Questions tagged [cleaning]

For questions about cleaning agents and methods used to remove dirt, stains, residues, and bad smells, including proper waste disposal. For particular questions about surfactants, use the [surfactants] tag.

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3
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2answers
17k views

Acetic(vinegar) and citric acid as the rust remover

I tested, separately, acetic and citric acids for cleaning steel parts. After 24 hours I have moderate results for acetic acid, and good results for citric acid. But in both cases, rust doesn't ...
0
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2answers
1k views

How to clean a copper pan from black burned fat chemically?

I have several copper pans which I use daily. I don’t have the time to always clean them. Now they have a thick crust of black burned fat. When I wash it with dish soda, nothing changes. And I don’t ...
3
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1answer
260 views

Solvents for tartrates / tannins that won't attack glass

At the bottom of my wine decanter (which due to its shape is fantastically hard to clean mechanically) a layer of reddish brown precipitate forms. I believe this is probably potassium bitartrate ...
4
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1answer
3k views

For what reasons, is isopropyl alcohol widely used as a cleaning solvent?

I have worked in electronics and aeronautics industry 30 years ago, and I have always wondered, what were the specific properties of isopropyl alcohol, which make it used instead of other alcohols ...
2
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1answer
878 views

Rust removal ended with black oxide on the metal?

I have tried to remove common red iron rust from a small piece of metal that looks like steel. I submerged it into hot water with a bit of citric acid, and let it sit overnight. In the morning I ...
4
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2answers
4k views

Reuse 20 litre plastic drums for drinking water?

Would you consider it safe to clean and reuse a 20 litre plastic drum that contained 36% Hydrochloric Acid for drinking water? If so how would you recommend cleaning it?
2
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1answer
48 views

Washing stainless steel separator from organic residue

In my lab we have a stainless steel separator for liquid products of one of our hi-pressure catalytic testing assembly. It is a steel cylinder with two short pipes and one another short pipe with a ...
2
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1answer
2k views

How to remove paraffin wax drop from cam lense glass?

When I put a my cellphone on a table for charging, some drops of paraffin wax were laying there which I couldn't see. After some time during charging, heat melted the paraffin wax and it stuck on the ...
6
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2answers
167 views

How can I make a better whiteboard cleaning solution?

I just started work as a lab assistant in a chem lab. The whiteboard the instructor uses for classes gets very dirty very quickly. The woman who started at the same time as I did spent over 3 hours ...
2
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1answer
1k views

What is the correct way to clean spectrophotometry cuvettes?

The lab I started working in has a spectrophotometer with cuvettes. The cuvettes need to be inspected and cleaned regularly. The senior people in the lab are in disagreement as to the correct ...
1
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1answer
468 views

When we add soap in low concentrations to water it reduces the surface tension. Why? What is the purpose of this?

I understand how soaps lower the surface tension of water but I don't know what the purpose of this is. How does this help with cleaning, removing stains etc?
1
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1answer
104 views

What is the grey film/black sludge from mercury? How to remove it?

How to remove it? Any other simple method apart from distillation. I have a small container of mercury that I’ve collected over the past decade. I opened the container after a few years now and I ...
2
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1answer
31k views

How to reverse damage done by nail polish remover without acetone to a laptop keyboard?

Today I was trying to clean my laptop with a nail polish remover (ingredients: ethyl acetate, peg-40, hydrogenated castor oil, panthenol, parfum, d-limonene, geraniol, ci 26100, ci 60725). Not only it ...
0
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2answers
685 views

Rotten meat odor in plastic

I've been struggling for a few days with the cleaning of a fridge that was left off for a few weeks with raw chiken meat in the freezer compartment. When I found it, the meat had turned liquid with ...
2
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0answers
987 views

Difference between cleaning products [closed]

I have a few cleaning products and after I looked on the ingredients, they feel pretty redundant: Bath cleaner: Less than 5% anionic tensides, anionic tensides, scent. Shower cleaner: Less than 5% ...
1
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0answers
33 views

Homemade Fabreze mystery substance

My wife made a cleaning solution of isopropyl alchohol (1200mL), baking soda (100 mL) and distilled water(2400 mL). She first mixes baking soda with warm water till it dissolves. Then adds the ...
1
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1answer
62 views

Ultrasonic bath operation time

I use an ultrasonic bath in my lab for some chemical treatment of samples. It usually takes several hours with short breaks or even without it. I have a timer at the bath with a limit 90 min. So I ...
0
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1answer
2k views

Methanol vs Ethanol Substrate cleaning

We have to clean substrates, often made of STO or MgO, before PLD for thin film growth. Previously we would use ethanol for sonication to clean the substrates. We recently ran out of ethanol but have ...
5
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1answer
28k views

Which reagent can I use to remove carbon from oven?

I have a practical question: today I have to clean the oven, and it doesn't have self cleaning burn down mode, nor an official scraper I can use... It's full of charred grease and sugar. I managed to ...
-1
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1answer
87 views

Getting rid of the stench

I recently cleaned my dogs kennel. My girlfriend has been putting her puppy in with my older dog. The kennel was thoroughly dirty. Much urine and fecal matter on the concrete. I used a solution of ...
0
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1answer
179 views

Cleaning with sodium bicarbonate

I have a small metal, most likely silver, cross. It is an old object and has turned dark. In order to clean it, my mother told me to boil it for a few minutes in water containing sodium bicarbonate. ...
4
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1answer
205 views

How to clean glassware containing pesticide solutions

I have pesticide (dimethoate) dissolved in methanol in volumetric flasks and graduated cylinders. How do I clean this glassware properly before moving on to the next dilution of a different pesticide.
3
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1answer
6k views

Isopropyl alcohol to clean Nylon plastic

I have a hardwood wooden frame, possibly lacquered, containing some very dirty nylon plastic pieces, a bit like the teeth of a comb, where the frame goes along top and bottom. I know it's nylon ...
22
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1answer
2k views

How can I safely handle a concentrated (fuming) nitric acid spill?

I will shortly be using $90~\%$ or higher concentration nitric acid in a home environment for the purpose of decapping ICs. I understand the corrosive dangers of nitric acid, and most of the important ...
14
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1answer
4k views

Would the mixture of vinegar and baking soda make a cleaning agent?

I've seen it suggested countless times that combining vinegar and baking soda is a great home cleaning solution, but this always seemed like nonsense to me. I recognize that baking soda, a base, can ...
0
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1answer
205 views

How does Drain opener decompose?

I used drain opener (sodium hydroxide and sodium hypochlorite) in an RV and accidentally caused it to drain out (mixed about 1:10 with water) onto concrete below. There is a fairly strong smell. ...
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0answers
4k views

Removing Lysol from oven [closed]

My son put Lysol in the oven, how do I make it safe again? I really don't want to blow up my house over a chicken pot pie. I have new recipe that I really want to try out and it does not include ...
2
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1answer
121 views

Why do cookies prevent toothpaste from foaming?

If I eat cookies and subsequently brush my teeth such that there is still small amounts of cookie material stuck to my teeth, the toothpaste will not foam as well as usually, making the process less ...
1
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3answers
20k views

Why hot water is more effective than cold water in cleaning

Today while washing curtains, my mother dipped them in hot water(containing detergent) for an hour and then washed them.When i asked her that why she done that,her answer was simple(it will make the ...
7
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4answers
6k views

Distilled water to clean greasy stains: Why does that work?

I noticed that distilled water works well to clean away fingerprints on touchscreens or oil stains on a ceramic field after frying an egg. But water and oil/fat are not supposed to mix, so why does ...
3
votes
2answers
6k views

Does a sulfuric acid/nitric acid mixture dissolve PTFE (ie. teflon)?

In our lab, we commonly use a mixture of sulfuric acid and nitric acid to clean borosilicate glassware. I'd like to clean some PTFE pieces in there, too, but not sure if they will dissolve or not. ...
2
votes
1answer
148 views

How can I clean up from electrolysis?

So, I was doing a little experimental electrolysis in my basement. I used 2 (presumably) galvanized steel screws as my electrodes and ran 5A through tap water with a lot of NaCl dissolved in it (to ...
3
votes
1answer
660 views

Will washing child seat belt straps with baking soda and hydrogen peroxide make them unsafe to use?

My friend is afraid to use the child seat for her next child. She was told washing them with the solution weakened the fabric, The straps weren't submerged, but they did get throughly wet.
4
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1answer
282 views

What are these stains on my stainless steel pans?

I've had enough of the homemaker advice of baking soda or barkeeper's friend products - their advice isn't working. I need a chemist! Please see the two photos below. This pan isn't quite as clean ...
1
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0answers
958 views

Crusty white armpit stain that can't be removed by washing

Some of my t-shirts (the ones that are 100% cotton) started developing this strange armpit stain: it makes the fabric feel brittle and crusty around it; it can't be washed off with water and ...
2
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2answers
1k views

Dichloromethane cleaning

Is it safe to drink out of a bottle that use to contain Dichloromethane? What should I use to clean a bottle of Dichloromethane? Is there any chemicals that I could use to dissolve the ...
2
votes
0answers
840 views

What would be a safe/good surfactant for ultrasonic cleaning vinyl records + distilled water and isopropyl alcohol

Title pretty much says it all besides the type of records I believe are pvc (60s - current, someone correct me if there may be other materials but I absolutely don't have any shellac records) and I ...
1
vote
3answers
802 views

Best way to clean a gold-plated yoyo bearing?

I have a gold-plated yoyo bearing which needs cleaning. Most people clean regular non-gold-plated bearings with mineral spirits (naphtha), lighter fluid (hexane/heptane), and acetone, but these gold ...
8
votes
3answers
7k views

What are the best chemical liquids to clean metallic surfaces?

I'm just a simple man curious about things. I've no big understanding of chemistry. I had this question today in mind. What chemicals could I use to achieve the cleanest metallic surface? For example,...
6
votes
1answer
147 views

Definitive Guide To Removing Stains From Baby Clothes

I'd like someone to explain, scientifically, what makes some baby clothes' stains so hard to remove, and what the right way to treat the stains is, chemistry-wise. A lot of internet sites have ...
1
vote
0answers
205 views

Is there a chemical that will etch antimony but not stainless steel?

I am working with ultra high vacuum equipment made out of stainless steel that has been contaminated with a number of metals, but in particular Antimony. We'd like to do some machining of the ...
0
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1answer
1k views

How to determine the products of a redox reaction

I'm doing a paper on water treatment methods, and in one section, I'm describing how a nearby water treatment plant is removing Trichloroethylene ($\ce{C2HCl3}$) from water by oxidizing it using Ozone ...
2
votes
1answer
462 views

Autoclaving certain plastics?

My professor is letting me use the autoclave in the future, but I am a novice. I asked him what materials were safe to autoclave for my notes, materials meaning glass or plastic-ware. He stated, "...
1
vote
1answer
1k views

How to dissolve the build-up from a paraffin based oil?

I have a CNC lathes that use "oil" for cutting fluid during the machining of mostly metal materials. Typically a heavy paraffinic based cutting oil (petroleum distillate) is used during machining. ...
3
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1answer
2k views

Cleaning stains with hydrogen peroxide and bleach

A while back, I discovered that if you have a stain on a white shirt, you can remove it by putting hydrogen peroxide on the stain, then adding some bleach to it. I have used this for getting out wine,...
9
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3answers
2k views

How do we get rid of dangerous explosive acetone peroxide and nitroglycerine?

Imagine the police (or army or whoever's job is that) found out that some maniac placed a lot of primary explosives under a building. They have evacuated the building and deactivated the trigger. ...
6
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3answers
1k views

How to achieve clean dishes and glasses?

I heard that there is a standard about cleaned glass, namely Chemically clean glass supports a uniform film of water, with no hanging droplets visible. I tried to clean my dishes at home using ...
2
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0answers
820 views

Why does the black powder that comes off aluminum pans behave the way it does?

When I wet an aluminum pot or cookie sheet and then dry it with a towel, it creates dark gray marks on the towel. This happens more if the aluminum is a little rough. It seems that there's a fine ...
3
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1answer
162 views

Why isn't washing up liquid dry

Washing up liquid is wet and it is added to water. Why does it not come in a half size package and you add the water yourself? In the same way washing powder is?
5
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1answer
287 views

Simple and cheap anti-graffiti layer based non-paint solvent

I have this issue with a group of people intentionally damaging a bench. So far, they would paint curses over the bench with permanent marker. However after I removed the curses with ethanol, they ...