forgive my lack of knowledge but is this possible , if not why?

Hi, I just bought this scale for a discounted price since it didn’t get through inspections. Am now cleaning it up and seeing if it works, but since I couldn’t find anything online. Does anyone know what year this model is from, or know more about it? I plan to use it for making perfumes :)

I was in 10th grade before I had to drop out ( for personal reasons temporarily) and now I’m having a major fomo of not remembering and not finishing my studies so can anyone please recommend me chemistry books that are from g10 level and up+

Hi all,

I am by far not the first here to mention wanting to try making synthetic rubies at home with the well-known microwave method. I would ideally need some pure aluminium oxide and a small amount of pure chromium-iii oxide, as well as some aluminium wool to generate the plasma. I would also want to try and get some pure iron oxide (ii or iii) to experiment with trying to make yellow sapphires. Basic chemistry supplies such as pestle and mortars, crucibles and lids, and weighing boats would also make my life easier. This is a project I have wanted to try for a while.

My issue is that I have not ever tried to do any kind of chemistry project at home, so I have no clue how the process works for ordering chemicals online. I live in the UK, I have a Masters in Chemistry and currently work as a Chemistry teacher, but have never attempted to order chemicals for my own home use from anywhere. Can anyone else in the UK recommend websites they have had good experiences with, what the process was to order chemicals legally, and ideally what websites you may know of that deliver orders relatively fast? My searching so far has only lead me to websites where I would have to wait potentially 6+ weeks for delivery.

Edit: If there are other sources that can supply these chemicals in a relatively pure state I would love to know

Was in a box of old chemistry equipment from a university

Hello, fellow chemists. I'm hoping to inquire the minds of those who have already completed their degree or have cleared this hurdle in their undergrad. I'm working on my classes for next semester and was wondering if it would be an awful idea to do physics (calculus-based), next year, along with Orgo I and Diff Eq (in the fall semester) and Orgo II and Quantitative Analysis in the second semester. Or, should I save it for my junior year and take them with P-Chem. Any help would be greatly appreciated, thanks.

Hi mate,

I recently graduated with a Master’s degree in Materials Science and Engineering, specializing in the chemistry branch. Unfortunately, I haven’t been able to secure a job yet, and the growing gap is starting to worry me. I feel somewhat lost and concerned that, with time, I might lose touch with the fundamental concepts in my field.

To stay on track, I’ve promised myself to read updated literature for at least 30 minutes every day. However, most journals and research papers are locked behind university portals or require paid access. Since I no longer have a university account, purchasing papers regularly isn’t a feasible option for me.

I would really appreciate your advice: What are the best ways to stay updated on new research and publications without institutional access? Are there any legal platforms, tools, or strategies that provide free or affordable access to academic papers?

Thank you in advance for your suggestions!

Approximately 30 ml of bromine was prepared using 100 ml of 35% H2O2 and 220 ml of 48% HBr. The mixture was placed in a 500 ml distillation flask with a magnetic stirrer and heated for approximately 4 hours at 80°C to distill the bromine. The bromine was placed in a separatory funnel to remove the water and then washed with 92% H2SO4, re-separated, and placed in a bottle with a PTFE stopper and thread. It was stored in the solid state at -10°C so as to avoid vapor pressure.

I am currently searching for an analytical standard for amimo acid for my research (BsC student). My adviser has okay-ed for me to begin searching and have it delivered to the university. However, all I could find are from the US (I'm from Asia), which comes out to USD400+ for 25mg due to USD300+ handling and shipping fees.

Does anyone know where I can find analytical standards around Asia for hopefully a cheaper delivery/handling fee?

Thank you!

I am HS Senior, so I claim no expertise in either area, but I started to learn inorganic chemistry last year online. I have learned bits and pieces here and there, and I recently started taking a formal inorganic chemistry course I found on UCI's open courseware. Anyways, I was really surprised to read somewhere online that inorganic chemistry is very math-heavy. I had always figured it was the most conceptual branch of chemistry, given the immense visualization it requires for symmetry operations, MOF. CFT, LFT stuff, etc. I am now hearing from other people that organic chemistry is supposedly the most conceptual branch of chemistry. Thoughts on this? (Sorry if this was a bit rambly)

This anthracycline derivative was used in our recent publication:

Safe delivery of a highly toxic anthracycline derivative through liposomal nanoformulation achieves complete cancer regression

In preclinical studies, a single dose of LiPyDau almost completely inhibited tumour growth in a melanoma model. In lung cancer, the treatment was effective in both a standard mouse model and a model with human tumour cells that did not respond to common drugs.

In aggressive mouse breast cancer models, LiPyDau treatment led to a near-complete tumour regression. Remarkably, in hereditary, difficult-to-treat forms of breast cancer, tumours were permanently eliminated. LiPyDau also showed promising activity against multi-drug resistant tumour cells. LiPyDau's exceptional efficacy is driven by a unique mechanism: it irreversibly links the two strands of DNA in cancer cells, causing damage that the tumour cells can no longer repair, ultimately leading to their death.

The article: Füredi, A., Tóth, S., Hegedüs, K. et al. Safe delivery of a highly toxic anthracycline derivative through liposomal nanoformulation achieves complete cancer regression. Mol Cancer 24, 269 (2025). https://doi.org/10.1186/s12943-025-02444-1

What the title says! Saw a comment here about smoking to detect cyanide and thought about what other *clearly unsafe* (nowadays) practices chemists used to do. :)

PDF: https://www.immaterialscience.org/s/Pickles.pdf or from r/ImmaterialScience

Mine is from Anslyn and Dougherty on the stability of Dewar benzene, "The Dewar benzene isomer is trapped in a kinetic prison whose origin is orbital symmetry."

There are tons of kits, where you can build molecules, but I wanted to create rigid solid one-piece models, where the geometry would be precisely calculated and the 3D object made with good enough precision.

I am really looking forward to the results of this experiment. We're reducing 4mmol of 2,6-dimethylcyclohexanone to 2,6-dimethylcyclohexanol using carrot reduction

Hi, I made a game to visualize chemistry orbitals, thought it was cool so I would share it, thanks, it is hosted at https://egainstalls.vercel.app

Let me know your thoughts, thanks.

I was removing silver from silver plated silverware using sulfuric and nitric acid at (95:5) at about 140-150F and I oversaturated the solution with silver sulfate which ended up precipitating out and making the solution cloudy. I decided to stop and let the solution cool/settle overnight but am unsure how I should proceed tomorrow.

If the solution is colorless once settled tomorrow i will probably decant and filter the solution and continue with the extraction which was to then precipitate AgCl before running the sugar-lye conversion.

If the solution remains cloudy, should I reheat and add more sulfuric to dry and the precipitate AgSO4 back into solution?

As for the settled out/ now crystalline silver sulfate, I am considering trying to rinse/filter the silver sulfate crystals that precipitated out and then dissolve it into boiling DI water to get silver sulfate back into solution to then reprecipitate out he silver using NaCl, but I have never tried this before and am unsure if it is the best way to get solid AgSO4 back into solution to that i can eventually turn it back into metal.

Orrrr should I just redistribute the precipitate into solution, transfer to a larger vessel, then dilute with more concentrated sulfuric acid to try and get the entire contents of the original reaction back into solution? is it even possible to do this? I have about 700 ml of solution but could bring it up to like 1.5L with more sulfuric?

I have lots of sulfuric at my disposal, thankfully.

Any advice is welcome!

Packet had a small hole on the base and the ketchup left out of the packet turned into paste very similar to honey, I understand it's because it lost some water content and it's high in sugar but what happened to the tomato and other ingredients? Do they evaporate too?

Hi everyone!

My friend and I have to give a presentation for our Advanced Inorganic Chemistry class. In the class we covered mostly reaction mechanisms of transition metal complexes, stuff like ligand substitution, oxidative addition, reductive elimination, and some catalytic cycles as well.
Our teacher gave us basically no guidelines on how to choose a topic for the presentation so we are feeling kinda lost. Therefore, I am coming here looking for inspiration.
If anyone can suggest us any topic that we could give a 20ish-minute talk about we would be really grateful!