5Chemical ProcurementBefore chemicals are ordered, the following questions should be considered:What is the least hazardous chemical available that can be used?How should the chemical be stored?CHEMICALSTORAGEAREAWhat is the minimum quantity needed to complete the experiment?Is the laboratory equipped to handlea spill?Is the chemical already available? Check your laboratory chemical inventory.Are personnel trained on how to safely handle the chemical?
7Chemical StorageThis section will first discuss general considerations and requirements for chemical storage. Next, it will provide specific information for the storage of chemicals by hazard class.
8Chemical Storage- Requirements There must be an inventory list of hazardous chemicals. Chemical containers must be labeled with a minimum of chemical name, hazard warnings and target organs. Containers shall be dated when received and opened. Accompanying material safety data sheets must be kept.
9Chemical Storage General Considerations: Plan ahead for spills, accidents or emergencies.Be aware of special storage conditions such as temperature, relative humidity or limited shelf life.Segregate chemicals by hazard class or compatibility.
10Chemical Storage General Considerations: If available, use ventilated cabinets for volatile toxics and odoriferous chemicals. Use approved flammable storage cabinets for flammable liquids. Use secondary containers or trays for corrosives and toxic solvents.
11Chemical Storage General Considerations: When refrigerating flammables, only use refrigerators specifically designed for flammable materials. Do not store food in chemical storage refrigerators. Label chemical storage refrigerators with the following: No Food – Chemical Storage Only
12Chemical Storage General Considerations: Avoid storing liquid chemicals above eye level. Avoid storing chemicals in aisle ways. Avoid over stocking shelves. Avoid storing heavy containers above shoulder level. Avoid storing chemicals in fume hoods or on counter tops. Avoid storing chemicals near sources of heat or in direct sunshine.
13Chemical Storage – Hazard Class At a minimum, chemicals should be segregated as:CorrosivesOxidizersFlammable LiquidsPoisons or Toxic ChemicalsReactive (water or time sensitive)
14Chemical Storage – Corrosives Store concentrated acids and bases separately. Keep corrosives away from organic chemicals and combustible materials. Use secondary catch basins for concentrated acids and bases.H+OH-
15Chemical Storage – Store in approved safety cans or cabinets Segregate from oxidizing acids and oxidizers.Keep away from any source of ignition: flames, heat or sparks.Know where fire fighting equipment is stored and how to use.If volatile flammable liquids are stored in a refrigerator it must be in an explosion-proof (lab-safe) refrigerator.
16Chemical Storage –As a general rule of thumb, no more than 10 gallons of flammable liquids should be stored outside of an approved flammable storage cabinet. Hospital patient areas are typically much less (1 to 2 gallons).
17Chemical Storage – xidizers Store oxidizers away from flammable and combustible materials. Store oxidizers away from reducing agents. Maintain the minimum quantity needed and dispose of unneeded material immediately.
18Chemical Storage – To ic Chemicals Store highly toxic materials in a dedicated storage fume hood. Maintain the minimum quantity needed and dispose of unneeded material immediately. Store in unbreakable containers or use secondary containers. Label storage areas with designated area signs.
19Chemical Storage – Reactive Examples of reactive chemicals would include, but not be limited to:Water reactive chemicals.Pyrophors, which react with air.Peroxide forming chemicals, which form shock sensitive explosives.ETHER
20Chemical Storage – Reactive Consult the MSDS and labels for storage information. Bring only quantities needed for immediate use into the laboratory. Date all reactive chemicals as soon as they are received. Do not open material after the expiration date.
21Chemical Storage – Reactive Store pyrophoric chemicals away from flammables. Store perchloric acid away from reducing agents. Store perchloric acid bottles in glass or ceramic trays. Store peroxidizable materials away from heat and light.
22Chemical Storage – Reactive Store water reactive chemicals away from all sources of water or in water tight containers. Store thermally unstable chemicals in approved refrigerators. Consider explosion relief boxes for highly sensitive materials. Restrict access to the storage area.
24Transporting Chemicals If chemicals are transferred to a second container, make sure the new container is labeled with the chemical name. Use secondary containers, with handles, made of rubber, plastic or metal. Secondary containers should be large enough to contain all of the chemical contents.
25Transporting Chemicals Make sure the pathway is clear of obstructions and tripping hazards. Plan ahead for spills. Transport only the quantity needed to complete the experiment. Use sturdy carts when transporting heavy containers or transporting over long distances.
27Chemical Manipulation Be familiar with chemical properties and products of chemical reactions. Be prepared for chemical spills and clean up spills immediately. Plan ahead – have apparatus and associated equipment ready before chemicals are used. Use the appropriate equipment, such as funnels, beakers and spatulas when transferring chemicals.
28Chemical Manipulation Chemical ManipulationUse chemical fume hoods to control exposure as chemicals are transferred. Use chemical fume hoods to control exposure during the experiment. Wear the appropriate personal protective equipment (chemical splash goggles, gloves, etc.). Have disposal containers ready ahead of time.
30Before purchasing new chemicals you should? A. Check to see if chemical is already available.B. Determine the minimum quantity needed.C. Search for a less hazardous substitute.D. All the above.
31The OSU chemical hygiene plan requires? A. Inventory list of hazardous chemicals.B. LabelsC. Requires chemicals to be dated when opened and received.D. All the above.
32Chemicals should be stored? A. AlphabeticallyB. By hazard class or compatibility.C. In the chemical fume hood.D. Randomly
33Devices used to store chemicals include? A. Flammable storage cabinets.B. Specially designed refrigerators.C. Laboratory drawers.D. Both A & B
34Chemicals can be segregated as? A. CorrosivesB. Flammable LiquidsC. OxidizersD. All the above.
35Acids and bases should be stored together? A. TrueB. False
36Which is an example of a reactive chemical? A. Ethyl EtherB. BenzeneC. SodiumD. Both A & C
37Chemical storage information can be found in? A. MSDSB. LabelsC. DictionaryD. Both A & B
38An example of a secondary container is? A. Plastic TrayB. Glass BeakerC. Rubber PailD. All the above.
39Chemical fume hoods can be used to control exposure. A. TrueB. False
40Answer Key 1. All the above (D). 6. False (B) 2. All the above (D) Both A & C (D)3. By hazard class or compatibility(B) Both A & B (D)4. Both A & B (D) All the above (D)5. All the above (D) False (B)