How to make Iodine Crystals


  2% Iodine tincture extraction method


Making Iodide crystals by  using store bought tincture of iodine


Tincture of Iodine


Isolating Elemental Iodine from Potassium Iodide



 2% Iodine tincture extraction method


 First, I will explain some of the acronyms that will appear in this tutorial. DH2O is for distilled water. It is just H2O, which is water, with a "D" for distilled in front of it. Next, H2O2 is hydrogen peroxide. For this iodine crystal extraction, we will be using a store bought 3% H2O2 solution. HCL is the next acronym on the list. It stands for hydrochloric acid. It can be bought at any hardware store, usually as a driveway or pool cleaner. The label will usually say muriatic acid, which is a solution of HCL around 30%.


 Now to the extraction. Always remember to wear safety equipment! You should always at the very least have on goggles and gloves rated to withstand what you are working with. Never breathe in any vapors coming from the chemicals you are working in. ALWAYS do this in a well ventilated area

In a ratio form, this is what you will be using for reagents:

Four parts 2% iodine tincture

One part DH2O


 Two parts 3% H2O2


 You will also need .75 ml 30% HCL per fluid ounce of iodine tincture. You will need a container to hold all of the fluids you now have in front of you. It doesn't matter if its a bowl, jar, beaker, or anything else. Just make sure to always use glassware.


 FYou start out by pouring the iodine tincture into the container. Slowly add the DH20 and stir, but always avoid splashing. Then, slowly add the HCL and stir.


 At this point, you need to wait for about 15 minutes to let the reagents do their work. --- After you have waited 15 minutes, add the H2O2 slowly while stirring. At this point, you need to wait for 12 hours. --- Now, you need to have a filter and another container ready. I recommend an ultra fine plastic mesh cone filter. It won't clog, and it won't absorb any of the liquid. Sometime the color will be too dark, and you can add a bit more H2O2 and let it sit for a second pull. Now you need to rinse the crystals that remain in the filter with copious amounts of water. After this, spoon or tap them onto a stack of three coffee filters. Fold the filters so nothing can come out. Now take some paper towels and wrap them around the filter and try to get as much of the moisture out as you can. The final step is to drop the still closed filter into a container with Damp-Rid or any kind of moisture absorbing product. If you chose to add more H2O2, proceed in the same fashion for the second pull. --- The final product from the iodine crystal extraction should be stored in an air-tight container where little light is present. Light and moisture will degrade your iodine crystals.


FThe second iodine extraction method is a newer one, formed from my own experimentation. Its main advantage is increased iodine crystal yield. For anyone who will actually be using the product instead of just performing the iodine crystal extraction for fun, this will be a huge benefit for you.


 For this iodine crystal extraction, the same acronyms apply, and the same safety procedures apply as well. Please do not bypass the safety procedures on this extraction or any technique using chemicals.


 7% Iodine tincture extraction method

The reagents you will need are:

One pint 7% iodine tincture

One pint 3% H2O2

Two cups DH2O

 One ounce HCL


1) Pour the iodine tincture into a gallon or half gallon jar. 2) Slowly pour in the DH2O and mix well. 3)Now pour in the HCL, stir, and wait fifteen minutes. 4) After the fifteen minutes, slowly pour in the H2O2 while stirring. Seal the jar with a lid. If the lid you are using is metal, make sure to put saran wrap or a Ziploc bag over the mouth of the jar and rubber band it tightly in place. Let the mixture sit for twelve hours. Now, you need to filter the crystals out with a ultra fine plastic mesh cone filter, or any filter of your choice. Make sure to save the liquid. Tap the crystals into a stack of three coffee filters and wrap them up. Use paper towels to dry as much of the moisture out of the filters as you can. Finish by dropping the still wrapped up iodine crystals into a container of Damp-Rid or any kind of moisture absorbing product. Now, add another one-quarter cup H2O2 to the liquid and repeat the previous steps the harvest another five to ten grams of iodine crystals. You should yield 45-48 grams of dry iodine crystals from this method if done correctly. --

 The final product from the iodine crystal extraction should be stored in an air-tight container where little light is present. Light and moisture will degrade your iodine crystals.



Making Iodide crystals by  using store bought tincture of iodine

30 mls of Hydrochloric acid or muiriatic acid –1/2 :1 ratio to a 30 ml bottle---so if using 60 mls the  then you are using 15 mls of HCl acid to 30 mls of Iodine

then you are adding 60 mls of Hydrogen peroxide to 60 mls of iodine---again here it is a 1:1---start of with adding the iodine in a container per every 30 ml then follow the ratio to acids ( 15ml) and peroxide ( 30 ml)  mix well til there is separation when separated then filter out the components and then rinse at the end with water—-you will have a Iodide crystal




Tincture of Iodine

Add 2 g of Iodine to 45 mL of ethanol and dissolve.

Dissolve this mixture in 55 mL of distilled water.

Add 2.4 grams of KI to this mixture and dissolve.



Isolating Elemental Iodine from Potassium Iodide


 Iodine crystals are used in a couple of the experiments in the book. When I wrote those sections, iodine was freely available, but the DEA recently moved iodine to List I, which means it now requires completing paperwork and showing ID to purchase iodine. Fortunately, there's a very easy way around this problem. You can isolate elemental iodine from potassium iodide, which is included in one of the chemical kits. To do so, take the following steps:


 1. Weigh out 2.0 g of potassium iodide and transfer it to a test tube.


 2. Add about 1.5 mL of distilled water to the test tube and swirl to dissolve the potassium iodide.


 3. Add 1.5 mL of concentrated hydrochloric acid (or about 1.8 mL of hardware store muriatic acid) to the test tube and swirl to mix the solutions.


 4. Add about 10 mL of drugstore 3% hydrogen peroxide. The solution immediately turns dark brown as the iodide ions are oxidized to elemental iodine, which precipitates out.


 5. Swirl the test tube to suspend the iodine and pour the liquid through a funnel with a folded piece of filter paper to capture the iodine crystals.


 6. Rinse the iodine crystals on the filter paper several times with a few mL of distilled water. The rinse solution appears brown from dissolved iodine, but iodine is not very soluble in water, so you're not losing much of your yield.


 7. Spread out the filter paper on a watch glass or saucer and allow the crystals to dry thoroughly. Iodine gradually sublimates (passes directly from solid to gaseous form) at room temperature, so don't leave the crystals exposed to air any longer than necessary to dry them.


 8. Once the crystals are dry, transfer them to a sealed storage bottle or vial.


 These quantities produce a gram or so of iodine, which is sufficient for the experiments that require it. If you need more iodine, simply increase all quantities proportionately.