Questions tagged [safety]

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

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Can Bromophenol Blue Sodium Salt, and Pentane be safely mixed/in contact with each other?

I'm trying to determine if powdered Bromophenol blue is safe to mix with Pentane. I would only need a tiny amount of dye, just enough to tint the pentane. I need to use pentane for it's specific ...
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-1 votes
1 answer
59 views

Where in the apartment to store isopropyl alcohol

I want to have some 99% isopropyl alcohol for cleaning purposes and I'm wondering where to store it since in my apartment I don't have a storage room or much space. I've read it needs to be air tight ...
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-1 votes
1 answer
89 views

Is boiling aqueous solution of copper(II) sulfate safe?

I want to create saturated coper(II) sulfate solution in order to grow crystals. Is boiling a solution of copper sulfate at home safe? Are there any risks? Is the vapour pure water?
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-3 votes
1 answer
38 views

Possible Plumbing Acid through Leaky Pipe in Floating Ceiling, How to Test/Clean?

So I had a plumber in the other day, and I don't know if he used acid drain cleaner or not. The pipe where the possible leak is, is over some drop ceiling (vinyl or expanded polystyrene). Before I go ...
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-1 votes
2 answers
51 views

Are intermediate bulk container units suitable for storage of isopropyl alcohol? [closed]

I'm working in water treatment construction and my boss is going to be stocking isopropyl alcohol (IPA). He wants to store the chemical in bulk, with amounts ranging from 5000 L to 10000 L in IBC ...
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1 vote
4 answers
115 views

Why are strong oxidizing agents "incompatible" with ferrocyanide according to SDS?

As I've mentioned in this question, I am making $\ce{Na3Fe(CN)6}$ from $\ce{Na4Fe(CN)6}$ by oxidizing the ferrocyanide using sodium permanganate. The SDS of sodium ferrocyanide as well as potassium ...
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2 votes
0 answers
38 views

How to safely transfer P2O5 waste from a round bottom flask to waste bottle?

The $\ce{P2O5}$ is used as a neat desiccant in the round bottom flask as part of a vacuum system and is mainly solid with some liquification after use. Waiting for it all to liquify isn't practical, ...
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0 votes
1 answer
55 views

Hydrogen safety during electro-chemical machining

I'm interested in doing some experiments with electro-chemical machining in my shop. The process involves running electricity through an electrolyte (salt water) to break down a metal anode (aluminum/...
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1 vote
1 answer
75 views

Suppressing flammable foam formation in electrolysis

I often use electrolysis to remove rust and other junk off of steel parts. My general setup is: Electrolyte: Sodium bicarbonate + distilled water. Anode: Plain carbon steel Cathode: Carbon steel, ...
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-4 votes
1 answer
61 views

Spilled denat. alcohol (5% methanol) [closed]

I spilled a small amount of denatured alcohol (~3ml) on my skin and table while prepping microscope slides for springtails. The bottle says its 95% ethanol, with unspecified amounts of isopropanol and ...
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2 votes
1 answer
87 views

How does this coin-and-strike-paper trick work (and is it safe)?

When I was a kid I remember a thing an adult showed me where you would take a piece of strike paper from a matchbox, rest it on a "copper" coin (I have no idea what these coins are made of), ...
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Pcb etching safety questions (HCl, H2O2, H3PO4)

I am about to embark on a pcb etching journey, however, I am not sure what safety precautions I should take when handling the products. I know that the reagents should be stored in their original, ...
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-4 votes
1 answer
174 views

Can 5% sulfuric acid and 3% hydrogen peroxide form piranha solution?

I'd like to use 5% sulfuric acid and 3% hydrogen peroxide as an etching solution for copper. (In the past I've used dilute hydrochloric acid and hydrogen peroxide but the generation of chlorine gas ...
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0 votes
0 answers
38 views

acetic acid 50% safety and storage

I need <5% acetic acid in some solutions (for microscopy) and if I am not wrong I need around 15-20% solution to be able to make these (other components like alcohols or glycerol I can find and use ...
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0 votes
1 answer
55 views

What antimicrobial can be readily synthesized in a school laboratory for a project on antimicrobial resistance? [closed]

I am currently a student studying at a high school hoping to do a project on antimicrobial compound synthesis to use in investigating antimicrobial resistance in E. coli strains. I am hoping to ...
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0 answers
55 views

Natural preservatives of ink

Would pure compounds like thymol, carvacrol and cinnamaldehyde work as preservatives of fountain pen ink? I'm specifically interested in three properties - Prevention of growth (mostly fungal) in the ...
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1 vote
0 answers
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How do you make an SDS for a milligram sample synthesized for the first time?

There is this impurity detected by GCMS that we got custom synthesized at a 15 mg level. There's this absolutely tiny vial that needs to be couriered to the lab for further analysis. Fedex insists on ...
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4 votes
1 answer
303 views

Why should hydrogen peroxide be added to sulfuric acid and not vice versa?

When preparing aqueous solutions of sulfuric acid through dilution of the pure acid, it is well known that we should add acid to water and never the reverse. To prepare a solution of hydrogen peroxide ...
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2 votes
0 answers
73 views

I have tried to remove oxidation from a metal scraper using vinegar, now the metal looks and smells burnt, what went wrong?

I have recently tried to remove some oxidation from a metal scraper spatula by using vinegar. After leaving it there for a couple of hours I was left with a burnt smell (with a hint of burnt candle ...
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8 votes
1 answer
815 views

Is powdered acid dangerous? [closed]

I was told that an acid is only dangerous because it releases $\ce{H+}$ ions when in contact with water. Therefore, powdered acid should be completely safe on skin provided that your skin is not ...
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1 vote
1 answer
62 views

Will Sodium Polyacrylate (SAP) absorb the gas from liquid ammonia?

I'm considering using sodium polyacrylate grains to absorb spills of a relatively strong Ammonium Hydroxide solution. Will the SAP (super absorbent polymer) only absorb the water, and in effect make ...
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0 votes
0 answers
42 views

Where do MSDS data sheets get their information? (How to write one)

For example looking at Sigma-Aldrich MSDS sheets, where do they cite their studies that found hazard in the chemicals? Or in other words, how does one "write" an MSDS sheet? I need to write ...
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1 vote
0 answers
24 views

Cleaning solution alternatives for acetate, nitrate, or polyester base motion picture film

I am in search of alternative film cleaning solutions which are safe for the film, me, and the environment. I have used several different professional film cleaning solutions in my many years of ...
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5 votes
2 answers
172 views

Am I accidentaly creating dangerous silver nitride?

I am doing some experiments with alternative film chemistry and I am starting to get concerned about safety. One experiment involves converting a small amount of metallic silver to silver chloride and ...
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6 votes
1 answer
1k views

Is Thermoplastic Rubber Food/Pet Safe? Confusions between TPR and TPE

I'm not sure if this is the correct place to post this or if I should be posting at Crafts or Engineering, but since my primary concern is about the safety of its use for my dogs I will post here. I ...
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4 votes
1 answer
87 views

Why are zinc shot and mossy zinc not considered toxic but zinc granules are?

In our lab we have three forms of zinc. We were initially experimenting with these three forms to optimize our application. We have "zinc shot", "mossy zinc", and "zinc ...
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-4 votes
1 answer
113 views

Practices while using a boiling tube

When using a boiling tube to boil a liquid, I am frequently advised to move the boiling tube in and out of the Bunsen flame and when the liquid starts to boil, remove the tube from the flame for a few ...
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3 votes
0 answers
37 views

Safety concerns (Cyanide): Dicyandiamide + Polyamine condensation reaction

I am attempting to synthesize a poly-amine polymer by condensation between dicyandiamide (also known as cyanoguanidine and dicyandiamine) and diethyltriamine. The polymer is a kind of dye fixative ...
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4 votes
1 answer
46 views

Toxicity of Mercury (II) Iodide and dicopper (I) tetraiodomercurate (II)

This is a continuation from my previous post. Could you please give me some info on the toxicity of compounds $\ce{HgI2}$ and $\ce{Cu2[HgI4]}$? I found on sigmaaldrich.com that these are very ...
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4 votes
0 answers
71 views

How to use Sodium Thiosulfate for fixing dicopper (I) tetraiodomercurate (II)?

DISCLAIMER DO NOT TRY TO DEMERCURATE USING DESCRIBED PROCEDURE. CONSULT YOUR EMERGENCY SERVICE. I found a discrepancy between a government-approved procedure of living quarters demercuration and the ...
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1 vote
1 answer
65 views

Should I be worried about the waste from "sugar rockets" and other potassium nitrate fireworks?

"Sugar rockets" or sparklers made of metal fillings, potassium nitrate and some carbon compound are easily made, and there is a lot of tutorials and videos on the internet suggesting them as ...
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3 votes
0 answers
63 views

The safest and easiest way of working with solid LDA

I have a 25-gram bottle of solid LDA (lithium diisopropylamide), factory sealed. I'm going to setup an aldol reaction with it, but I don't know how to organize work properly. I think of quickly ...
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1 vote
0 answers
50 views

Solvent + Photopolymer Waste Disposal

I have a 3L jug of SLA printer-related waste that's been sitting under my desk for a while now and I'd really like to finally figure out how to get rid of it. It contains: Ethanol (primarily) and ...
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2 votes
0 answers
21 views

Chemical safety information: Where to look to find out how poisonous poisons are?

Could someone point me toward a primer on how to read the toxicity warnings on standard chemical data sheets? Or alternatively, where one should look for more precise information than is contained on ...
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3 votes
1 answer
193 views

White growth on unopened bottle of chlorotrimethylsilane

I have a white, moldy-like substance that has been growing near the cap of an unopened glass container filled with TMSCl. It has spread to form a thin, powdery coating on all of the other containers ...
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-3 votes
1 answer
115 views

HCN, or my nose says I'm dead [closed]

As you see, I still post... I studied chemisty decades ago (and when I was through with all the compulsory practica, I was sent to a computer chemistry workgroup and politely suggested to never touch ...
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1 vote
0 answers
33 views

How can a detergent "designed for sensitive skin" warrant the "corrosive" hazard symbol?

The dish-washing detergent, which you can find an image of here, has the following hazard symbol on its back: On the back, it additionally says that if it comes in contact with the skin, you should ...
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1 vote
0 answers
24 views

How do I understand exactly how hazardous a material is based on SDS?

I work with a lab occasionally and get asked often if a chemical is safe to breathe, how hazardous is it if it lands on skin, etc. For the most part, I'll try to go to an SDS and look it up. The ...
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0 votes
1 answer
112 views

Phosphoric acid spill cleanup

While working with some rust converter (MSDS, ~20% phosphoric acid by weight), a sequence of events that would make Rube Goldberg proud led to me spilling about 500mL of it all over the place. Yes I ...
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1 vote
0 answers
31 views

Standard practice for keeping salts dry

I should point out first that I'm not a chemist, but I'm currently doing a little bit of chemistry; this should clarify that I don't have formal training in a chemistry lab (other than some basic chem ...
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3 votes
1 answer
253 views

Are there safe inks that allow one to eat a fish after painting it?

Just came across a specific type of art called Gyotaku where specific types of ink are used to paint over one side of a fish and then a paper (rice paper, shoji paper, ...) is placed on top in order ...
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0 votes
0 answers
29 views

When multiple sources give the content of an ingredient my an unqualified percentage, can I safely assume this is by weight? Or; it's not a wart

I am trying to make a simple scented shampoo and body soap for my own use and for Christmas gifts. I statr with a base of 32 oz – (a bit under a kg) of a mild commercial castille soap (Dr. Bronner’s ...
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-1 votes
2 answers
1k views

Is there a safe way to neutralize bleach at home [closed]

I don't want to simply replace one hazardous chemical with another. The bleach is stubbornly clinging to my shower walls and I feel its effects every time I take a shower. Ascorbic acid seems like the ...
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-2 votes
1 answer
236 views

What are the consequences of mixing Ferric Chloride Solution, distilled vinegar, baking soda and water? [closed]

I was attempting to etch and blade with a ferric chloride solution. I did not have enough so I filled a glass with vinegar and water (3 parts vinegar to 1 part water) then added 2 oz. of ferric ...
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0 votes
1 answer
7k views

Guidelines for home generation of hypochlorous acid disinfectant from salt water [closed]

I bought a home generator for making hypochlorous acid by electrolysis of a water and salt solution. I would like to figure out guidelines for safe and effective use of my generator. I have found ...
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8 votes
4 answers
2k views

Is it safe to look at a mercury gas discharge tube? [closed]

As part of a chemistry course, I recently observed a demonstration in which the instructor electrified a mercury gas discharge tube (the tube looked something like this image). The glow from the tube ...
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2 votes
0 answers
30 views

General Question about transferring Solution from containers (Workplace Related)

At my workplace we will soon begin diluting a solution to specific concentrations, this is done within a specific container. The solution to be diluted is provided by a manufacturer in the following ...
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0 votes
2 answers
341 views

Is it safe to combine sodium hypochlorite (bleach) sodium triphosphate (TSP) for cleaning?

I've heard this combination can be particularly effective at cleaning biofilms, perhaps because the TSP is a surfacant, allowing bleach to "attack" more layers of the biofilm. However, I'm ...
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1 vote
2 answers
816 views

Are burns from Lye or Potash that bad?

I read that the chemicals potassium hydroxide and sodium hydroxide are extremely corrosive and will cause severe burns but I also see videos of people saying that if you get lye on you, then just wash ...
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2 votes
0 answers
47 views

Does davis safety lamp detect explosive gases in ship compartments? [closed]

I feel managers at Bangladesh ship breaking yard are not properly caring for safety of workers. Many workers die in explosions while salvaging metal. documentary available on YouTube by National ...
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