Questions tagged [safety]

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

Filter by
Sorted by
Tagged with
2 votes
0 answers
44 views

What is the flash point of acetylene?

On episode s10e11 of the show Criminal Minds, a confrontation occurs in a freezer full of acetylene gas. In this confrontation, the main character confidently fires her gun because the freezer was &...
-2 votes
0 answers
31 views

Mercury thermometer broken [closed]

So I broke my thermometer and I try to clean it really fast and get it done and double check it but now I just see 2 mercury beads in crack of my floor and I just see those leftovers beads after 2 day ...
2 votes
1 answer
58 views

How to store ammonium perchlorate?

How should ammonium perchlorate (AP) be stored safely? The AP at PEPCON was stored in plastic and aluminium containers. I seem to remember that the very material of the storage containers (i.e. ...
3 votes
1 answer
356 views

Is it possible to store a Tween 80 stock solution?

I am making a stock solution of Tween 80 (0.05 % w/v) and each experiment requires just 15 ml of the stock solution. Is it possible to make a large batch (about 100 ml) and store it somewhere? If so, ...
1 vote
0 answers
52 views

Will my method for catching lead dust work?

I am a hobbyist and a crafter working with cast models. These modles are up to 80% lead, with the rest being tin or similar soft metals. They are made in a mould, so they often have mould lines that ...
-1 votes
1 answer
62 views

How is Magnesium Ethoxide appropriately prepared, stored and used to dry ethanol?

I found many procedures vaguely describing the preparation of magnesium ethoxide from elemental magnesium in excess dry ethanol in the presence of I2 as activator (in absence of air), I also know that ...
  • 1,015
-4 votes
1 answer
50 views

Can glycerin crack a glass when heated? [closed]

Is it safe to put glycerin in double wall glass candle ( between the walls ) for decor purposes. I know they put it in vapes and double glass wall coffee tumblers. Is there a possibility of it to ...
0 votes
0 answers
62 views

Would a 0.3 micron filter be effective in blocking formaldehyde fumes produced by curing cyanoacrylate?

I’m looking into purchasing a mask that blocks particles larger than or equal to 0.3 μm in size. I’m hoping it blocks the formaldehyde fumes produced by curing cyanoacrylate. How effective such mask ...
-2 votes
1 answer
53 views

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 ...
  • 3
-1 votes
1 answer
115 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 ...
  • 9
-1 votes
1 answer
129 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?
-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 ...
-1 votes
2 answers
61 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 ...
1 vote
4 answers
126 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 ...
  • 59
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, ...
0 votes
1 answer
62 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/...
  • 109
1 vote
1 answer
87 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, ...
  • 1,102
-4 votes
1 answer
65 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 ...
2 votes
1 answer
90 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), ...
  • 137
0 votes
0 answers
64 views

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, ...
-4 votes
1 answer
347 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 ...
0 votes
0 answers
53 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 ...
  • 103
0 votes
1 answer
56 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 ...
1 vote
0 answers
126 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 ...
  • 11
1 vote
0 answers
22 views

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 ...
  • 1,508
4 votes
1 answer
492 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 ...
  • 1,161
2 votes
0 answers
76 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 ...
  • 31
8 votes
1 answer
846 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 ...
  • 83
1 vote
1 answer
82 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 ...
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 ...
  • 101
1 vote
0 answers
27 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 ...
  • 111
5 votes
2 answers
203 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 ...
6 votes
1 answer
2k 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 ...
  • 39
4 votes
1 answer
106 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 ...
-4 votes
1 answer
138 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 ...
  • 176
3 votes
0 answers
42 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 ...
4 votes
1 answer
52 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 ...
4 votes
0 answers
82 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 ...
1 vote
1 answer
88 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 ...
3 votes
0 answers
73 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 ...
1 vote
0 answers
57 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 ...
  • 1,102
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 ...
  • 167
3 votes
1 answer
197 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 ...
-3 votes
1 answer
119 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 ...
1 vote
0 answers
37 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 ...
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 ...
0 votes
1 answer
158 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 ...
  • 1,102
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 ...
  • 89
3 votes
1 answer
306 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 ...
0 votes
0 answers
30 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 ...
  • 167

1
2 3 4 5
10