Hi! Our laboratory custodian/manager is actually the one ordering the reagents for our classes every semester or every year. So I have no idea. But there are several distributors which you can search online.

This is actually an activity for my students wherein instead of doing it physically they will just be observing and writing down the results. So I can't really say the results

@@violaramos5587 1okay thank you

Additional note pa pala. For the love of god, please use test tube holder when taking the test tubes out of the boiling water and esp. when handling sulfuric acid

Hello thank you for this insight. Laboratory gown is worn in the whole duration of this video. Rest assured that gloves will be worn next time. This was done in a hurry at the onset of the pandemic for the benefit of our students. It was a fault on our end to forget the wearing of gloves.

It was lactose that has got a color change. I guess the same principle applies just like in barfoed's test wherein disaccharides would form precipitate after more than 3 minutes (compared to monosaccharides which only for about >3 mins). I'm not claiming this is true, it's just a hypothesis Edit: I realized sucrose didn't have a color change. Guess I have to agree with u

Here's the link kzbin.info/www/bejne/p5epiJeefr6lZ9E

Any carbohydrate will give a positive result in Molisch test since it is a general test for carbohydrates. Although the reaction would be slower as compared with monosaccharides and disaccharides.

upon a few drops of sulfuric acid, the starch will be converted and will form furfural (or its derivatives). this furfural will then act with the alpha naphtol present in the molisch's reagent, which would consequently form a dark purple ring. this is true to the presence of any carbohydrate in a solution, hence described as the general test for carbohydrates.

Disaccharides are a specific type of oligosaccharides. There are many important disaccharides that’s why in most books there is a separate section for them. But they are examples under the oligosaccharides classification. ☺️

I will take note of this. Thank you!

All reagents used for each test is flashed on the screen.

Hi! It actually depends on your major/course. But for our general students we use Biochemistry book by Stephen Stoker and for a more in depth one you can use Principles of Biochemistry by Lehninger :)

@@daniellekeithabrera4497 It’s actually what I use for my medtech/nursing/nonchem major students

It should be 2 mins, however even if we waited for 2 mins (8min for E) the color of the solution remained the same.

@@violaramos5587 okay, thank you.

Thank you too