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

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Are these aftershave ingredients harmful for human skin? [on hold]

Ingredients of NIVEA aftershave: Water, Glycerin, Cyclopentasiloxane, Panthenol, Distarch Phosphate, Isopropyl Palmitate, Cyclohexasiloxane, Triceteareth-4 Phosphate, Tocopheryl Acetate (Vitamin E), ...
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21 views

Mixing Oxalic acid and glycerin

I am doing an experiment for a miticide for honey bees I will be dissolving 600g of 99.6% Oxalic Acid in one liter vegetable Glycerin @ 150F. I have been told it will give off formic acid fumes ...
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1answer
23 views

Sodium fluoride and varying pH - HF risk

I'm looking into conducting an experiment on the adsorption of fluoride (for my International Baccalaureate Extended Essay). As I will be investigating the role of $\mathrm{pH}$ in adsorption ...
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29 views

Why potassium bromate and potassium iodate is still used as an additive in bread making despite its toxicity?

On 23 May 2016, FSSAI( Food Safety and Standards Authority of India) considered banning the use of potassium bromate and potassium iodate additive in bread making. Following are some links that ...
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1answer
39 views

Is there powdered blood in TANG-pineapple powdered juice mix? [closed]

My TANG pineapple juice drink mix is a yellow powder. When I add a little water to it, it dissolves and red dots are briefly observed before mixing with the yellow dots is complete, after which time ...
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1answer
44 views

Determining actual safety from a vague material safety data sheet

My desktop computer system employs a liquid cooling loop featuring a 6-litre external reservoir and radiator combination "cooling tower" unit. It isn't a cooling tower in the strict sense as it does ...
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1answer
32 views

Control the pressure of Hydrogen in a small container without the use of a pressure regulator

I had recently asked this question, and due to the comments and general consensus of safety concerns, I decided to re-ask the question, attacking the problem from another angle. The Problem I need ...
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0answers
35 views

ZnO spontaneous combustion during transport

I found your contact information researching 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 produces ...
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2answers
33 views

How does LC50 translate to “real world” exposure for paint thinner?

Last year I started oil painting, which means (in part) that I use paint thinner for working with and/or cleaning brushes. I recently became concerned about my exposure to the vapor from the paint ...
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1answer
33 views

Safely storing hydrogen

I have built a solar panel which is used to add electrodes to $\ce{H2O}$ and $\ce{NaCl}$, evolving $\ce{H2}$ and $\ce{O2}$. How can I safely store the hydrogen in the long-term?
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2answers
59 views

Spreading of Chemicals (chemistry lab) [closed]

Is it possible to spread a chemicals or the danger of a chemical if the chemical has dried up? For example if I in a lab have gotten a certain chemical on my lab paper but the chemical has dried up ...
4
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1answer
69 views

Is there any reason to fear personal exposure to rain with a pH of 3.1?

Where I live now there can be significantly acidic rain. The government posts measurements for many cities and there can be stretches for days or longer with reported pH of 3.2 or 3.1. I even saw 2.9 ...
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1answer
77 views

Supermarket HDPE plastic bags safety

Supermarket plastic bags are made of high density polyethylene, and I am interested in the decomposition products at high temperature: what type of compounds are released and how dangerous are they? I ...
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0answers
37 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 ...
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1answer
34 views

Toxic levels of baking soda

What is the amount of baking soda that would be considered toxic for skin? I ask because there is a lot of misinformation online about using baking soda as a "natural" underarm deodorant, and how it ...
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1answer
56 views

What liquid other than water that is safe to put on your skin will provide the most evaporative cooling?

Suppose that you are in some extremely hot and humid place where your sweat just doesn't evaporate well enough to cool you down. You can then consider putting a liquid other than water on your skin, ...
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15 views

Hydrogen peroxide “cleaner” - How long will it increase inflammability in moist fabric

I treated a moist carpet in a car with an anti fungal liquid containing 1/5 hydrogen peroxide, the back of the bottle warns of flammability-enhancement. I'd like to dry the carpet (in the car, as ...
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2answers
104 views

Liquid-liquid caffeine extraction

I am performing a lab experiment in which I am extracting crude caffeine from different samples of tea. I have read a couple of similar experiments in which methylene chloride has been used to extract ...
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2answers
92 views

An explosion in a custard factory

I have a vague memory of a question on the BBC panel game QI which started with a long chemical reaction equation on the screen, asking what it might be. The answer was definitely "an explosion in a ...
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0answers
46 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: $\ce{Fe}$, $\ce{Cu}$, ...
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5answers
10k views

How do people know HCN smells like almonds?

I was told by my chemistry teacher that $\ce{HCN}$ smells like almonds. She then went on to tell a story about how some of her students tried to play a prank on her by pouring almond extract down the ...
3
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1answer
78 views

Mixing bleach and ammonia?

I know that the two should not be mixed, but i want to know that if the two become mixed in a contained unit, does it build pressure? Or can you seal the container safely untill it can be disposed of ...
3
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1answer
68 views

What happens in the NH4Cr2O7 with HgSCN reaction?

Apparently this video is a reaction of $\ce{NH4Cr2O7}$ with $\ce{HgSCN}$. The title of the video suggests the reaction opens a portal to hell, but I am pretty sure that is not the case. What ...
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1answer
28 views

Oxidizers Cabinet

I am currently reorganizing the chemical inventory in our lab and grouped all the oxidizers together. Would it be safe to put the following chemicals together in the fume hood cabinet? I have checked ...
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1answer
48 views

Where to store Sodium Azide?

I have about 100g of Sodium azide and would like to store it properly. Any suggestions as to where? I though of storing it in a locked vault but there are chemicals such as Arsenic sulfide, aniline, ...
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2answers
438 views

Testing for ammonia by smelling it?

My chemistry teacher taught us that one of the ways to see if we had produced ammonia gas in a reaction was if it released a pungent smell (Even BBC supported that here! ...
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1answer
43 views

Is 98%+ purity Reagent Grade Ca-EDTA powder as safe to use as USP Grade in the body? [closed]

Is $98\%+$ purity reagent grade $\ce{Ca}$-EDTA powder as safe to use as USP grade in the body? Or, does the reagent grade have unsafe impurities that USP grade would not have even though they are the ...
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2answers
87 views

Can dry ice explode?

Can dry ice be used as a explosive chemical? I am intrigued by this chemical dry ice and seen various experiments with it, and seems to have potential to be a explosive. So can dry ice explode?
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1answer
44 views

Is exposure to amyloid beta proteins dangerous?

Recently, I began working in a lab in which our main area of study is Aβ peptides. My concern is whether or not exposure to high levels of Aβ proteins is hazardous. I suspect that the peptides cannot ...
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1answer
43 views

Hydroxide storage

I am figuring out what chemicals to store with Ammonium hydroxide. At the moment a 2-shelf corrosive resistant fume hood cabinet will be used. I have in mind storing the Ammonium hydroxide with ...
3
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1answer
29 views

Are there IP limitations on (M)SDS documents?

Much effort is put in putting together (M)SDS documents: Many companies offer the service of collecting, or writing and revising, data sheets to ensure they are up to date and available for ...
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1answer
72 views

Need help identifying product of mixture of citric acid, NaCl, Cu, Al, H2O2, and unknown photoresist

When etching circuit boards, a somewhat commonly used substitute for (expensive and messy) ferric chloride is a mixture of an acid, a source of chloride ions, and hydrogen peroxide. If I understand ...
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0answers
49 views

What's the composition of gun smoke and is it dangerous?

Background I've been conducting an informal (i.e. mental) risk assessment of visiting gun ranges. There are a couple of obvious sources of hazard: Injury by bullet Hearing loss Hot casings flying ...
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1answer
88 views

What are the specific dangers associated with Grignard reagents?

I would like to know if anyone has had any specific safety-related problems with Grignard reagents. I have taught the year-long introductory Organic Chemistry sequence for about 15 years and have ...
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2answers
106 views

Method to synthesize KAu(CN)2 (or KCN)?

Every reasonably effective method of electroplating $\ce{Au}$ onto another metal's surface (e.g. $\ce{Cu}$,$\ce{Ni}$,$\ce{Ag}$, etc.) involves use of $\ce{KAu(CN)2}$ or in some cases $\ce{KAu(CN)4}$ ...
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0answers
34 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, ...
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2answers
58 views

Can I use lye as a cooking leavener instead of baking soda?

I asked this question on the cooking site, but got unsatisfactory answers: http://cooking.stackexchange.com/questions/65520/can-i-use-lye-as-a-leavener-instead-of-baking-soda I'm interested to try to ...
4
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3answers
84 views

Controled burn colored fire and safety

I am a martial artist who uses fire weapons in my shows. I am wondering how I can get the flames to be different colors. I've done some research about it, and have found that the salts of some ...
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1answer
40 views

Is Tollen's test safe?

Tollen's test is an important test to distinguish between aldehyde and ketone. $$\ce{2 [Ag(NH3)2]+ + RCHO + H2O → 2 Ag(s) + 4 NH3 + RCO2H + 2 H+}$$ But is this reaction safe? Is there any threat in ...
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26 views

To what degree an N99 active coal filter can protect against products of burning paraffin oil?

I sometimes do firedance and a part of it is waving a stick with burning endings made of kevlar soaked in paraffin oil. I started to be a bit concerned about how healthy is it to inhale lot of ...
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1answer
47 views

Can you tell me which one of these substances are highly or easily flammable? [closed]

List is next: ethylene glycol (EG), diethylene glycol (DEG), triethy-lenglycol (TEG) basicly liquids from polyol groups, I know alcohols are flammable but what about polyols? and how easily
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1answer
79 views

Do polycarbonate and/or polyurethane have latex?

I have a severe latex allergy which hinders my health every day via hives, inflammation, and breathing trouble. I am trying to find a cell phone that is not going to cause anaphylaxis or other ...
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0answers
90 views

Is mixing ammonia and bleach spray in the same parcel of air considerably dangerous to health?

I've read a few articles advising not to mix bleach and ammonia in the same room because it makes chloramine gas. But my boyfriend and I are having an argument - he thinks that since those articles ...
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1answer
126 views

Is there an easy way to make PVC from PVA?

Say, I took Elmer's glue (or a similar Polyvinyl Acetate) and I inserted some Chlorine Tabs and warm it up while stirring. Would the electronegative Chlorine turn some of it it into Polyvinyl ...
3
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1answer
454 views

Why do we have to wear Lab coat when we go inside chemistry lab?

Well at first it seems kind of awkward but let me tell you what I was thinking from past few days. Currently I am studying and go to school. In school, whenever we have to go inside a chemistry lab ...
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41 views

Can we modify plastic to cool things?

I have very little chemistry background and I have a project that I'm working on about smart plastics. My question is: Can you chemically modify plastics so that you can make it into a regular ...
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0answers
63 views

Is PVC membrane roofing safe from a health perspective?

I'm interested only in the use aspect(for example, living on the last floor where PVC roof is used), not the production or utilization aspects. There are two opposite opinions about this question. ...
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1answer
42 views

Obtaining magnesium oxide from magnesium hydroxide

What's the simplest and safest DIY way to obtain magnesium hydroxide to magnesium oxide?
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82 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 ...
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3answers
381 views

Cleaning up a sulfuric acid mess

This morning a workman came by to my newly rented property to fix a few things, among which a slightly blocked bathtub drain. He let some mild water run continuously and he poured down a chemical, ...