Questions tagged [toxicity]

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

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25 views

Non-toxic organic bases? [closed]

I am trying to find out if there are any non-toxic organic bases that could be given orally on a non-empty stomach to treat acidosis. From my research, histidine and diluted choline hydroxide were the ...
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2answers
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How can I remove the bitartrate anion from an organic bitartrate salt?

I have a compound, dimethylaminoethanol (DMAE) bitartrate, which I originally purchased as a supplement and possible smart drug. I bought an absurd amount of it. It didn’t do anything for me as a ...
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Cadmium Selenide, Cadmium Sulfide, Cinnabar and Lead Oxide toxicity

I have a question about the toxicity of the pigments Cadmium Selenide (Cadmium Red), Cadmium Sulfide (Cadmium Yellow), Mercury Sulfide (Cinnabar or Vermillion) and Lead Oxide (Lead White). Not long ...
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Do any pharmaceuticals increase in potency or toxicity over time?

Pursuing a question raised in these comments: Are there any known pharmaceuticals that increase in potency or toxicity during storage, or over periods of months to years? If not, what if we broaden ...
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1answer
26 views

Does toxicity depend on state of matter? [closed]

Does the toxicity of an element depend on the state of matter (liquid, solid, gas)? Could there be an element, which is totally non-toxic when it is solid, but toxic when it is liquid. Which elements ...
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38 views

How is mercury in drinking water detected? [closed]

A document I've been reading states that: Both the Maximum Contaminant Level Goal and the Maximum Contaminant Level were set at 2 parts per billion because current technology allows public water ...
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0answers
28 views

Risks of using organic mercury compounds in analytical chemistry

I'm interested in speciation analysis. Hearing of fatal accidents with organic mercury compounds made me wonder about the risks for the analytical chemist trying to determine Hg species in foodstuff. ...
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2answers
82 views

Does water in big cities get heated (boiled) for treatment?

I live in Bangkok and read how water comes to customers here: I understand from the chart that water go through Thon Buri treatment plant (west Bangkok) and Mahasawat treatment plant (east Bangkok) ...
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1answer
91 views

Indigo and the Environment: is it that bad?

TL;DR: In what aspects are the products of the indigo vat dyeing process (sodium sulphate, sulphite and thiosulphate ions) harmful to the environment or to living beings? I was recently looking into ...
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2answers
379 views

How does one tell (or conclude) if a substance is carcinogenic?

It's common to read statements like: Tetrachloroethene ($\ce{CCl2=CCl2}$) was earlier used as a solvent for dry cleaning, but since it contaminated ground water and is a suspected carcinogen, ...
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5k views

Why is potassium ferrocyanide considered safe for consumption, when it is just one reaction away from the highly toxic potassium cyanide?

According to this answer, heating potassium ferrocyanide will decompose it into potassium cyanide. Now, potassium ferrocyanide is an approved anti-caking agent, and hence used in table salt, for ...
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1answer
35 views

If heavy metals bind to sulfur why isn't sulfur used as a safer way to chelate them? [closed]

I was wondering about sulfur as an alternative life-threatening chelators. Why isn't sulfur used as a chelator if heavy metals have an affinity for it?
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Water replacement for pressure-testing [closed]

Due to circumstance, our Data Centre build has some delays and it currently looks like we're going to have to perform a hydrostatic test of our sprinkler system with live computers in it. As I have ...
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1answer
62 views

Cup with vinegar/salt/copper solution previously in it ran through dishwasher

Someone enjoys making jewelry, and saw an online tutorial saying that you can mix equal parts of vinegar and salt, and leave copper in it for a while to oxidize it, and turn it green. After doing ...
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3answers
3k views

Chilling water in copper vessel

Does chilling drinking water in copper bottle result in any chemical reaction that turns it dangerous for consumption in any way? Few days back, in summer, I carried kokum juice in copper bottle. I ...
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1answer
54 views

How to determine toxicity of a substance? [closed]

I often read description of various compounds or elements as being poisonous. Now I know that through experience we have discovered the toxicity of various substances like lead, chlorine or phosgene ...
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1answer
3k views

Does melting HDPE plastic produce toxic fumes? (melting, not burning)

● The question isn't about burning HDPE but melting it at the proper temperature. (At 120 to 180°C depending on it's density, it becomes gooey. According to the source below the "extrusion" ...
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3answers
845 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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1answer
651 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
100 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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0answers
260 views

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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1answer
1k 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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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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1answer
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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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70 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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0answers
51 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
40 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
446 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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215 views

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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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
8k views

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
547 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
417 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
77 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
819 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
79 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
70 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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127 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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2answers
8k 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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1answer
291 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
65 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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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
1k 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
64 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 ...