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Questions tagged [toxicity]

Questions on the harmful effects of various substances on the human body, or biological organisms in general.

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9
votes
1answer
149 views

What's wrong with using tin in medicinal chemistry?

I just read this In the Pipeline post and I was slightly confused by a statement on the use of tin. Lowe reports on this paper, which describes a synthetic route to spiro heterocycles using tin ...
8
votes
1answer
417 views

Is Sweetwater, Missouri, named due to water contamination with lead compounds?

The town of Sweetwater, Missouri is known for its mineral resources, particularly rich lead sulfide (galena) deposits. I am curious to find the origin of the name "Sweetwater" and if it has any ...
7
votes
1answer
463 views

Cyanide from seeds breaking down in a pond

I have a large loquat tree that overhangs a pond. The loquat seeds apparently contain cyanide of some sort, so I'm trying to find the effect the seeds have when they fall in the pond. Over time I ...
9
votes
2answers
558 views

Why is mercury much more toxic when inhaled than injected?

Following wikipedia: Cases of systemic toxicity from accidental swallowing are rare, and attempted suicide via intravenous injection does not appear to result in systemic toxicity,[1] though it is ...
1
vote
1answer
197 views

is there a lead compound that crosses the blood-brain barrier when ingested?

for example mercury oxide has neurotoxic properties but isn't organic so, it isn't soluble in lipids and so doesn't cross the blood brain barrier when ingested, however, methylmercury chloride is ...
4
votes
2answers
5k views

Why does my coffee creamer have titanium dioxide in it and is it safe?

From the manufacturers website of a coconut french vanilla coffee creamer: Ingredients: ORGANIC COCONUT MILK (WATER, ORGANIC COCONUT CREAM), DRIED CANE SYRUP, NATURAL FLAVORS, COLORED WITH TITANIUM ...
2
votes
1answer
923 views

How effective is sulfur in detecting mercury vapors

I've read that powdered elemental sulfur will react to the presence of mercury vapor in the air creating red mercury sulfide, and that an open container of sulfur can be used as a means to verify ...
1
vote
0answers
88 views

Is it dangerous to live near lead? [duplicate]

Several month ago, I soundproofed the door of my room with two sheets of lead. Can it be dangerous to live with them for many years? Can lead "decay" in some way and be inhaled? (and what happen when ...
2
votes
3answers
593 views

Harmless & pungent volatile liquid for use in a stage show

If for some stage play/trick we would like to create some surprising effect in which something with a pungent odor has been released, but at the same time need to ensure that thing be absolutely safe ...
3
votes
1answer
198 views

Does hydroxytyrosol have the same neurotoxicity potential as dopamine?

It has the catechol group, and it's the oxidation of the catechol group that makes dopamine produce reactive oxygen species (ROS). Hydroxytyrosol isn't that different from dopamine (the distal N ...
5
votes
5answers
1k views

What is the molecular mechanism of ammonia's toxicity?

How does it damage proteins/lipids/DNA? There seems to be surprisingly little literature on its toxicity.
20
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2answers
25k views

Toxicity of a sheet of lead?

I just went camping and someone brought a game from Australia. There was a wooden box with the top made of a thin, soft sheet of lead with a hole in it. The participants then throw coins at the box, ...
4
votes
1answer
656 views

Reduce chlorine gas

I have a simple electrolysis setup which uses aqueous sodium chloride as electrolyte. The problem is that, the setup makes tons of chlorine gas along with hydrogen (I only want hydrogen). I didn't ...
2
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0answers
63 views

What sort of lab can determine PAH concentration in a soil or charcoal sample? How difficult is it to do?

Non-chemist here. I'm curious how difficult it is to determine concentration of PAH in a sample of soil or powdered charcoal, or a sample of the two mixed together. What would be involved in doing ...
3
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0answers
912 views

How to test for presence of Tobacco/nicotine in a product?

I found this paper that says nicotine was found in major toothpaste brands in India. Rather than playing blame game, wouldn't it be easier to test ourselves ? How to test for presence of Tobacco/...
5
votes
1answer
573 views

Why do different alcohols have different effects on the brain?

I've been trying to understand why different alcohols have different effects on the brain. Methanol is obviously poisonous, apparently because it's converted to formic acid. Because the body seems ...
2
votes
1answer
118 views

Instructions for handling toxic liquids

I would like to know what precautions should be taken when handling liquids like trichloroethylene, tetrachloroethylene, dichlormethane, and mercury. Of these, which is most toxic? I have seen ...
3
votes
1answer
261 views

What makes mercury vapors so harmful?

I just read an experiment in which mercury has to be heated and in the same experiment there was a note warning not to inhale mercury vapors as they are very harmful. I just can't get the point that ...
12
votes
1answer
451 views

How long burned tobacco/cigarette smoke remain toxic?

It's hard to evaluate Environmental Tobacco Smoke lifecycle, it can certainly react, be absorbed by organisms, or be diluted in rain, and be emitted again from the ground. But in the end, I'm ...
4
votes
1answer
178 views

Chemical Spill in Charleston, West Virginia

I live in Charleston, WV. On 1/9/2014 we were told not to use our tap water for anything other than flushing the toilet after a storage facility leaked over 7,400 gallons of 4-methylcyclohexane ...
1
vote
2answers
554 views

Does my data show quadratic regression in a calibration curve?

This data was taken for my science fair project, and I would like to know the relationship between spectrophotometer absorbance and cell density (taken manually) of algae after a toxicity test. The ...
11
votes
2answers
20k views

At what amount is digesting soap unhealthy?

Several of my friends, when they do the dishes manually, do not rinse the dishes after cleaning but merely dip them in the dishwater and then dry them (using a towel or a dish rack). I myself on the ...
1
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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) ...
1
vote
1answer
378 views

How toxic is disilanol?

Silicon has been known to form analogues of organic compounds. For example, silicon with 4 hydrogen atoms forms silane as opposed to methane. This continues up the alkane list, with disilane for ...
1
vote
1answer
308 views

How can silver work as a disinfectant in a bathtub if precipitates in the presence of chloride?

I use a silver based disinfectant in my hot tub. It is in the form of silver nitrate beads. There is chlorine in the tub that I presume becomes chloride ion. Why doesn't the silver form a precipitate ...
3
votes
1answer
852 views

What is the best way to detect the presence of tear gas?

I realise that tear gas can be several different things (Pepper spray / CS Gas / CR gas, PAVA, etc) Is there a good way to detect some or any of these in the air? Ideally using an electronic sensor ...
3
votes
1answer
497 views

Peltier Bismuth-Telluride toxicity

From what I understand, the working agent inside a peltier cooler is Bismuth-Telluride. I've read a toxicity data-sheet regarding Bismuth-Telluride here. If I were to use a peltier cooler inside a ...
19
votes
1answer
9k views

Why are the halogens good disinfectants?

I've been searching around the internet for a while and I know that Chlorine, Bromine and Iodine are used as disinfectants. My question is, what is the property of the halogens that make them ...
5
votes
1answer
4k views

Chemically Speaking, What's Bad About Inhaling Plastics?

I hear about things like dioxin, but I really don't see what's dangerous about plastics-shouldn't you be ble to just breathe it out, or pass it out of your system? How would it cause cancer?
2
votes
1answer
96 views

Aflatoxin versus Benzene, permissible levels

Alfatoxin and benzene are carconogenic, and this is the major concern for low, chronic doses. They are regulated to the few parts per billion level in food. However, according to http://toxnet.nlm.nih....
46
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5answers
46k views

Is there any substance that's a 4-4-4 on the NFPA diamond?

A lot of the organometallics are rather... interesting compounds to work with. The most famous (among those who care, anyway) is tert-butyllithium or t-BuLi. It is the textbook example of a pyrophoric ...
2
votes
1answer
407 views

Impact of detergent on internal living tissue?

There was some spirited debate between the members of my chemistry lab today about the theoretical consequences of ingesting a large amount of the detergent Triton X-100 at a 100% concentration. The ...
2
votes
1answer
1k views

Can silica gel beads cause silicosis if crushed?

Can silica gel beads (which I believe are amorphous) when crushed to dust cause silicosis?
6
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5answers
15k views

Is tin and tinware toxic?

I tried to find info on tin toxicity but there is not much. Wikipedia here says that it is not very poisonous; but there could be cases. My question is: is it dangerous to say have a coffee boiled ...
7
votes
2answers
740 views

Cyanogenic glycosides and HCN

I'm researching cyanide for a biology project and noted that one of the largest sources of carbohydrates in the tropics is the cassava root -- which I previously researched as a food that contains a ...
16
votes
3answers
14k views

What is the effect on humans of using dry ice and liquid nitrogen as food additives?

I have seen on a TV show that some guy uses dry ice (solid $\ce{CO2}$) to make ice cream and on an another TV show, liquid nitrogen ($\ce{N2}$) is used with tequila. Both are edible. I know that ...
7
votes
1answer
22k views

Adulteration of turmeric with Metanil yellow

I read in the local paper that common food products like turmeric can be adulterated. It continued to specify the adulterant which they called metanil yellow. On searching on the Net, I was able to ...
11
votes
3answers
8k views

Calcium carbonate toxicity

I can't make heads or tails of the information on the net — although there seems to be plenty of it, it seems contradictory. Supposedly, calcium carbonate is used in antacids—yet there are warnings ...
-1
votes
1answer
4k views

Is the smell coming out from a portable dehumidifier safe? [closed]

A portable dehumidifier requires the consumer to plug it into an outlet to regenerate its crystal. When the crystal is thus "regenerated", the indicator will change from pink color to its original ...
8
votes
1answer
9k views

Is Blue Silica Gel more harmful than the Orange ones?

I am currently searching for a portable dehumidifier but notice that most of them come with a indicator that actually using the Blue Silica Gel, which I believe that it may contain Cobalt Chloride. ...
5
votes
1answer
493 views

Mercury, amalgams and mercury compounds [closed]

Mercury is toxic. It forms amalgams and inorganic mercury compounds/salts are available. My question is on toxicity. I am interested in its toxicity, not the mode of action (as it will be part of ...

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