Questions tagged [toxicity]

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

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13
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2answers
3k views

Any substance too poisonous to measure an LD50?

A recent question on poisons was answered in part by bringing up the concept of $\pu{LD_{50}}$ and animal testing and so on; none of that was new to me, but it did bring to mind a question I don’t ...
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Hexanoic acid and copper/brass - toxicity?

We have a sensor made of brass through which we are flowing organic solvent vapours mixed with air, typically hexane and various alcohols. After a year or so the interior is covered in a greenish-...
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4answers
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How are poisons discovered? Does someone have to die/be poisoned from it first?

How are poisons discovered? Does someone have to die/be poisoned from it first? Or are there other ways of discovering the harmfulness of a substance? Perhaps everything is tested on other animals ...
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Could the inks used in Wonder Bread container have caused lead poisoning?

Decades ago I recall reading that the colorful wrapper of Wonder Bread was misprinted inside out and therefore the printed logo rubbed off on the bread itself, bread was used and kids ended up with ...
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1answer
762 views

Will squeezing lemon juice on top of foods with ferrocyanide additive release hydrogen cyanide gas?

For example, will squeezing lemon juice on top of table salt with sodium ferrocyanide ($\ce{Na4[Fe(CN)6]}$) additive (E 535) release hydrogen cyanide gas? Examples of ferrocyanide additives: sodium ...
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1answer
502 views

What is the Chemical Compound that has a NFPA 704 (Fire Diamond) of 2-2-1-ox?

I recently saw this fire diamond configuration of: 2 - Flammability; 2 - Health; 1 - Reactivity; OX - Extra Information I have been attempting to find a database of terms, but after turning up with ...
4
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1answer
82 views

How do the toxicities of arsenate and arsenite compare?

So I was browsing the detoxification metabolistic mechanisms for E. coli, and came across an arsenic detoxification mechanism that converted arsenate to arsenite using a glutaredoxin. So my question ...
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1answer
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Dangers of corroded mercury battery

Disclaimer: Sorry if this is not a pure chemistry question. If it's better suited to another SE, I'm happy to have it migrated there. I'm in the process of cleaning my father's workshop, and recently ...
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1answer
83 views

Can I get ride of dichlorobenzene in honey?

I have some honey that was stored near dichlorobenzene crystals & has taken on the smell. I'm wondering if I turn it into mead if it would remove the chemical? The procedure would be to add 5-10 ...
2
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1answer
73 views

Do chemical garden coral formations leach toxins?

Short version, I want to make a coral garden with sodium silicate and salts, and I would like to put that in my fish tank, but I'm concerned about the fish getting poisoned. https://en.wikipedia.org/...
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129 views

Why is dimethylmercury more toxic (to animal life) than methylmercury or ethylmercury?

It's obviously a two step process to reduce dimethylmercury to the less harmful inorganic form. Is neuronal uptake also enhanced due to lipophilicity? Is there some other mechanism of toxicity I'm ...
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1answer
37 views

How can we get the toxicity level of a plant without using animals? [closed]

We need to know the answer for our research paper. We will appreciate it so much if you will answer our question.
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Is bamboo based plastic less likely to leak chemicals?

Some plastics have been known to leak plasticizers (bisphenol and phthalates) into the food they contain, especially when heated. Because such compounds are suspected of being endocrine disruptors it ...
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1answer
325 views

I (might) have accidentally combined these mold-killers at home: Any adverse reactions?

A trailer is a small enclosed space. About 2 months ago we had some mold and I applied some mold killer to a few spots that I could not remediate. Below I've listed 2 products I used. (I definitely ...
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1answer
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Taste same but why not LiCl a substitute for NaCl (common salt)?

A clinical paper from 1949 [1] observes the toxicity of LiCl, at very low concentrations. That just went over my head... Is toxicity the only reason to avoid LiCl as a substitute for NaCl (specially ...
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Toxicity of vanadium in pottery

I mix and develop glaze recipes for midfire stoneware (fired to 1220°C). The colorants in pottery are mostly iron, copper, cobalt, tin, titanium, chrome, and a few other transition metals. Many of ...
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1answer
71 views

What are the organisms that are used for toxicology studies in water? [closed]

I have heard that zebra fish is used for toxicology studies . Is there any other organism that is actively used for toxicological studies?https://www.google.co.in/search?q=zebrafish+toxicity+studies&...
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1answer
71 views

Are there any poisons with an activation threshold?

Are there any poisons that lay dormant unless a significant quantity of one has been added, i.e. poison X might as well be water in concentrations less than 5M, but at 6M, all of a sudden a threshold ...
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0answers
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Is turpentine (as a solvent in plant-based paints) toxic after application? How long?

Turpentine is often used as a solvent in plant-based paints. It is believed that turpentine is equally if not more toxic than white spirit (see Green Building Handbook. Volume 1 by Tom Woolley,Sam ...
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2answers
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Can ethyl alcohol fumes be suppressed by a household air purifier/filter?

Can ethyl alcohol fumes be suppressed by a household air purifier/filter? In general, how are the fumes suppressed? How is it done? Can somebody direct me to some information regarding this? I've ...
3
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1answer
65 views

Aluminium, heat and biological safety

I'm currently working on a really simple project, an ashtray that can stop cigarette combustion. I planned to put an aluminium block into my ashtray, with some kind of curves or holes in it, in order ...
9
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1answer
542 views

Why does ethanol have a health rating of [2] in NFPA 704 whereas methanol, which is far more toxic, has a rating of only [1]?

Why Ethanol has the blue health hazard rating of 2 in NFPA 704 where as both Acetone and Methanol which are far more toxic than Ethanol have a rating of only 1? (Click on each link to see the NFPA ...
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1answer
101 views

What are the uses of ethyl phthalate

The last time I went to my junior college I remember seeing huge blue colored drums labeled ethyl phthalate. So just out of curiosity I decided to check upon this compound. Wikipedia entry containes ...
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1answer
327 views

Dangers of Colbalt Chloride Paper Burning

I am a science technician and foolishly decided to heat a small amount of cobalt chloride paper on a glass petri dish over a Bunsen. Unfortunately the petri dish broke and the paper hit the metal ...
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1answer
34 views

Is recycling introducing toxins into products that come in contact with food? [closed]

Paper products like napkins and paper plates made from recycled material might have unsafe levels of toxins if the original recycled materials contain toxic inks, etc. How big of a health concern is ...
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0answers
101 views

Colour change on exposure to singlet oxygen?

Is there a dye that is particularly well suited to radical colour change on interaction with singlet oxygen, preferably non-toxic? Based on this answer: https://chemistry.stackexchange.com/a/27633/...
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4answers
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Why n-Butanol is not used as a safer alternative to ethanol in the alcoholic beverages?

The $LD_{50}$ of n-Butanol adjusted for its intoxicating potency is about 1.5 times that of ethanol. This would mean to me that n-Butanol is therefore 50% safer than ethanol. Why is it not used to ...
14
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2answers
4k views

Can drinking a lot of water be fatal?

I vaguely recall having heard that drinking too much water can, over time, prove fatal to the human body. Nothing special about the water; not distilled or de-ionized or anything … just plain ol' ...
0
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1answer
353 views

Bolt head corrosion in soup. Toxic? Zinc? Cadmium? [closed]

This may not be quite the right forum for this question, but please help me if you can. I recently repaired the lid of my grandma's crockpot using a bolt I found in a miscellaneous fastener box in ...
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1answer
71 views

“Alcohol intoxication” naming confusion [closed]

From Wikipedia: "Alcohol intoxication is the result of alcohol entering the bloodstream faster than it can be metabolized by the liver, which breaks down the ethanol into non-intoxicating byproducts." ...
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2answers
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Is palladium really that poisonous?

In Iron man 2, the protagonist Tony Stark was anxious about his blood toxicity due to palladium core that was keeping him alive was slowly poisoning his blood. It is written here that: The ...
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1answer
1k views

Phenolphthalein indicator spill onto skin [closed]

I was using a phenolphthalein indicator to test the acidity of some 0.1 M HCl. I was using the pipette to draw the phenolphthalein indicator out of the tiny jar but it wasn't working, so I thought ...
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1answer
457 views

How does selenium protect against mercury poisoning?

I have read that it is not essential to avoid fish with mercury in them if they also have a correspondingly high level of selenium because mercury poisoning is primarily primarily the result of ...
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1answer
208 views

Is Jet Fuel/Kerosene still toxic after drying out?

A friend of mine is currently living in India. The people she is living with just treated the wooden door with either kerosene or jet fuel (its not clear which of the both, as the language barrier ...
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5answers
997 views

What elements (in the pure form) would harm a human, if eaten? [closed]

What pure elements, if we eat it in a relatively small dose (around a piece of sugar), can be harmful/lethal for an average human? Is, for example, eating pure carbon bad for the organism?
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2answers
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Toxicity of metallic lead (Pb)

I have some pieces of lead ($\ce{Pb}$) at home. I keep them in a box in the closet and never touch them. Can it be harmful? Should I throw them away? I would like to keep them, but I am not ...
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1answer
3k views

Is the Hollywood portrayal of the effects of ingesting HCN correct?

In the 2012 movie Skyfall, the antagonist Raoul Silva rues that the "hydrogen cyanide" he took ("Do you know what it does to you, hydrogen cyanide?") didn't kill him, leaving him horribly disfigured ...
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0answers
130 views

Which one is the healthiest to operate a lantern with: kerosene, diesel or sunflower oil?

Given a lantern (originally made for kerosene) however, I'm looking for the fuel which is the safest for indoor use. I've already tried different kinds, and found three of them that burn just as ...
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1answer
4k views

Why is the calomel electrode widely preferred despite its toxicity?

The following pagargraph is from the Wikipedia page of calomel: Mercurous chloride is employed extensively in electrochemistry, taking advantage of the ease of its oxidation and reduction ...
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3answers
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Mercury metal: Not toxic?

Now I (and most of us here, I guess) have grown up around "Mercury's toxic! Avoid handling it! Do NOT screw around with this thing, if you value your life" and other equally heartening pieces of ...
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1answer
49 views

How can I remove a PEG shampoo from a natural horn-comb without damaging it?

I washed by accident a horn-comb with a shampoo that contains PEGs, now how can I remove these types of chemicals from the horn-comb without damaging its surface?
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1answer
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What makes formaldehyde 'safe' or 'dangerous'?

I know that formaldehyde naturally occurs as a metabolite and can be found in our own and other animals' bodies, plants, and unprocessed food. But formaldehyde is also registered as a carcinogenic ...
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1answer
60 views

Carbon monoxide formation in broken boilers

It's common knowledge, that if you're boiler is broken, it might produce carbon monoxide ($\ce{CO}$) as a byproduct, which is very toxic, even in small quantities. My question is, why do broken ...
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1answer
3k views

Will a Dole Pineapple juice can made out of tin leach the tin into the juice & cause harm? [closed]

I drink a lot of Dole Pineapple juice from the can, because it has no added sugar or ingredients. Can it be harmful because of the tin in the can? I called Dole and the can is not lined.
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1answer
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Receiving milk for working in harmful environment

I just got a job in a chemical/biological lab (post-Soviet Country). Chemists here receive milk for "harmfulness of the work" (i .e. their work involves working with all kind of substances/reactives). ...
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1answer
211 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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2answers
132 views

Are certain substances in furniture truly toxic?

I'm looking to purchase a sofa, but have been bombarded with all kinds of internet info about the toxicity of certain materials used to make sofas. For example, polyurathane foam is labeled as toxic--...
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4answers
27k views

Are modern newspaper inks a health risk?

It's very common in India to see newspapers being used to absorb oils from oily snacks, or simply for temporary food packaging. Some articles say that covering food items in newspaper is a health risk....
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3answers
21k views

Is poison still poisonous after its 'expiration date'?

As we all know that, Any poison is nothing but a chemical compound. And as discussed in the question: Chemicals-do-have-an-expiry-date! So, my question is: Is poison still poisonous after its '...
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2answers
595 views

Is this home-made pesticide from cigarette butts and battery acid safe?

An old friend once told me that a good way to kill bugs in my garden was to soak lots of cigarette butts in water to make a gallon of the brown liquid. Then add one ounce of battery acid and mix well. ...