42. Water baths
41. Van de Graff generators
40. Vacuum concentrators
39. Ultraviolet transilluminators
38. Thermometers
Equipment, hazardous materials and processes 35. Stains for biological tissues or materials 36. stroboscopes (light) 37. Syringe needles The general guideline is to thoroughly understand the operating instructions before using the equipment. Adult supervision is essential, especially when younger students are handling the equipment, store away from students' reach when not in use. All breakages, accidents and spillage must be reported immediately to the teacher. The mercury must not come into contact with the body. A full face shield or safety face mask must be used. The lamp should be turned off after use.
Low
Electric wiring. Short-circuiting. Electric shock Danger of scalding.
~H-291~
Fill the bath to at least half the height of the inner chamber. A "HIGH TEMP, DO NOT TOUCH" sign should be displayed to alert users if the temperature setting is higher than 60 째c. Ensure that the bath is turned off at the end of the day.
It is important for users to thoroughly understand the operating instructions before using the equipment.
Low
Low
The equipment must not be used to evaporate substances with low flash points.
Moderate
Low
Moderate
Moderate
Adult supervision essential. Gloves and lab coats must be worn.
Moderate
Potential carcinogen and mutagen on prolonged contact. Spinning discs. May cause bodily injury.
Sharp objects. Possibility of cuts and punctures. Mercury vaporised from broken thermometer. Harmful if inhaled Ultraviolet radiation. Harmful to the eyes. May cause skin burns. Toxic or flammable vapours. Harmful if inhaled. Fire can occur in the presence of ignition sources. Electric shock.
Existing control measures / safety guidelines
Risk evaluation
Hazard and possible accidents/health risk
School Science Laboratory Safety Regulations
Electrical equipment should be handled with care. Equipment, switches and electrical wires must not be handled with wet hands. If liquid-bulb thermometers are used to determine the bath temperature, caution must be exercised to avoid breaking the thermometers and possibly having the liquid (mercury or alcohol) spilling into the bath.
Gloves and laboratory coats should be worn in addition to full face shields or goggles. Avoid touching the equipment surface as it may be hot. When evaporating poisonous liquids, explosive liquids or infectious materials, a suitable chemical or cooling trap should be used to ensure the required condensation and separation of the vapour.
Ensure apparatus are arranged in a stable manner and positioned without obstruction. Used sharps should not be bent or broken but simply disposed in a container for sharps. Do not overfill sharps containers to reduce chances of overflow or protrusions. The clearing of the spill should be done by the teacher or laboratory staff.
Wash area of contact thoroughly.