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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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Toxic Fumes released by PVC & TPE

Simple question. I have not been able to find much data on the use of PVC or TPE in high temperature situations (100-200 degrees Fahrenheit). It seems that these plastics only release toxic fumes at ...
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3answers
621 views

Are risks (hexavalent chromium) during Chrome plating temporary, or remain with the product?

Since some chrome plating production processes generate hexavalent_chromium compounds, which are reportedly highly toxic/carcinogenic, I wonder: Do the hexavalent chromium substances only occur (...
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Metal colored flame and safety

For Chrismtas I was a given a wonderful gas lighter, that produced a pink flame by heating small metal pads (when the pads are cold, the flame is blue, once they are red hot, the flame is colored). ...
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1answer
33 views

Is the flint used in disposable lighters toxic?

Especially the sparks that result when using them. I heard this from a friend and can't seem to find an answer on Google.
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1answer
63 views

Is it safe to heat fluorite (CaF2) to 140 °C?

For the manufacture of the optical system, we need to heat the fluorite ($\ce{CaF2}$) lenses to $\pu{140 °C}$. Is it possible: for some poisonous gas to be emitted? ($\ce{F2, HF}$ or other) for ...
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What makes dimethylmercury ((CH3)2Hg) so penetrative through latex and human skin?

I've read the story of Karen Wetterhahn and how she was poisoned and died from two drops of dimethylmercury that accidentally fell on her latex glove, and I was wondering what is the chemical ...
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143 views

Why is carbon monoxide not a greenhouse gas?

Carbon monoxide is considered to be a toxic gas and, given that it is usually found along with $\ce{CO2}$, why it is not considered a greenhouse gas?
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118 views

Would standing next to a pool of mercury do you any harm?

I was watching this clip from the 2017 film The Mummy in which the characters stand next to a pool of mercury which was being used as part of an elaborate prison. Several comments under this video ...
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123 views

What is the composition of camel urine. Does it contain any particularly toxic substance? [closed]

I'd like to know the composition of camel urine. Furthermore, I'd like to know if it contains any known toxins.
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1answer
44 views

is dental acrylic dangerous when heated?

I work in a research lab where we use small screws to attach onto hard objects and secure it with dental acrylic, to maintain durability. The screws are expensive, so when we are done with the ...
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35 views

Choosing electrodes for corrosive environments

Background I'm building a watering robot for my household plants. For the purpose of measuring the moisture content of the plant I intend to use a resisitive approach where I pass an electric current ...
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1answer
36 views

Polluting agents generated by road traffic in a city [closed]

I want to measure the air quality according to road traffic in a city. What are the polluting agents (generated by fuel combustion) strictly related and generated by road vehicles that is worth ...
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1answer
429 views

Osmium tetroxide production [closed]

I know osmium powder will produce osmium tetroxide when exposed to air,but what about solid piece of osmium,such as pellet or ring,finely polished to minimize surface area,will this produce ...
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Cubic zirconia additives and toxicity

What are cubic zirconia (CZ) gemstones usually colored with? According to wikipedia the following dopants are being used: Cerium Chromium Neodymium Erbium Titanium. Chromium is quite colorful ...
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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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Plastic contaminant in the kitchen (from a heated PP bag) - toxicity, cleaning up

In short, a pot of hot soup traveled in a PP bag and landed onto the kitchen table with a vivid unpleasant smell of plastic contamination. Based on the specifics provided below, I seek to identify ...
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1answer
197 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
310 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 ...
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1answer
62 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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429 views

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
66 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 ...
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1answer
61 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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115 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
34 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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2answers
3k views

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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0answers
222 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
571 views

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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86 views

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
44 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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61 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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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
546 views

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 ...
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1answer
58 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 ...
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374 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
81 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
120 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
32 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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75 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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3answers
666 views

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 ...
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2answers
3k 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' ...
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1answer
154 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
52 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
9k views

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
805 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
238 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
116 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
592 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?