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

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Can I remove sugar from soda using microfiltration (using gelatin)

Basically will the sugar molecules be left behind in the filtration process I'm looking into this method for naturally and safely flavoring vape juice (sugar would burn on the coils) if not do you ...
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0answers
9 views

5-fluoro uracil lab. working conditions

I want to work with 5-fluorouracil in my experiment.It is quite toxic and need careful protection. Anybody works with 5-fluorouracil would tell me in which conditions do you use it. Do you use glove ...
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2answers
108 views

Under which criteria HNO3 is a concentrated or a diluted acid? [on hold]

I would like to buy nitric acid to remove impurities of copper on an aluminum plate. I read that a 10% nitric acid will do the job. However I've also read that concentrated nitric acid is very ...
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1answer
48 views

Is it safe to use lab-grade calcium nitrate as a fertilizer?

I want to use lab-grade calcium nitrate in my hydroponic system (as a fertilizer) to grow lettuce, is it safe?
3
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1answer
33 views

Reaction between lye and water?

I am planning on making some homemade soap soon and have read online that breathing in the fume generated from the reaction between lye and water is not recommended because it is "hazardous." I am a ...
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1answer
85 views

Would consuming the Belousov-Zhabotinsky reaction be dangerous? [closed]

I'm wondering if the chemicals involved in the Belousov-Zhabotinsky reaction would be at all poisonous. If at all, do you know of another similar oscillating reaction that could safely be ingested? [...
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1answer
30 views

Homemade insecticide, is it safe or will a harmful chemical reaction occur? [closed]

I live just outside of Tucson Arizona and there are a lot of venomous spiders, scorpions and other potentially harmful critters. I have 2 retrievers, 2 cats and 4 turtles and would like to avoid ...
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0answers
34 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
31 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 capacity,...
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1answer
42 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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3answers
72 views

Does water evaporated from sea water contains any salts in it?

I want to know whether water evaporated from sea water is liable for drinking or not?
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1answer
55 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
40 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
41 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 ...
2
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2answers
37 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
35 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
72 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
80 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
39 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
38 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
62 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, e....
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0answers
16 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 it'...
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2answers
106 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
104 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 ...
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1answer
82 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
71 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 ...
4
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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
451 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! http://www.bbc.co.uk/schools/...
2
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1answer
45 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
90 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
45 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
30 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
73 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
55 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 ...
2
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1answer
99 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 ...
4
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2answers
115 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 $\ce{KAu(CN)4}$ ...
2
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0answers
35 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
61 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
90 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
44 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 ...
3
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0answers
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
4
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1answer
105 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
106 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
136 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 ...