Chemicals Definition and 80 Threads

From the article in phys org. today. https://phys.org/news/2024-08-evidence-stacks-poisonous-toxic-dyes.html "The Lipscomb book project, the team used three spectroscopic techniques: XRF to qualitatively check whether arsenic or other heavy metals were present in any of the book covers...

Hi, to begin with, I am a bit of a chemistry noob. I came across this YouTube video from a channel called SciShow explaining the 5 most dangerous chemicals. In short these are the 5 chemicals listed in the video and why. ”Germany, 1939. In a secret bunker on the German-Polish border, Nazi...

What are the common and/or possible chemicals that could release from clothes or bedclothes when it is exposed to sunlight? Since there are many different textures and additives so I am concerned about the common chemicals that could release I roughly know that sunlight will break a lot of...

Even if how careful we are, I think it is hard for us to avoid TRACE amount of unknown chemicals that get into our body unconsciously, through different pathway, our mouth, our nose and our eyes or our wound. Could our body handle these foreign chemicals in trace amount and keep us healthy? Does...

Could customs x-ray security check find out if there is trace of toxic chemical left in the product? I do NOT mean illegal drug because it is supposed to be found out, but how about if there is any trace of other toxic chemicals? Could it be found out?

I soaked the following school medallion in water with salt for 20 plus years in the attic and at that time I didn't know copper could corrode and make green oxides. I also didn't think about it much and just forgot about it. I brought it down just today. I read just a while ago that hot...

Ok so I am building a fume hood What materials are the most resistant to chemicals that are also cheap? also what cfm fan can I use to suck out the air? (asking for someone knowlageable) cats

Hi, everyone. I would like to test for the reaction between carbonic acid and copper (to simulate the effect of acid rain on copper). However, I find that many supplies failed to provide carbonic acid (either in powder or liquid form). Some says that carbonic acid is unstable and thus cannot...

Is there such a thing of a protein (or some other biochemical) being coded to leave the cell, do something (or not) and then return for another function in the cell? Or in some way go "in and out" throughout its existence? Or at the least that would "take a leave of absence" and then become...

I saved 75 used hearing aid batteries and threw them into a fire. It took about 8 seconds then, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom, boom,boom, boom, boom, boom, boom, boom, boom, boom, boom, boom,boom, boom, boom, boom, boom, boom, boom, boom...

I wanted to bring to your attention what I think this is one of the most ambitious chemistry projects to be found on youtube: A guy with the pseudonym of NurdRage or Dr. Butyllithium tried to synthesise a medication called Pyrimethamine or Daraprim which is effective against Toxoplasmosis from...

I just got 2lbs of 99.8% Pure KNO3 Powder in the mail. It came in a kind of sketchy bag. I want to contain somewhere safe, so... where should I put it? Is an old Pretzel Snack plastic container good enough, or do I need a good seal?

Is it possible to oxidate HF to F2 putting HF in contact with oxidizing compounds only, that is, without using electrolytic cells or, however, electric energy in general? Thank you. -- lightarrow

Not sure if this is well know but for some reason, I don't know if exactly same chemicals make chemical reactions with one another and if yes, how common that is?

Hi everyone... Being in the forum really feels good, Now I don't have a science backgroud And I have a agrochemical related questions so in what forum should I look and ask? Have a great day everyone...

I have a chemical reagent that says: Assay ... 93.0 ~ 103.0% Which value should I use in theoretical computations? Should I take the average or the lowest value? Thanks!

A little complicated and interesting story, I will get down to the point: I need a number of substances that cause skin rashes/skin redness or overall has a bad reaction to human skin. This is all for research purposes for natural skin products me and a group of friends are developing.

Dear scientists, I had stupidly put a few boxes of Acuvue Moist Contact lenses together with a plastic bottle of "extra mild dissolvant" (nail polish remover) these stayed in the same bag in a closed cupboard for months before I noticed it. The dissolvant contains Ethyl Acetate, Butyl...

Seems like the US is having a raw deal, have you checked your water is safe to drink? https://www.sciencedaily.com/videos/0233de5148b63e6e2bd95b0fcb0daca8.htm

Hey guys i wanted to know how make some chemicals when i have an equation, for example:

Hi there Do you all have any chemicals that you can think of in a laboratory that give off a very strong smell and should be used under the chemhood I just used Glacial Acetic Acid today and I had no idea how strong the smell was . from now on I am using it under the chemhood I have created a...

Hello I'am a high school student doing a science fair project on the chemicals and heavy metals found in both natural water sources(lakes,rivers,streams) and bottled. I'am looking to see if anyone has information like a list of chemicals and heavy metals found in both sources. any reply is...

Hi, So I recently got a new job, and when I was being instructed on how to close my department, I noticed that they used quite a bit of chemicals on the same surface (it's a salad bar). I was wondering if any of these chemicals could interact, and if so, what the products would be. First, the...

I am developing a model of dissolved oxygen (DO) consumption by yeast in the fermentation process. I would like to use a solution that will predictably take up DO over the course of 1 or 2 hours so that I can test a more basic model with the laboratory equipment I have. This would prove I have...

Hi, I'm new here :) I recently moved in with a new roommate who seems to use tigerbalm quite frequently he said its help elevate his allergy but I have some collections of both vintage and new star wars figures and miniatures I'm wondering whether vapour of chemical from Tigerbalm and or grease...

What are the different ways to detect harmful chemicals in food? I need to find at least 5 tests for different chemicals for my chemistry investigatory for my final exams. I have only chemicals available in a standard lab in my hand.

Hi all. I recently came into the possession of a fair amount of various chemicals in various amounts. It's not anything outrageous (mostly a lot of ionic silver and lutetium compounds), so eBay would accept it, but I was just wondering if there was a better alternative.

what should the price of this be?

If the question doesn't make sense how 'bout this one: "What chemicals should an amateur chemistry lab should have for experimentation?"

Note: My english isn't well. Everyone knows toothpaste's has chemicals in variety. Floride is the main chemical. But how do you know if its not harm your health in the future? May be it cause cancer in the future. So what precautions do you take when you brush your teeths? How long have you...

Making an explosive volcano without chemicals? HELP! So here's the deal. I have to make a volcano that does not use chemicals or substances (potassium nitrate, baking soda, vinegar). It has to use mechanical parts to symbolize a volcanic eruption (ie springs for pressure). Any ideas? I have...

I have 9 white solids which i need to identify. Aluminium ocide (Al2O3), Calcium Oxide (CaO), Sodium dithionite (Na2S2O4), aluminium sulphate ( Al2(SO4)3 ), Ammonium sulphate (NH4)2SO4, calcium nitrate ( Ca(NO3)2 ), Magnesium sulphate (MgSO4), sodium carbonate (Na2CO3), Sodium thiosulphate...

I'm just a hobbyist learning basic chemistry for fun home projects. The first thing I'd like to try out is the Chloride test which requires potassium chromate and silver nitrate. I'll only need less than 50g of each compound. Where's the cheapest place in the UK to buy this stuff? 50g of...

In the matter of 30 seconds, preferably. So far it seems Sulfuric Acid, Hydrogen Peroxide and Permanganate in a cocktail will suffice. Are there any faster, cheaper methods? Thanks :)

I am taking the OSHA 30 course as a requirement of a job and came across some information regarding the danger of welding on materials that have had chlorinated solvents applied. Being someone who manages industrial construction projects, but often doesn't supervise welding operations, I am not...

Hello, how could I make a powder became solid ? Do I need some chemical that can solidify it ? thank you

Hi, I was wondering if anyone knew of a chemical that trap odour? The idea is to design cat-litter using perlite as the main ingredient however; as perlite doesn't have 'odour-trapping' properties I was hoping to mix it with another chemical... Thanks...

is there any acid or base or any other chemical which can dissolve carbon particles or tar but will not effect alloys like steel.

I know that CuSO4 is blue or PbI is yellow. Is there any way to remember the colour of all chemicals?

I have recently gotten fascinated with chemistry, and I am looking to start it as a hobby. However one, of the things I want to have under control before i start is chemical disposal. Does anyone know a good cheap company I can hire for hazardous materials disposal? I have heard from a printer...

I was studying what kind of chemicals are used in various processes like thermite welding , rocket propellant. On what basis are these chemicals used? In welding Al + Fe2O3 is used. Why not Sodium and some weaker oxide as sodium is an alkali metal and highly reactive In rocket propeller H2O2...

Does anyone know of a reference to a list of all known chemicals that freeze at less than 50 K? I know lots of organic molecules do, but I don't know which ones. I also can find the freezing points of all the elements pretty easy, but chemicals are proving more elusive.

At work we use; Powder Bleach, ACTIVE INGREDIENT: Sodium Dochloroisocyanurate and A cleaning agent, ACTIVE INGREDIENT: Sodium Dodecylbenzene sulfonate These two chemicals are to be used separately but we have the sudden rumour that when mixed in a mop bucket it is significantly more...

Dear Fellow Members, I am presently trying to write a Fortran 95 program to separate acids from a list of chemicals in a text file and then write them to a second text file. The program first matches the word "acid" and is then supposed to check if the word preceding the word...

Q. A volume of 100 cm3 of 1 mol dm3 sodium hydroxide solution was added to 100 cm3 of 1 mol dm3 hydrochloric acid.The maximum rise in temperature recorded was T1.The experiment was repeated with 50cm3 of each solution and the rise in temperature this time was T2. It is found That A) T1 Is...

Does anyone know which, if any, liquids or chemicals absorb infrared light but not visible light? In other words, something that looks clear but appears dark or black when viewed in infrared. Help is greatly appreciated!

So in high school we learned that chemicals with very few valence electrons want to get rid of them so that they can have a full outer shell, or if they only need a few more to get a full outer shell then the desperately try and get them. The teacher made an analogy that the atom really wants to...

Are there any commercially available chemicals that can assist in Hydrogen Gas remediation? Thanks.

I'm looking for certain chemicals that glow with specifics colors when exposed to an electric current.

For a while, I've been stepping outside my comfort zone a bit and working with really moisture-sensitive chemicals (isothiocyanates, carbodiimides, succinimides, etc.: stuff that rapidly hydrolyzes and loses functionality). Even though we only purchased a tiny amount each time, we only used a...