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

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5
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2answers
40 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
44 views
+50

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
47 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
88 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
70 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
29 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
71 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 ...
-1
votes
1answer
22 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
21 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
70 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 ...
2
votes
2answers
845 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
170 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
39 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
30 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
75 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
72 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 ...
11
votes
4answers
931 views

How can I clean my lab coat?

Over the course of my studies, my lab coat has absorbed a non-negligible amount of different chemicals, some of them nasty organic polymers, some are more insoluble inorganic compounds like ...
1
vote
1answer
52 views

Soluble salts in Ceramics Safety Question

Some ceramicists decorate pottery using soluble salts (usually chlorides and sulfates e.g. copper chloride, cobalt sulfate) which are used individually or mixed to produce different colors. I have ...
2
votes
2answers
35 views

Carbon monoxide detection without a detector

I have just been waken up by an alarm and found out that my neighbour did something terrible with his lighter. Luckily, there was no fire, only a plenty of smoke, and our flats were hermetically ...
0
votes
3answers
93 views

Safety concerns - Heating PMMA (acrylic glass) and fluorinated polymers

I have some plastic optical fiber, which consists of a thin core of PMMA (polymethyl methacrylate), covered by a fluorinated polymer. I would like to heat a bundle of these fibers to ~130 degrees, in ...
0
votes
2answers
103 views

Is this reaction safe?

For my chemistry experiment, I was assigned to produce Ammonia Sulfide and test the chemical properties of the compound. From my online research, I found out that I can mix household ammonia and match ...
3
votes
2answers
67 views

How to treat Magnesium powder and ribbon

I am a master student of nuclear physics. Due to some measurements I'd like to make, I have to use Magnesium as a beam target. Searching through the net to see it's properties I found that it can be ...
2
votes
2answers
148 views

How can I safely carry out an electrolytic etch on stainless steel without producing relatively harmful by-products?

I propose to carry out an electrolytic etch on a stainless steel plate like so: One of electrodes must be the stainless steel plate which is being etched and the surface layer must be removed. I'm ...
0
votes
1answer
35 views

Is there a danger in electrolyzing NaCl?

To make $\ce{NaOH}$ one could electrolyze a solution of $\ce{NaCl}$ in water ($\ce{H2O}$) It would go like this: $\ce{2H2O (l) + 2Cl^- (aq) + 2Na^+(aq) -> H2(g) + Cl2(g) + Na^+(aq) + 2OH^-(aq)}$ ...
4
votes
2answers
77 views

What is an effective experiment to demonstrate the safety of wearing leather shoes while experimenting in the chemistry lab?

Quite often (from my own experience anyway), one of the safety rules in a school (high school or university) laboratory is that the students must wear leather shoes. I like to demonstrate some of ...
2
votes
3answers
123 views

Why do some dentists claim mercury “leaks out” of amalgam fillings?

From a chemistry point of view, if dental amalgam is a compound of mercury and other metals, and compounds are elements which are chemically bonded, how would it be possible for mercury to "leak out" ...
2
votes
1answer
98 views

Is hydrogen peroxide safe for cleaning porcelain?

From my understanding hydrogen peroxide only reacts with bacteria in a way that it should burn them more or less. If that is true, can I then safely use hydrogen peroxide to clean my bathroom sink ...
3
votes
2answers
69 views

Is it possible to cut yourself on pyrite?

I am planning an RPG adventure where the characters might end up getting a large cubic lump of "gold", which in reality, as you might have guessed, is in fact pyrite. I also wanted to plan for the ...
0
votes
3answers
92 views

Is it safe to mix potassium alum powder with magnesium oil (made from water and magnesium flakes)?

Will mixing these two together cause a reaction of any sort? If so, is it safe and is there an order in which one should be added to the other?
0
votes
0answers
23 views

Can you heat water with chemical additives? Would it remain safe to drink? [duplicate]

I've been wondering, is there some chemical that reacts with water, causes heat but isn't toxic?
0
votes
1answer
142 views

Will a Galileo's Thermometer containing liquid paraffin explode in my car if the temperature is above 35 degrees Celsius?

I'm driving from Sydney to Melbourne (approximately 12 hours trip) and I'm wondering if it's safe to have this Galileo's Thermometer in my car during the trip if it's going to be a scorcher of a day. ...
3
votes
1answer
74 views

Is there any substance that's a 0-0-0 on the NFPA diamond?

Is there any substance that's a 0-0-0 on the NFPA diamond? Basically a perfectly safe chemical.
0
votes
1answer
57 views

What are the properties of various solutions at pH <2 that may cause injuries?

For example, why do some solutions not cause any injuries at pH 2 while HCl does?
0
votes
1answer
46 views

Safety concerns for radical halogenations of methane in sunlight?

I wanted to know about the substitution reaction of alkanes particularly interested in the reaction of methane with fluorine and chlorine.
0
votes
0answers
211 views

Perfluorobutanesulfonic acid (PFBS) Safety and Toxicity

I was wondering if anyone had any experience with PFBS or PFOS (perflurooctane sulfonic acid)? I am thinking about trying to purchase some of these fluorosurfactants in bulk in order to (hopefully) ...
1
vote
1answer
196 views

Storing chloroform

I'm going to be aliquoting out ethanol-stabilized chloroform into smaller containers. It's presently in a large bottle sealed with a rubber(y) sheet so I can only draw it out with a needle. My ...
1
vote
1answer
57 views

How to prevent petrol from being flammable?

Is there any way to prevent petrol from being flammable without losing it's solvent properties? Preferably some affordable way that is applicable for DIY. In my case, petrol is used for bearing ...
3
votes
2answers
151 views

How to quickly cool a test tube without cracking it?

Is there a way to safely cool a heated test tube quickly without cracking it due to sudden thermal stress in the glass? One thing that I tried was blowing on it, cooling it in slightly lukewarm water ...
1
vote
2answers
261 views

Why do pharmaceutical drugs have a expiration date?

Every now and then you reach into the bathroom cabinet to find that some pill or ointment you where planning to use has gone past its expiration date. I am interested whether this expiration date has ...
2
votes
1answer
127 views

Rotary Evaporator Cleaning

I am using a rotary evaporator ('rotovap') in my lab mainly with dichloromethane as a solvent. Usually between experiments I clean the receiving and boiling flasks with a brush using soap and water ...
1
vote
2answers
257 views

Is it dangerous to inhale the steam coming from electrolysis of salt-water solution

Is chlorine in there that accumulates (at the anode) and emerge out as chlorine gas? I was worried since I added a pinch of salt to the steamer inorder to hasten the heating of tap water when I caught ...
7
votes
1answer
152 views

Consequences of using reagent preserved with sodium azide on gold film

I am running experiments using reagents preserved with 0.1% sodium azide, which are applied to a gold film. Unfortunately, there are very few options for using reagents without sodium azide. I ...
4
votes
1answer
73 views

Safe, easily detectable gas or aerosol for testing fume hoods

I've recently started undertaking a project to construct a small fume hood. So far I'm considering its use for soldering, 3d printing with ABS and polystyrene, and PCB etching using a muriatic ...
2
votes
1answer
145 views

Peltier Bismuth-Telluride toxicity

From what I understand, the working agent inside a peltier cooler is Bismuth-Telluride. I've read a toxicity data-sheet regarding Bismuth-Telluride here: ...
0
votes
1answer
171 views

How to disarm and correctly dispose of tear gas spray?

I have a can of spray for self-protection which has expired way back in 2008. It hasn't been used at all, and it doesn't seem a good idea to just throw it away without disabling it somehow first. I'm ...
14
votes
6answers
27k views

Is it actually possible to dispose of a body with hydrofluoric acid?

In the TV show "Breaking Bad", Walter White frequently gets rid of people who get in his way by submerging them in a plastic container full of hydrofluoric acid. This, at least in the TV show, ...
9
votes
3answers
2k views

Please explain why dioxygen difluoride is so dangerous

I just read this article that mentioned that dioxygen difluoride is very dangerous. The terms it uses are "awful", "violently hideous" and "deeply alarming". But I couldn't get a handle on exactly ...
1
vote
3answers
1k views

Isopropyl alcohol forming peroxides

I read in many MSDS that Isopropyl alcohol tends to form peroxides (by reacting to air OR light) which may explode when they reach a given concentration. For example: ...
10
votes
3answers
2k views

Is there any substance that's a 4-4-4 on the NFPA diamond?

A lot of the organometallics are rather... interesting compounds to work with. The most famous (among those who care, anyway) is tert-butyllithium or t-BuLi. It is the textbook example of a pyrophoric ...
2
votes
1answer
62 views

What is a level 4 carcinogen?

My friend spilt a "level 4 carcinogen" on their lap. What is it and how dangerous is it? They had washed if off after.