g. use of glass vacuum apparatus, high pressures, high
voltage, radiation, high temperatures). Give reference to any special protocols to be followed, and if
appropriate attach copies to the risk assessment form. State any additional precautions taken to minimise
risk.
Known or expected hazards associated with the activity:
FOR EACH CHEMICAL, read the MSDS and note:a) Particular hazards (e.g. highly toxic, carcinogenic, corrosive, flammable, pyrophoric, explosive, volatile,
dust hazard). Note any dangerous combinations of properties (e.g. volatile and toxic).
b) Requirements for safe handling (e.g. fume cupboard, inert atmosphere, low temperature).
c) How to dispose of residuals
 Dispose to drain, with water dilution
 Neutralise, then to drain with suitable dilution
 To flammable liquid waste receptacle
 To non-flammable liquid waste receptacle
 Keep for recovery/recycling
 Keep for special disposal later (e.g. heavy metals)
 Double bag and dispose to dry waste
 Special procedure (specify)
Incompatible materials (special precautions)
Note any dangerously incompatible materials and hazards arising from contact of any reagents and
substances used with common materials such as paper, benches, hoses, etc.
Measures to be taken to reduce the level of risk
Include hazards of previously unknown products.
Location of work – laboratory, open bench, fume cupboard
Level of risk remaining:
Likelihood and consequences of any accident or unforeseen events whilst carrying out the activity. When
this has been done, choose the appropriate procedure:a) Close supervision and/or attendance of trained first-aider needed.
b) Specific approval of supervisor needed.
c) Training is needed prior-to or during the operations specified.
d) Training is complete and only general laboratory competence required.
e) No risk perceived.
Emergency action:
a) Any special requirements to deal with accidental spillage or leakage.
b) What to do in the event of accidental exposure (skin contact, inhalation, etc.).
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