Questions tagged [safety]

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

47 questions with no upvoted or accepted answers
Filter by
Sorted by
Tagged with
8
votes
1answer
98 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 ...
6
votes
0answers
87 views

Using Ethylene Glycol as anti-freeze in a biodigester gas storage system

I am busy building a bio-digester to produce biogas for cooking/water heating in a cold climate. I am using the 3 IBC tank solution. Tank 1 is the digester itself. Tank 2 is the gas storage unit. ...
5
votes
0answers
121 views

Toxicity of vanadium in pottery

I mix and develop glaze recipes for midfire stoneware (fired to 1220°C). The colorants in pottery are mostly iron, copper, cobalt, tin, titanium, chrome, and a few other transition metals. Many of ...
4
votes
0answers
50 views

Spraying difluoroethane into an enclosed space

I'm working on developing physics lab activities that my students can do at home during the covid quarantines. For an activity involving waves and thermodynamics, I came up with an experiment at home ...
4
votes
0answers
69 views

ZnO spontaneous combustion during transport

I found your contact information researching $\ce{ZnO}$ reactions. I was hoping you could please help me or orient me in the right direction to find an answer to my problem. The company I work for ...
4
votes
0answers
143 views

Auto ignition of tert-butyl mercaptan mixed with mineral oil

I am designing an experiment that involves immersing pieces of pipe lining in a mixture of tert-butyl mercaptan (2 %) and white mineral oil (98 %) at 230 °C (the standard temperature for the test). If ...
3
votes
0answers
25 views

316 stainless steel and high concentration, high temperature Hydrogen Peroxide

I'm looking at doing some experiments with small scale rocketry and I need to find the right materials for this project, where I will be burning through lots of HTC (peroxide above 90% concentration). ...
3
votes
0answers
25 views

Formic acid and carbon monoxide outgassing from latex mattress

Formic acid is used as a coagulant to turn rubber tree sap into latex, formic acid also decomposes to carbon monoxide. Does this mean things like latex mattresses have the potential to off-gas carbon ...
3
votes
0answers
94 views

What is the pale green solution from dissolving sodium hydroxide in a stainless steel flask?

I have previously used drain/sink cleaner gel based on sodium hydroxide but noticed that caustic soda crystals were a lot cheaper. I decided to experiment with making my own cleaner. I bought a 1 ...
3
votes
0answers
136 views

Are there any dangers while handling cobalt dichloride?

I use a desiccant named Drierite to remove water from air in experiments. It is composed of $98\%\ \ce{CaSO4}$ and $2\%\ \ce{CoCl2}$. Every once in a while the Drierite gets saturated with water vapor ...
3
votes
0answers
75 views

Safety regarding multiple metals in same acid solution

My son is testing the corrosion of metals in various solutions. Is it okay to place strips of multiple metals in the same container of a specific solution? Metals being tested: $\ce{Fe}$, $\ce{Cu}$, $...
3
votes
0answers
371 views

Brewing tea with deionized water

I am wondering what efect brewing tea (let us assume for the sake of simplicity it is green tea, brewed at about 80 °C) in deionized water might have on the product. Will the lack of ions in the ...
2
votes
0answers
23 views

At what temperature does a polyester release toxic gases?

I've bought a "Shrinky Dinks" printable sheets and now I'm feeling unsure about using it since I've read that heating polyester materials may be very harmful for health, and the final purpose of this ...
2
votes
2answers
392 views

What dangers/risks are there in the production of carbon subnitride?

I was reading that carbon subnitride or Dicyanoacetylene has one of the hottest flames when used as a fuel, but it also is unstable and can explode easily into carbon powder (no specifics on cause). ...
2
votes
0answers
95 views

Have I inadvertely diethyl ether peroxides?

About 1 week ago, I used diethyl ether to wash some solid products. I dumped it in my temporary waste container, which also contains water and some other solvents like DCM. I returned today, and ...
2
votes
0answers
52 views

Creating Floc in the classroom

I'm the youth ed manager at Denver Water in Colorado. We do a water treatment demo in the classroom, and currently we use the first part of the Winkler DO test to create floc. I'm looking for a better ...
2
votes
0answers
136 views

Identifying an unknown white oxidizing powder

I am working with a unknown white oxidizing powder that melts at around 500 degrees Fahrenheit. It turns my finger green when it comes into contact with my finger for a short while. It leaves a very ...
2
votes
1answer
655 views

Mixing Oxalic acid and glycerin

I am doing an experiment for a miticide for honey bees. I will be dissolving 600 g of 99.6 % oxalic acid in one liter vegetable glycerin at 150 °F. I have been told it will give off formic acid fumes ...
1
vote
0answers
62 views

Safety of IPA and sodium hypochlorite mixture?

Is the mixture of 97% isopropyl alcohol and 0.5% of sodium hypochlorite safe? Do they react together and form any compounds ? Does this mixture present more danger to humans and animals than its ...
1
vote
0answers
42 views

Distillation of oxalyl chloride

May I use water as a condensing medium while distilling out oxalyl chloride? As oxalyl chloride reacts with water and the products are $\ce{HCl},$ $\ce{CO}$ and $\ce{CO2},$ when there is a leak or ...
1
vote
0answers
38 views

Why chemicals bottles (plastic) have paper seals?

I have my film developer and fixer in the plastic bottles, also I have glycerine and propylene glycol. They all have paper seals (in caps) that those chemicals get wet and destroy - they just fell ...
1
vote
0answers
354 views

Why add NaBH4 slowly to 4-t-butylcyclohexanone in ether solution? [Lab Procedure]

$\ce{NaBH4}$ is to be added slowly to 4-t-butylcyclcohexanone in ether solution according to laboratory procedures, but I am curious as to why that is? 4-t-butylcyclohexanone undergoes reduction with $...
1
vote
0answers
630 views

Safest and easiest method to neutralize nitric acid

I would like to know the safest method for neutralizing 70% ACS Reagent Nitric Acid that is used in small amounts of 1-5 ml, for an electronics process in which there will be small traces of silicone ...
1
vote
0answers
349 views

What is the difference between n-heptan (CAS 93924-37-9) and branched, linear and cyclic heptane (CAS 426260-76-6)?

I am looking at the substitution of hazardous substances in my company. I would like to explain what makes the branched, linear and cyclic heptane (CAS 426260-76-6) safer than n-heptane (CAS 93924-37-...
1
vote
0answers
36 views

Distillery Transfer Hoses

I was hoping an actual person could offer me some advice. I work in a craft distillery and I'm getting a lot of mixed information on how compatible PVC is with high-proof alcohol. It definitely seems ...
1
vote
0answers
265 views

Why is Lithium Fluoride much safer than Sodium Fluoride

I've looked at the MSDS of Lithium Fluoride and Sodium Fluoride. It really seems that Lithium Fluoride is much safer to work with. Why is that, if both are in the Alkali Group?
1
vote
0answers
35 views

How to safely change the color of a fire tornado?

So I've been watching a lot of fire tornado videos and I came across one that had a reasonable and safe setup (around the 3:23 mark): Fire Tornado DIY Is there a way to change the color of the fire ...
1
vote
0answers
183 views

Aluminium etching

I'm trying to etch a very fine pitch ($\pu{0.5 mm}$) aluminium stencil for use with SMT printed circuit board making. I've done some reading on the topic and found that the safest way probably is to ...
1
vote
0answers
234 views

What is substance that has high melting point in its powder form?

In laminated glass bending process 2 glass sheet will be superposed in a furnance.The seperation powder will be interposed between layer for avoid 2 glass sheet being bound together. I'm trying to ...
1
vote
0answers
496 views

Does this wire gauze contain asbestos? Can I tell visually?

I bought a wire gauze which claimed to be made of ceramic, and asbestos-free. However, I bought it from Amazon (not a trustworthy source), and I see fibers around the edge of the center. Is there a ...
1
vote
0answers
50 views

Is it a good idea to build a small scale ozone AOP reactor in my garage?

I have some interesting findings from my work (no conflict of interest), and I have been thinking to build an ozone lab in my garage to verify my ideas. What safety issues should I be aware of? The ...
1
vote
0answers
266 views

Mirror reaction - avoiding silver nitride

I am interested in experimenting with depositing silver on glass (mirror). I've read several papers and watched youtube videos but wish to be better informed about the risk of explosion. The mixture ...
1
vote
0answers
113 views

Are there art supplies that create a new color by mixing through a chemical reaction?

When two elements or compounds react together, they form new compounds, which more often than not assume new colors. If the two elements or compounds don't react, they form uniform or non-uniform ...
1
vote
0answers
23 views

bio-compatible thermoset resin

I am looking for something rather odd and specific. I need a chemical resin that is liquid up to 250 deg. F, Is a thermoset (it cures at temperatures above 250 F), and is biocompatible in that if ...
1
vote
0answers
109 views

What are APG and AEO7 and should I be concerned?

I'm considering importing some granite cleaner for my stone business to save some money and the following is the list of ingredients: APG, AEO7, silicone oil, water, White Mineral Oil My question ...
1
vote
0answers
61 views

Endothermic Reaction with Specific Details

I need some information for a book I'm writing. Let's say you're in a confined space, about 8 feet by 8 feet. The area is being heated externally slowly (a few degrees a minute) to about 3,100 ...
1
vote
0answers
81 views

How dangerous are non-soluble trivalent thallium compounds?

I am PhD student in solid state physics. I have been working with a fine powder of a transition metal oxide containing trivalent thallium. The oxide is not soluble in water. In my university, ...
1
vote
0answers
1k 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 ...
1
vote
0answers
743 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 ...
1
vote
0answers
712 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 ...
1
vote
0answers
1k 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) ...
0
votes
0answers
65 views

Highly concentrated NaOH solution at high temperature vs borosilicate glassware and cellulose?

I've read here on stack-exchange that NaOH will react with glass through the following reaction: 4 NaOH + SiO2 ⤑ Na4SiO4 + 2 H2O I would like to briefly heat a highly concentrated NaOH solution to ...
0
votes
0answers
34 views

Safe & Convenient method to hydrate CaO into Ca(OH)2?

I'd like to prepare a solution of $\ce{Ca(OH)2}$ from $\ce{CaO}$. Ideally I guess I'd go for slowly adding the powder to a water-cooled round flask containing pure water but I have no mechanism to ...
0
votes
0answers
346 views

What is the maximum concentration of HNO3 (nitric acid) which may be handled outside of a hood?

Commercial stock solutions of HNO3 (nitric acid) are usually 70% w/w, and according to several MSDSs (e.g. here), it is dangerous to inhale it: Symptoms/effects after inhalation : Irritation ...
0
votes
0answers
579 views

What results from combining monopotassium phosphate, magnesium sulfate and calcium nitrate?

If I mix monopotassium phosphate, magnesium sulfate, and calcium nitrate together in aqueous solution, what chemicals will result? Are these safe to combine (i.e. any toxic gases, etc.)? I thought ...
-1
votes
1answer
1k views

HDPE bottle for gasoline?

What are the risks of storing E10 gasoline in a gallon HDPE container for a few months, vs storing in a proper plastic fuel can? Assuming the HDPE gallon is thick (used for Hydrochloric acid before, ...
-1
votes
1answer
134 views

Is 70% isopropyl alcohol still inflammable after 24h?

I was wondering if Isopropyl can still produce flames after being vaporised on wood and having a day to evaporate plus rinsed with hot water afterwards? If I put heat on the wood (around 50 degree ...