Formulation I
To produce final concentrations of ethanol 80% v/v, glycerol 1.45% v/v, hydrogen peroxide (H2O2) 0.125% v/v.
v/v is volume on volume basis in concentration.
Pour into a 1000 ml graduated flask:
ethanol 96% v/v, 833.3 ml
H2O2 3%, 41.7 ml
glycerol 98%,14.5 ml
Top up the flask to 1000 ml with distilled water or water that has been boiled and cooled; shake the flask gently to mix the content.
or
Formulation II
To produce final concentrations of isopropyl alcohol 75% v/v, glycerol 1.45% v/v, hydrogen peroxide 0.125% v/v:
Pour into a 1000 ml graduated flask:
isopropyl alcohol (with a purity of 99.8%), 751.5 ml
H2O2 3%, 41.7 ml
glycerol 98%, 14.5 ml
Top up the flask to 1000 ml with distilled water or water that has been boiled and cooled; shake the flask gently to mix the content.
Only pharmacopoeial quality reagents should be used (e.g. The International Pharmacopoeia) and not technical grade products.( and not off the shelf at the hardware shop or chemist products at all)
Preparation
1.The alcohol for the chosen formulation is poured into the large bottle or tank up to the graduated mark.
2.H2O2 is added using the measuring cylinder.
3.Glycerol is added using a measuring cylinder. As the glycerol is very viscous and sticks to the walls of the measuring cylinder, it can be rinsed with some sterile distilled or cold boiled water to be added and then emptied into the bottle/tank.
4.The bottle/tank is then topped up to the corresponding mark of the volume (10-litre or 50-litre) to be prepared with the remainder of the distilled or cold, boiled water.
5.The lid or the screw cap is placed on the bottle/tank immediately after mixing to prevent evaporation.
6.The solution is mixed by gently shaking the recipient where appropriate (small quantities),or by using a wooden, plastic or metallic paddle. Electric mixers should not be used unless “EX” protected because of the danger of explosion.
7.After mixing, the solution is immediately divided into smaller containers (e.g. 1000, 500 or 100 ml plastic bottles).
8.The bottles should be kept in quarantine for 72 hours. This allows time for any spores present in the alcohol or the new or re-used bottles to be eliminated by H2O2.
MINIMUM KIT I'd use if I wanted to make handsanitiser at home
( I actually have all this stuff stashed in a filing cabinet in my study from my researcher days).
laboratory grade borosilicate measuring cylinder 500 cc is a useful size, more times you divide the volume the more times you increase the chance of making a mistake and getting cumulative volume wrong.
laboratory grade borosilicate volumetric flask 1000cc +/- 0.001cc for mixing.
100ml analytical borosilicate burrette for smaller volumes
and
retort stand with burrette clamp
and
borosilicate laboratory filter funnel to prevent spills when decanting
+ safety glasses (of cause) don't want these liquids getting splashed in eyes.
+ disposable gloves
I don't use Facebook except rarely , but I think this is important information that needs as many people as possible to see it and act on it so I have posted the above on my page and made the post available globally.
I suggest everyone here do the same. This information has the potential to save millions of lives in this covid-19 pandemic and needs to be known in order get rid of the online home remedies and dodgey online hand sanitizer recipes that are everywhere and WHICH WILL NOT WORK (hence are dangerous).
