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Hazards in Science

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Graham Perrin

on 25 September 2014

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Transcript of Hazards in Science

What is a Hazard?
A hazard is anything with the potential to harm. Hazards in the science laboratory can be

Chemicals (e.g. hydrochloric acid)
Apparatus (e.g. Low Voltage Power Supply)
Procedures (e.g. heating a beaker of water)
Heat (flames/hot objects-tripods)
Hot liquids
Sharp instruments
Voltages above 25v
Lifting heavy objects
Taste, smell, touch
General hazards
Living or once living materials
Hazardous equipment
Field work
Hazards in Biology
Reagents - iodine solution, Benedict’s reagent, ninhydrin ……..
Chemical Dangers in Biology
Dissection and human emotional disturbance
Contamination e.g. Salmonella
Plants. allergies and toxins(e.g. buttercup, foxglove, laburnum)
Saliva and blood
Using Animal and Plant Materials
Choice of organisms
Facilities and resources
Preparation and disposal
Staff expertise
Scalpels and sharps
Aquariums (electric shock)
Biological Equipment and Apparatus
In loco parentis
Group control
Dangerous areas?
Supervision levels
Toxic e.g.ammonia gas, asbestos, chlorine, lead
Harmful e.g. copper sulphate, napthalene, iodine
Irritant e.g. dilute acids and alkalis, calcium chloride
Corrosive e.g. conc. acids and alkalis, soda lime
Flammable e.g. ethanol, sulphur, paraffin
Oxidising e.g. potassium nitrate and permanganate
Explosive e.g. ammonium nitrite, nitrocellulose
Radioactive e.g. thorium salts
Hazards in Chemistry (1)
Heating solids and liquids (quantities)
Smelling gases
Broken glass
Chemical disposal
Personal protection (goggles, gloves, aprons, lab coats, screens)
Fume cupboards
Hazards in Chemistry (2)
Electricity and electrostatics
Electron and gas discharge tubes
Large masses
Hazards in Physics (1)
High pressures or vacuums
Steam engines
Stroboscopes/signal generators
Viewing the sun
Wires under tension
Hazards in Physics (2)
Power supplies (less than 25V and 10A)
Van de Graaff generator (electric shock)
High tension discharge tubes (up to 400V)
Electric fires, fan heaters, radiant heaters (burns and electric shocks)
Heavy masses (feet, lifting, whirling, beam collapse)
Lasers (classes-danger to eye)
Hazards in Physics (3)
Bell in jar/collapsing can (implosion/explosion-scattering of material)
Steam engines (exploding boilers, fuel ignition)
Strobes/signal generators (possible migraine or epileptic trigger)
Viewing sun (care when focusing rays)
Wires/strings/plastic filaments (breakage under tension producing whiplash injuries)
Radiation (headaches, eye damage, skin ‘burning’, cell damage)
Hazards in Physics (4)
Think it out (use your common sense)
Ask about (teachers/technicians)
Try it out (practice practicals)
Find it out (refer to documentation-
DfEE (1996) Safety in Science Education HMSO
General Principles
Full transcript