Questions regarding chemical and lab safety. This includes questions about proper lab procedure, safe chemical handling, and such.

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4
votes
1answer
270 views

Do chemicals have an expiry date?

A bonus question would be, if so, why? Is it because it decomposes and hence the expiry date is calculated out?
2
votes
0answers
24 views

Cleaning up equipment contaminated with ethidium bromide?

I want to clean up some old equipment that was used to visualize nucleic acids with ethidium bromide. It's a UV table, built from glass and metal (stainless steel, I assume). Ethidium bromide is ...
4
votes
2answers
68 views

How ‘lively’ would this ‘health’ potion be?

I’ve stumbled across a rather peculiar recipe for a allegedly ‘health’ potion in a computer game, composed of an unspecified amount of each of the following: rust (iron oxide) saltpetre (potassium ...
29
votes
6answers
7k views

Do all salts taste salty?

Recently, I am learning the production of soluble and insoluble salts. My friend and I have done this experiment at the school lab. However, we want to taste them to see whether they are salty are ...
3
votes
1answer
35 views

Is there a way to contain fluorine gas for long term so that it can be visually observed?

Bromine, chlorine and iodine can all be sealed in a glass container for display without the elements reacting with the glass. But if you try to seal fluorine in glass I believe it will react and fog ...
2
votes
3answers
66 views

What are the dangers of handling 0.12N sulfuric acid?

I'm handling 0.12N of sulfuric acid for a science experiment that I am carrying out for a school project. I hear about all these terrible effects if it's ingested, inhaled, or gets in contact in skin. ...
2
votes
1answer
27 views

How effective is sulfur in detecting mercury vapors

I've read that powdered elemental sulfur will react to the presence of mercury vapor in the air creating red mercury sulfide, and that an open container of sulfur can be used as a means to verify ...
0
votes
1answer
34 views

Will lye damage vinyl pool liners?

I have a nutty neighbor that said someone told them to put liquid lye into their above ground pool. I said it would eat away the lining, their answer was to only use a little bit.
3
votes
2answers
135 views

Precautions and tips for Qualitative Inorganic Analysis of Coins

I'm a highschool student and as part of an investigatory project, I have decided to analyse which metals are present in our everyday coins. I chose this because in my previous academic year, I had ...
-4
votes
1answer
65 views

How to change color of urine safely? [closed]

I am trying to find a SAFE way to change the colour of my urine, from what I have read online, Methylene Blue is relatively safe, and will change urine to blue or green. Is it safe? Can I put this in ...
0
votes
5answers
93 views

Safe drying agents for drying machine

When I was milling NaOH for some purpose, I noticed that the powder is incredibly hygroscopic. Because I have problems with drying certain chemicals safely (without extensive heating), I thought this ...
1
vote
1answer
21 views

What would chemistry seniors like to hear about industrial hygiene?

I have a master degree in physical chemistry with close to 10 years experience as a chromatographer in pharma. About two years ago I made a career change into industrial hygiene. Right now I am ...
2
votes
3answers
104 views

Why did roasting of CuSO4*5H2O hurt my nose?

I want to use copper(II) sulfate as rocket propellant additive in hope that it will alter the flame colour. Because water is not welcome in rocket fuel, I decided to dehydrate the crystals. First I ...
1
vote
1answer
34 views

About electricity and liquid products

This may sound weird but could one 'zap' some liquid like milk with electricity of a certain voltage for a 'few' seconds hoping to kill any bacteria in it? I know some people suggested some type of ...
3
votes
1answer
102 views

What is the liquid in Mathmos lava lamps?

How can I identify the liquid in Mathmos lava lamps? I have two of them with broken caps, I need to get rid of them. Can I flush the stuff down the toilet? It smells funny.
0
votes
0answers
40 views

Can I use piranha solution to clean copper out of impurities?

I have some old pieces of wire. Since I want to use copper in homemade fireworks, I'm trying to gather it from the wires. I could buy it, however harvesting is much more fun. Sulphuric acid doesn't ...
2
votes
3answers
121 views

Harmless & pungent volatile liquid for use in a stage show

If for some stage play/trick we would like to create some surprising effect in which something with a pungent odor has been released, but at the same time need to ensure that thing be absolutely safe ...
5
votes
3answers
153 views

Are radioactive isotopes of silver dangerous?

I know we all think of things like uranium as being radioactive in the nasty radiation poisoning sort of way. But do elements like silver have similar effects in their radioactive isotopes? I'm an ...
2
votes
1answer
56 views

How does potassium nitrate work as an oxidiser?

Potassium nitrate is very popular compound in pyrotechnics, used as an oxidiser. It can be mixed with sugar to make a "rocket candy", with coal and sulphur to form black powder. You can stick it on ...
0
votes
0answers
24 views

Does potassium nitrate + sugar solution degrade?

I have created a solution of $\ce{KNO3}$ and table sugar in order to create fuse from hemp rope. I wet the rope in the solution and let it dry - I repeat this process several times. It works and ...
4
votes
2answers
140 views

How to interpret the MSDS warning?

Just a quick question; I was looking up the MSDS for o-Toluic Acid for an experiment when I came across this in the "Hazards Identification" section. ...
0
votes
0answers
51 views

Algorithm that calculates damage from adrafinil?

is there such a thing that calculated damage of adrafinil based on dosage? lets say i take a dosage of 100mg/ day for 100 days, what would the affect be? how much % of my liver will be damaged? Do ...
6
votes
3answers
97 views

Could neutralisation of safe chemicals produce dangerous ones?

I'm basically thinking whether I could potentionally poison myself while neutralising strong acid/base by some weak base/acid when I accidentally spill it, touch it or when I'm cleaning reaction ...
0
votes
0answers
42 views

how to calculate the amount of N2 gas needed to displace O2 to 19.5%?

I have 900L of liquid $\ce{N2}$ stored at 500 psi. Using the Gas port of the tank the pressure is dropped to 50 psi to send through a 3/8 inch tube into another regulator to drop the pressure to 10 ...
3
votes
2answers
135 views

How do we get rid of dangerous explosive acetone peroxide and nitroglycerine?

Imagine the police (or army or whoever's job is that) found out that some maniac placed a lot of primary explosives under a building. They have evacuated the building and deactivated the trigger. ...
4
votes
1answer
2k views

Can you make napalm out of gasoline and orange juice concentrate?

According to the novel Fight Club by Chuck Palahniuk: The three ways to make napalm: One, you can mix equal parts of gasoline and frozen orange juice concentrate. Two, you can mix equal parts ...
4
votes
1answer
135 views

Is working in the chemistry lab hazardous to health in the long term?

I would like to know whether working in the Chemistry lab would be hazardous to health in the long term. Because as everyone who worked in the chemistry lab knows that they would be handling many ...
8
votes
2answers
67 views

How hazardous are peroxide-able ethers if stored properly?

This question is directed towards laboratory scientists and technicians who actually deal with ethers that can develop peroxides upon concentration (e.g. diethyl ether, THF, dioxane). I am already ...
4
votes
1answer
43 views

Disposing of Hazardous Waste: General

I'm doing a book for the African market and the syllabus asks for discussions on proper disposal of chemicals and waste products, particularly in the classroom setting. The authors said something ...
2
votes
1answer
90 views

Taiwan propylene explosions one week ago

Is it wrong way to use WATER to relieve the big disaster(propylene leak). What is a better way to relieve propylene leak in a street about large area? Any possible choice to prevent explosion?
4
votes
1answer
164 views

How dangerous is taking a bath in Coca Cola?

What can be the effects for the body to be immersed in Coca Cola for a while? A friend commented me that the coke is quite acidic (pH 2.5 if I recall properly), and we were guessing what could be the ...
3
votes
2answers
112 views

Mercury and 502 glue

I do some experiments with liquid mercury and I use a special bottle that was 3d printed (ABS plastic). To prevent leaking of mercury I use 502 glue layered around the bottle. I want to know, if it ...
2
votes
1answer
145 views

Can very dilute acids exposed to air become more concentrated as water evaporates?

If a very minute quantity spilled acid (e.g. $\ce{H2SO4}$, though the question would apply to other acids as well) is cleaned up with water (e.g. yielding a $0.0001~\mathrm{M}$ solution), and some of ...
1
vote
1answer
42 views

Are there any hazardous products that would come from mixing glass cleaner with lubricant?

Are there any known safety issues if you mix: Mr.Muscle glass cleaner GT85 spray lubricant
5
votes
2answers
102 views

Does vinegar neutralize the strongly basic compounds in cement?

I have heard that washing one's hands with vinegar is effective in neutralizing the strong bases in cement and is more effective than water. I want to know how cement burns and what bases are ...
4
votes
2answers
100 views

Safety when handling cyclohexylamine in non-industrial amounts

Today I was pipetting some cyclohexylamine into smaller bottles so that I don't have to use the liter flask every time I need a little bit of catalyst or plasticizer. I pipetted several 10-20 mL ...
2
votes
2answers
91 views

What dangerous gases could electrolysis with water and sodium carbonate produce?

My friend was very nervous when he noticed that I'm performing electrolysis in a room that we've just been residing. (it was under open window to let $\ce{H2}$ out) After a sharp argument, he made me ...
7
votes
1answer
123 views

Removing prenylated phenolics from clothing, shoes, and upholstery

I live in Southern California and sometimes hike in areas that can be overgrown with a plant called purple poodle-dog bush. As I found out the first time I went crashing through a stand of the stuff, ...
2
votes
1answer
78 views

what makes mercury vapours so harmful

I just read an experiment in which mercury has to be heated and in the same experiment there was a note saying do not inhale mercury vapours as they are very harmful I just can't get the point why ...
0
votes
1answer
366 views

Storing diuluted (~1M) Sulfuric acid, Hcl, NaOH in plastic PET bottles a bad idea?

Do I really need glass bottles if the acids and NaOH is so diluted? I thought plastics dont really react with acids. And I already have them in plastic bottles (probably a different kind). Thanks
3
votes
1answer
77 views

I heard aluminium doesn't produce fumes when burnt but the opposite happened, how?

One day I took aluminium foil(sanitary brand, don't know if you've heard it) then I casually burned it over a gas lighter then it burned and gave off Grey fumes and the foil became a dull Grey ...
-2
votes
1answer
38 views

What is the fire point of sucrose with an average particle diameter of 60 micrometres?

What is the fire point of sucrose with an average particle diameter of 60 micrometres? I can't seem to find any documentation on this, online.
2
votes
2answers
83 views

Skin permeability, for all chemicals or just some?

On skin permeability, according to Wikipedia: "Human skin has a low permeability; that is, most foreign substances are unable to penetrate and diffuse through the skin. Skin's outermost layer, the ...
4
votes
1answer
238 views

Solvent for copper(I) iodide, copper(I) thiocyanate, silver iodide for HTM deposition; safety for methylammonium lead iodide

I'm a student working in a high school laboratory that is looking to pursue research into perovskite cells for next year, but I have some solubility and safety questions. What would be a good solvent ...
3
votes
2answers
870 views

Drinking water out of a 24 year old Ether Bottle

I have an empty aluminum Ether bottle (Shipping name diethyl Ether) that I'd like to use as a large drinking bottle as this is thick aluminum. Is it dangerous? Here is some of the info on the bottle. ...
4
votes
3answers
239 views

Demountable simple fume hood

I found this build-plan recycling on the internet (I believe it was originally published in a book written by the infamous clandestine chemist Hobart Huson) which seemed interesting to me. I do not ...
4
votes
1answer
42 views

MacGyvered chlorine gas protection

I was watching Periodic Video's chlorine video, which discusses Chlorine's ferocity in stripping electrons whenever possible, and the professors mentioned its consequent use in WWII as a chemical ...
4
votes
2answers
40 views

Assessing fire hazard of compounds

Following up on a somewhat too broad question about amateur chemist safety, this will be the first to address some of the issues discussed there. I often use the NOAA MSDS database (material safety ...
1
vote
0answers
109 views

Hazardous materials handled by amateur chemists [closed]

I'm a enthusiastic and devoted amateur chemist (in disguise, I'm actually a mathematician), but lately I've been thinking to what extend it is safe to pursue my hobby. I'm after all an amateur with ...
2
votes
1answer
691 views

What concentration of sulfur hexafluoride is safe to inhale

I am an 8th grade science teacher doing a unit on density, and I want to inhale helium and sulfur hexafluoride as a fun demonstration. I am open to using any source to purchase from, and money is not ...