Which process should be done in fume hood?
Safe Fume Hood Work Practices
- Conduct all work and keep all apparatus at least 6 inches back from the face of the hood.
- Keep the hood sash closed as much as possible.
- Keep the hood slots and baffles free of obstruction by apparatus or containers.
- Do not permanently store apparatus or chemicals in the hood.
What is a fume hood and how should it be used?
A chemical fume hood is a ventilated enclosure used to trap and exhaust vapors, gases, and nanoparticles. The exhaust fan is typically stationed at the top of the building and pulls air through the duct work connected to the hood and exhausts it into the atmosphere.
What chemicals should be used in a fume hood?
Flammable solvents, corrosive acids, corrosive bases, combustible or potentially explosive concentrations of gases, irritating vapors or dust, asphyxiating gases, or open sources of volatile radionuclides are all examples of materials that must be used inside of a fume hood.
Which is a proper practice when caring for or using the chemical fume hood?
Good Work Practices Keep the hood sash closed as much as possible. Keep the hood slots and baffles free of obstruction by apparatus or containers. Do not permanently store chemicals or apparatus in the hood. Large equipment used inside the hood should be placed on blocks to allow airflow under the equipment.
What is the chemical route of entry?
The four main routes of entry are inhalation, ingestion, injection, and absorption through the skin and eyes.
What is the best procedure in smelling chemicals?
If you need to smell the odor of a chemical, waft or fan the fumes toward your nose with one hand. Do not put your nose over the container and inhale the fumes.
How do you clean a chemical hood?
Clean the interior and exterior surfaces and sash periodically, and after spills, using deionized water; then wipe the areas down with a soap solution and rinse. NOTE: Personnel should wear appropriate PPE when cleaning the fume hood to protect themselves from the chemicals.
How often should chemical fume hoods be inspected?
For fume hoods, they are primarily concerned with airflow at the face of the hood, monitoring, maintenance, and exhaust. OSHA indicates that the quality and quantity of ventilation should be inspected at installation, then regularly monitored at least every three months.
What should you do before each use of the chemical fume hood?
How to protect yourself and others
| Before Work | During Work |
|---|---|
| Verify the hood is working properly | Keep your head outside of the hood |
| Set sash height (no higher than arrows on side) | Avoid rapid movements |
| Do not position fans toward hood | Conduct work at a minimum of 6 inches from front (face) of hood |
How far should you work inside a chemical exhaust hood?
While working inside the hood keep the hood sash closed as much as possible while still allowing comfortable working conditions (never more than 18”). Do not remove hood sash or panels except when necessary for apparatus set- up or removal.
Is PPE required when using a fume hood?
But the fume hood can’t do everything for you, and that’s why you need to wear your prescribed PPE whenever working with substances that require a fume hood. A face mask and/or shield, a gown, gloves: all these things will protect you from getting something dangerous on yourself.
What are the four 04 common routes of entry of chemicals?
There are four major routes by which a chemical may enter the body:
- Inhalation (breathing)
- Skin (or eye) contact.
- Swallowing (ingestion or eating)
- Injection.
What are the three primary methods of chemical exposure?
The different ways a person can come into contact with hazardous chemicals are called exposure pathways. There are three basic exposure pathways: inhalation, ingestion, and skin contact.
What safety precautions should be taken when handling the chemical?
Use protective equipments for eye protection and make sure to wear a laboratory coat. Avoid intentional smelling, inhaling and tasting of chemicals. Always avoid direct contact with chemicals, far from your hands face, clothes and shoes. Hazardous chemical should be used only as directed.
What are the general rules for handling chemicals?
General rules for handling chemicals
- Do not return chemicals to their original packaging.
- Keep chemical containers closed.
- Never use a wrong or an unmarked reagent.
- Never put spatulas, stirrers or other objects into a storage container for chemicals.
How do you test a fume hood?
Testing Procedures: Position the sash fully raised. Puff smoke around the opening of the hood by using Ventilation Smoke Tubes (or other visible smoke device). All smoke should be captured by the hood exhaust and not be blown into the room. Position the sash so that the fume hood raised opening is 18-inches.
Which of the following should be checked prior to using a fume hood?
Verify sufficient inward airflow before using a hood by checking the hood’s airflow indicator.
What is the most important step to take after handling a hazardous chemical?
After handling any hazardous material, wash thoroughly with soap and water. Clean work surfaces at least once per shift, so contamination risks are minimized.
What is a chemical fume hood?
A chemical fume hood is the main piece of laboratory equipment that protects laboratory staff working with hazardous chemicals. When properly used, fume hoods protect staff from inhaling chemical gases, vapors, and aerosols. They serve as a physical barrier between staff and the hazardous materials inside…
How do you use a fume hood in a lab?
The fume hood can provide adequate protection for most laboratory processes if it is used correctly. The fume hood must be operated with the sash no higher than the red arrow. Detailed instructions for use of the fume hood can be found in the Lab Safety Manual.
Do I need to decontaminate my fume hood?
Fume hoods used for work with chemicals, biologicals, or radioactive materials must be decontaminated and washed before being repaired, moved, or discarded. Decontamination methods will depend on the materials used inside the hood.
How does a fume hood protect workers?
A properly operating and correctly used fume hood will protect workers by containing vapors, dusts, gases, and mists. The sash can also act as a shield to workers from splashes and minor explosions or fires that may occur inside the hood.