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

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Making Liquid CO2

I recently saw a video on making liquid $\ce{CO2}$: https://www.youtube.com/watch?v=8AN_XMcD3yI Basically we seal some dry ice in a container. As the dry ice sublimates the pressure inside the ...
2
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1answer
325 views

Can ingredients in Tiger Balm cause any harmful effects on PVC figures?

My roommate often uses Tiger Balm and sometimes browses through my collection of vintage Star Wars figures. Can the residue on his fingers cause harm to the PVC figures or cause the paint to crack or ...
2
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1answer
48 views

Bulging Li-ion battery – is it an immediate danger? What’s the likelihood of explosion?

I have a macbook battery that shows as completely dead (doesn’t hold the laptop on even for a second). It now started bulging, and in last week it inflated to about 50 % extra thickness, like this – I ...
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3answers
1k views

How to dispose of pure potassium

I have about 2g of 99.5% Potassium. I want to get rid of it, right now it's in a glass jar sealed. What is the proper protocol? I was going to combust it in water and wash it down the drain but ...
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1answer
347 views

Best Fuel for Potato Gun

I have been using deodorant to propel potatoes (potato gun :D), but I want to switch over to pure butane. However, in order to do this safely I have to know how much butane is typically in deodorant ...
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1answer
76 views

Boiling dish soap

Is it dangerous to boil dish soap (natural, ex: walgreens brand "ology") while also cooking other foods in the kitchen (ex.pasta)? I was trying to clean some pots and read online that a good way to ...
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1answer
130 views

Aluminium and water safety

I have a 8000 gallon water tank that has always had pristine clear water. I have a brass float valve at the top input to the tank. Someone put an aluminum ladder in the tank (15 ft deep tank) and ...
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1answer
31 views

Is pigment grade titanium dioxide likely to contain any impurities that are toxic?

I have a bag of titanium dioxide of pigment quality, unknown source. I am curious to know if the manufacturing process of titanium dioxide makes it likely that it contains any toxic by products / ...
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1answer
36 views

Distillation Heating Mantle Setup

In my lab courses, we were taught to use textbooks off the shelf as elevating props to adjust the heights of heating mantles to the right height during distillations, but I was wondering if there was ...
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2answers
64 views

Are aqueous solutions of oxidizing agents safe?

In the "reducing agent" article in Wikipedia it says Good reducing agents are reagents that deliver $\ce{H2}$. Wouldn't that make water unsafe to dissolve oxidizing agents?
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2answers
112 views

Proper use of vacuum pump during vacuum distillation

I am preparing to do a vacuum distillation and am unsure exactly how to manage the vacuum. The vacuum pump I have is a two-stage rotary vane pump which is capable of 250 microns or lower. It has a ...
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1answer
62 views

how to destroy excess iodomethane in reaction mixture?

I have used iodomethane to make a phenolic $\ce{OH}$ group to $\ce{OMe}$ group in Aq+Methanol medium. I have added water to precipitate the product of mine and will evaporate the solvents but I cant ...
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1answer
61 views

Are there substances people can put on themselves to prevent catching fire?

This can be very useful for people who are afraid of spontaneous human combustion! But seriously, I heard there are non-harmful chemicals used in some fire extinguishers, so can they maybe be put on ...
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1answer
76 views

Separate precious metals from catalytic converter

I am looking to separate the small quantities of platinum and palladium in a catalytic converter. However since these are very inert metals I am unsure how to proceed about doing so. Melting the ...
2
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1answer
32 views

Capacitance and flammable liquid

I'm trying to attach a sensor to some tubes to measure the level of liquids in them. see here One tube contains toluene and the other contains Recosol R55 (shellite). I'm thinking of using a ...
7
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1answer
101 views

What would happen if someone consumed a Silica Gel Packet? [closed]

Most packaged goods have the tiny Silica Gel Packets packed along with a clear warning on every single packet. My question is, What exactly would happen if someone actually consumed the contents?
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1answer
32 views

What chemicals would make lime sulfur dip to produce a green colored smoke?

I work at an animal shelter that uses lime sulfur dip to treat ringworm. We had an accident where someone mixed bleach instead of water with the lime sulfur dip which caused us to go through ...
2
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1answer
157 views

Mixing solvents and other compounds - safety issues

I would like to know if it is safe to mix organic solvents together or organic solvents with some compounds listed below. In a mixture with random ratios (greater than zero - all chemicals present) ...
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1answer
39 views

Safe way to extract hydrogen from water through electrolysis [duplicate]

I've done some research on google but most guides I've seen recommend adding salt to the mixture for better conductance which results in release of chlorine. Is there a way to perform electrolysis on ...
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1answer
33 views

What fraction of hydrogen in air results in an explosive mixture?

I would like to know if there is documented evidence of the quantity of hydrogen to air that must be present in the mixture to risk explosion or flame.
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1answer
89 views

Containers to reduce radiation exposure [closed]

A scientist has a sample of uranium-238 (U-238) that is decaying to thorium-234 (Th-234). During the transmutation, a gamma ray is emitted from the nucleus. The thorium-234 daughter particle does not ...
7
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1answer
81 views

Smoke alarm ion neutralisation

Smoke alarms are a necessary part of many modern day buildings, especially in laboratories and of course, the family home. According to the World Nuclear Association page Smoke Detectors and ...
4
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1answer
56 views

Can organomercury compounds synthesize accidentally from household cleaning products? [duplicate]

I had broken a CFL partially on carpet last week. It was a spent bulb, and the outer glass shell broke but not the fluorescent tube - apparently the tube did have a small hole in it which found out ...
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1answer
168 views

Why would sulfuric acid turn gray/black?

About 2 years ago I purchased 2 liters of 98% concentrated sulfuric acid. It's in a standard poly bottle with leakproof lids, and originally was clear. Recently I noticed the acids have turned a dark ...
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2answers
430 views

Can dimethylmercury originate from cleaning up a broken thermometer with disposable wet wipes?

I broke a CFL in my home (so elemental mercury is present in a small amount) and wiped up some of the mess with a clorox wipe. The wipe in question contains dimethyl benzyl ammonium chloride and ...
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0answers
32 views

Will the sulfur-iodine cycle and Haber Method work at lower pressures and temperatures?

I have a year-long research project next year in my senior year of high school, in which we have to make some product or prototype to solve some issue. My interest was in the Liquid Fluoride ...
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2answers
38 views

NaClO Concentration

In my previous occupation the usage of bleach--$NaClO$--I found was quite staggering, and based off of the health issues that I and other coworkers were having, I wanted to see how close we were ...
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1answer
131 views

What reaction is happening when a lithium polymer battery “is on fire”

When something goes wrong with a lithium polymer battery (as are commonly used to power electric models and robots), and it "catches fire", what is actually happening? What gas or gasses are being ...
8
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2answers
143 views

How to store methanol

We will be buying methanol by a about 200 liters at a time, I was wondering what I should consider when storing it. So far I know that it should be in the shade earthed with a copper stake in a ...
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2answers
373 views

Learning about explosives

I was wondering why temperature regulation is an important factor in producing explosives. I know many are exothermic reactions but what would happen if you did not use an ice bath and allow the ...
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1answer
73 views

How it is possible to make Aqua Regia in the lab?

How to make "Aqua Regia" in the lab conditions? Which lab equipment must be used?
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0answers
134 views

how to calculate the gas volume per purge when I change the cylinder?

I have some gas cylinders in a gas cabinet. Every time I change the cylinder, I use N2(100%v/v, 60L/min) to purge the residue gas in the pipe to a local scrubber. I want to know how many gases I ...
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0answers
37 views

Do ethanol and phenylethanol share the same properties?

I was hoping to know whether or not ethanol and phenylethanol share the same properties, i.e. do they both cause intoxication or does the phenyl group change the characteristics of the phenylethanol?
2
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1answer
75 views

Hydrogenation at atmospheric pressure in amateur environment

I was planning on doing some small scale hydrogenation practicals at atmospheric pressure (probably from Vogel) and ran into a couple of questions. I will be using the "balloon method" (described in ...
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0answers
47 views

At what scenario will a LCD monitor that used mercury inside their lamp be harmful

Small amount of mercury and/or mercury vapors is harmful to human as it can cause damage to vital organs such as brain, heart and so on. However, there are many electronic devices such as LCD monitor ...
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1answer
117 views

How to remove a stuck stopper from a flask

I had a question about how about how to remove a stopper that has been stuck in the neck of a 100 mL round bottom flask since I forgot to wipe the neck of the flask. A salt was formed in the 100 mL ...
13
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2answers
144 views

Safety in handling of concentrated ammonium fluoride

I recently saw a protocol for extracting organic materials that are bound in the silica matrix formed by diatoms. The extraction protocol used 10 molar ammonium fluoride ($\ce{NH4F}$). I briefly ...
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1answer
56 views

Could PNP (Silicon) transistor be toxic when exposed to air\light?

The story goes as follow: While I was in the electronic room I got bored and crushed a PNP transistor (Model CDIL 2N2907) using a rotating pipe jaws just like in the picture bellow. Now, it took me ...
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2answers
103 views

What stopper will stop HCl fumes?

The local hardware stores actually sell chemicals in recycled beer bottles with plastic stoppers as lids. The bottle of hydrochloric acid I bought is clearly losing gas to diffusion through the ...
3
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1answer
91 views

Testing for the presence of Hexamethylenetetramine / Formaldehyde [duplicate]

I read in Russian popular articles that it is allowed to preserve herring/fish with Hexamethylenetetramine in Europe. Since Soviet times, I like to buy salty herring and marinade it with Vinegar. The ...
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2answers
140 views

Mimic a volcano eruption with household chemicals?

How can one mimic a volcano eruption using household chemicals safely? We've tried it in a testing tube with baking soda and vinegar. This wasn't quite as impressive as expected. On the web we've ...
3
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1answer
55 views

What safety measures should I take when operating a backyard aluminum furnace

I have made a DIY furnaces out of cement. Before I do any smelting, I would just like to take any suggestions in regards to any safety measures I should take. I plan to only melt aluminum cans and ...
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1answer
59 views

Hydrogen can be stored? [closed]

Please tell about the hydrogen gas storage and the pressure created in tank. what is the calorific value of hydrogen gas when it is burnt?
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2answers
249 views

Methanol skin exposure serious or not? [closed]

I have just minutes ago been splashed with industrial grade methanol. It seemed like a small amount (1-3mL) on my skin. I already washed the affected area thoroughly with soap and water. Online I've ...
3
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2answers
87 views

What kind of fire extinguisher for chemistry at home?

The are various types of fire extinguishers. They can be based on water foam dry powder carbon dioxide wet chemicals halon etc. Suppose one is learning chemistry at home. What type of fire ...
4
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1answer
236 views

Is it possible to make metal fulminates?

Is it possible to make fulminates such as: magnesium fulminate, copper fulminate, etc. by the metal + $\ce{HNO3}$ + $\ce{EtOH}$ reaction?
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1answer
136 views

Organizing my “chemical” cabinet

I'm reorganizing my garage (I do metalworking and some machining), and now I have an empty white cabinet that I'd like to dedicate to chemical stuff. I'm not a chemist, and I don't have the typical ...
3
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1answer
417 views

Would nicotine at 27g per 1.5ml be lethal? [closed]

Before giving up smoking, I looked at ecigs and found that spillage on skin or ingestion could be fatal. Would a cartridge that holds 1.5-2ml of liquid at 27mg (1.8 v/v) be 27mg per drop or for the ...
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2answers
57 views

Soil organic carbon digestion methods - safety

I have several ground up soil samples that I need to get fractions from. The fractions are based on the Century Soil Model. Briefly, the fractions relate to the approximate time frame it takes for an ...
3
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1answer
56 views

How is the process of creating PVC fabrics harmful for the environment?

I often hear that the production process for PVC fabrics (such as those used in Gucci and Versace handbags) is very harmful to the environment. What part of the process is harmful and can this be ...