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Important safety hints for users |
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Important safety hints for users!
When working with glass, the limitations of this material in regards to thermal shock and mechanical loads should be taken into account and strict handling precautions adhered to:
- Before DURAN® laboratory glassware is used it should be checked to ensure that it is suitable for the intended purpose, and that it will serve its purpose without difficulties.
- Defective laboratory glassware can present a hazard (e.g. risk of cuts, burns, infection) which should not be underestimated. If appropriate repairs to any item cannot be carried out or cannot be justified for economic reasons, it must be disposed of in the proper manner.
- Damaged volumetric glassware such as volumetric flasks, measuring cylinders, etc. should never be repaired. The effects of heat can leave stress in the glass (with very high risk of breakage!) and permanent volume changes can occur.
- Never subject glassware to sudden changes in temperature. This means that hot items should not be taken out of a drying cabinet and placed on a cold or even wet laboratory bench. This applies especially to thick-walled glassware such as filtering flasks and desiccators.
- When assembling apparatus make sure by using appropriate support material that it stands firmly and is not subjected to stress. To compensate for stress or vibrations PTFE bellows or similar should be used.
- Glass equipment that is under pressure or vacuum must be handled with care (e.g. filtering flasks and desiccators) to avoid damaging the surface.
- To avoid stress in the glass, items under vacuum or pressure should not be heated on one side only or with an open flame. When working under pressure the maximum parameters indicated in the DURAN® catalog should not be exceeded.
- Before using glass equipment under vacuum or pressure it must always be inspected visually to check that it is in perfect condition (no serious scratches, abrasions, etc.). Damaged glassware should not be used for work with pressure or vacuum.
- Never subject glassware to sudden changes in pressure, e.g. always vent items that are under vacuum smoothly. Laboratory glassware with flat bottoms (e.g. Erlenmeyer and flat bottom flasks) should not be used under pressure or vacuum.
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ACHEMA Frankfurt, Germany
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