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== Liquid Chemical Demonstration Safety == A wet chemical is a chemical substance in the liquid phase, also known as wet chemistry. If you are dealing with chemicals in a powder form, please see Dry Chemical Safety. <!-- EDIT: "Liquid Chemical" refers to two things. Any chemical compound used which is normally in the liquid state, such as Acetic Acid or Hydrogen Peroxide, is the first. The second is any chemical solution that we use, such as the Shaking Solution demonstration which contains aqueous Sodium Hydroxide and Glucose. --> *'''Required Safety Gear:''' A small blast shield, safety googles *'''Recommended Safety Gear:''' A lab coat, for specific chemicals rubber gloves may be needed *'''Required Dress:''' Closed toe shoes, jeans, t-shirt. * Properly label all chemicals and date when they were opened ** Make sure to dispose of the chemicals before the expiration date and dispose of accordingly to the label's directions <!-- "** If making KI solutions, date and label when made" - This is an oddly specific point to make about dating and labeling chemicals, especially considering it isn't one of our "dangerous" ones. - A blast shield is not always required for liquid chemical demonstrations (shaking solution, bouncing raisins, etc.). brevity is good, but be careful to not make them too brief, or you risk making misinformation. "* Store flammable and combustible materials in the approved storage cabinet" - This is a point that should be listed within the Fire Safety section, not here. "* Do not ever store chemicals higher than eye level, on top of a storage unit or on the floor." - What constitutes as eye level? I will admit that this is not a point I had thought about, so thank you for bringing it up. "* Make sure to have a safety shield and fire extinguisher on hand" - See blast shield comment above. Also, unnecessary reminder for fire safety. --> * Dealing with volatile substances, make sure to do so underneath a fume hood or an area with appropriate ventilation * If a flammable liquid is used in a demonstration, make sure to cap all reagent bottles after dispensing the appropriate quantities and be aware of heat sources and flammable vapors. Never repeat a demonstration using flammable liquids until all containers and surfaces are cool to the touch. <!-- - Mention of a fume hood is a moot point, since we don't have one and we likely will never use one while presenting at a school. - Talking in regards to flammability is redundant. instead summarize it as "if the substance is flammable, please see the Fire Safety section of the Demonstration Safety page". - The points above could be used as a starting point for talking about the different types of liquid chemicals. When doing so, be sure to define the categories, and any specific terms that new volunteers/officers might not be familiar with. Be sure to cover safety topics when it comes to the following categories: 1. Volatile Chemicals: Chemicals with high volatility, and are often flammable as well (Methyl/Ethyl/Isopropyl alcohols, Acetone, etc.) 2. Reactive Chemicals: chemical solutions that are highly reactive. This would include catalytic, acid and base solutions (Sodium Hydroxide solutions, Sulfuric Acid solutions, Hydrogen Peroxide 30%, etc.) 3. Inert Chemicals: solutions that are non-reactive and pose no sort of threat to the audience (Baking soda & vinegar, Sodium Acetate AKA "Hot Ice", Oobleck, etc.) --> * Any volunteers must also wear approved safety gear (goggles/gloves/coat if needed) <!-- I feel that this point should be listed at the top with all the other safety gear points. --> <!-- "* If a minor wet chemical spilled:" "** Protect yourself and alert others" "** Contain spill and secure the area" "** clean up the spill using a chemical spill kit or vermiculite" "** Place spill material in compatible container and label it" - Keep in mind while writing these steps that they will be read by students who are not familiar with basic Chemistry. using phrasing as "protect yourself and alert others" could scare new recruits, and can leave some students feeling overly concerned about experiments that are perfectly safe for them to present. - You may want to write a few different sets of spill cleanup steps for different categories of liquid chemicals. -- Volatile chemicals (acetone, various alcohols) are handled differently from reactive solutions (diluted sodium hydroxide, diluted sulfuric acid, hydrogen peroxide, etc.), which are handled differently from inert solutions (oobleck, sodium acetate AKA "Hot Ice"). -- Volatile chemicals need to be absorbed quickly to minimize fire risk (if applicable) and vaporization, so for a small spill you can use a paper towel and a large spill can use a spill agent such as vermiculite or baking soda. -- A reactive solution may need to be neutralized, so a spill agent such as baking soda would work efficiently for a spilled acid, but not for a spilled base. Also, depending on the concentration, the presenter may need to wear rubber/latex gloves while cleaning up a reactive solution. Lastly, a presenter would NOT want to use paper towels for a spilled reactive solution if it is concentrated; concentrated strong acids can cause paper to ignite, and the concentrated hydrogen preoxide we use will cause it to turn black and deteriorate in your hand. the spilled solutions would need to be diluted or neutralized before attempting to wipe it up. -- Inert solutions don't usually need a spill agent, and might actually need to have water added to dilute them and help clean up. not only that, but inert solutions don't pose a risk to anyone, so it shouldn't be necessary to "protect yourself and alert others" or "contain the spill and secure the area" for spilled Oobleck. - For these steps, you need to list them simply. An example list of steps is: Volatile liquid chemicals: these are chemicals which readily vaporize into the air around them. some of these chemicals are flammable, and so a spilled volatile chemical can pose a fire risk. 1. If it is a small spill (amount spilled is less than 100mL) then use paper towel or similar to quickly absorb it. Dispose of the towel in a trash bag or bin. 2. If the amount spilled is larger than 100mL, then use the spill agent from the Safety Box to absorb it quickly. Once absorbed, scoop it with a dust pan or similar and dispose of it in a trash bag or bin. 3. If the chemical spilled was a flammable chemical, please follow the appropriate guidelines listed in the Fire Demonstration section of the Safety page.--> <!-- * If a major wet chemical spilled: ** Get everyone out of the environment ** contact ORCBS as soon as possible at (517) 355-0153 or www.orcbs.msu.edu - You need to clarify what would constitute as a "Major wet chemical spill" (MWCS). Also, This does not look like the kind of issue that we will ever need to be concerned with, so I'm unsure on if it needs to be stated in here at all. This is a statement that should be included on a separate safety form for those who prepare the diluted solutions. - We would only follow these guidelines for a MWCS if it happened on MSU's campus. If we were at an event and it happened, we would want to make sure that 911 was called before anything else, so that they can get a local chemical containment partner to come in. In any case, I cannot conceivably think of a scenario that this would be a concern, and so it seems unnecessary to list. - We never bring anything to schools that would require a response to this degree. The most hazardous solution we bring to events would be the Hydrogen Peroxide solution, which can be easily neutralized on the spot if spilled by pouring a small amount of the catalyst straight into the spill, and otherwise using the spill absorbent that is in the safety box to take care of it. Although we have some strong chemicals in the planetarium, we don't bring them to schools, and they are only used to prepare diluted solutions for demonstrations. -->
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