CoronaVirus ==> Empty Shelves

[BobL]

Because most people will have access to a 1g balance as opposed to a 1mL volumetric measuring cylinder here is a recipe for 1 kg of sanitiser using 99 or 100% IPA

	To make 1 kg
731	g IPA 99 or 100%
50	g H2O2 3%
14	g Glycerol 98%
205	g water
1000	TOTAL

It won't matter if you are +/- a couple of g with the last two ingredients or water or +/- 20 g with the IPA

[EDIT]
WHOOPS forgot the water - I doubt it would make much difference to its efficacy- its actually used to help the glycerol mix during the manufacture.
Also mixed my Volume and Masses up ; remember you will need more than a 1L bottle to make this 1kg amount (the total volume will be about 1.2L)
I strongly recommend you read the WHO process about how to make it as it is important and follow the instructs from there in case we got it wrong.
https://www.who.int/gpsc/5may/Guide_...Production.pdf

[FenceFurniture]

Yeah, good idea Bob. I have all my syringes (1ml to 5ml) left over from my vaping days a couple of years or so ago, and went to my default position. Mixing this up tonight took me straight back to the old days....

[woodPixel]

If you are after IMS, The Paint Place sells it on the shelf in 1L and 5L bottles. Can order in 20's.


FF - yes, woolworths is an odd one, but I used to use Hydrogen Peroxide for something in fair quantities and ww was the best price per L at the time..... you know, I cannot recall for the life of me what I used it for, but I had absolutely HEAPS of it!

[BobL]

It's the gel that brings in the only use it three times a day rule apparently. They reckon that stuff gets trapped between the layers of the gel.....but if the gel don't kill that "stuff" then what's the 'king point of it anyway.

It's a bit like WHO saying you must have sterile bottles to put the sanitiser in.
EH?
If the sanitiser isn't going to kill what slight lergies MIGHT be in the bottle after washing, then I wouldn't be too confident about it killing what it is supposed to on my hands.....

Even though the sanitiser may kill bugs, there's lots of "bits of bugs", spores, moulds and chemicals etc that are not good for you so it really is a good idea to sterilise/wash out the bottle.

[GraemeCook]

Because most people will have access to a 1g balance as opposed to a 1mL volumetric measuring cylinder here is a recipe for 1 litre of sanitiser using 99 or 100% IPA

	To make 1 litre
921	g IPA 99 or 100%
62	g H2O2 3%
17	g Glycerol 98%
1000	TOTAL

.....

It might now be far too late, Bob. As I reported in post #98 above after a visit to local pharmacy on Saturday, 7 March:

"It's weird," said the pharamacist, "We haven't sold much toilet paper, but we have had a run on paracetamol and isopropyl alcohol. And so has our isopropyl alcohol supplier."

[FenceFurniture]

As has been mentioned in various places, this virus and disease have names that have been confused, confounded, and cofarked up. I think we should call it what it really is.

Covfefe 19. (thank you Lola)

[BobL]

It might now be far too late, Bob. As I reported in post #98 above after a visit to local pharmacy on Saturday, 7 March:

"It's weird," said the pharamacist, "We haven't sold much toilet paper, but we have had a run on paracetamol and isopropyl alcohol. And so has our isopropyl alcohol supplier."

Yeo I've been trying to get some myself. But just like there will be an oversupply of toilet paper soon the same will be the case for hand sanitizer and IPA.

[Glider]

As has been mentioned in various places, this virus and disease have names that have been confused, confounded, and cofarked up. I think we should call it what it really is.

Covfefe 19. (thank you Lola)

I know what I'd like to call it but I'd probably be booted off the forum.

mick

-

[Glider]

In an earlier life I was an industrial chemist specialising in formulation with a major pharmaceutical company and in the aerosol and cosmetics industry.

You don't need IPA to make hand sanitiser. Methylated spirits will do exactly the same thing. They don't use methanol to denature the product these days, they use either Bitrex or brucine alkaloid to make it too bitter to drink rather than methanol which is toxic. I think they probably use IPA commercially for hand sanitisers instead of ethanol to eliminate the problem of controls related to excise and controlled usage.

If you're looking for hand wash, body wash is identical.

mick

[BobL]

In an earlier life I was an industrial chemist specialising in formulation with a major pharmaceutical company and in the aerosol and cosmetics industry. You don't need IPA to make hand sanitiser. Methylated spirits will do exactly the same thing.

I think the issue with meths is getting it in a pure enough grade to be safely used by everyone. The industrial grade Diggers stuff from bunnings is probably OK for rhino tradie hands but I would be somewhat concerned about using it on kids or seniors, especially with a skin condition or allergies.

Just in case you decide to try it here is the "skin contact" advisory on a Meths MSDS.

Skin Contact: If skin or hair contact occurs, remove contaminated clothing and flush skin and hair with running water. If swelling, redness, blistering or irritation occurs seek medical assistance. For gross contamination, immediately drench with water and remove clothing. Continue to flush skin and hair with plenty of water (and soap if material is insoluble). For skin burns, cover with a clean, dry dressing until medical help is available. If blistering occurs, do NOT break blisters. If swelling, redness, blistering, or irritation occurs seek medical assistance.

Mind you a similar warning applies to straight ehtanol

Wash affected areas with copious quantities of water immediately. Remove contaminated clothing and wash before re-use. If swelling, redness, blistering or irritation occurs seek medical advice.

and IPA

Skin Contact: If skin or hair contact occurs, remove contaminated clothing and flush skin and hair with running water. If swelling, redness, blistering or irritation occurs seek medical assistance. For gross contamination, immediately drench with water and remove clothing. Continue to flush skin and hair with plenty of water (and soap if material is insoluble).

I think they are covering covering their backsides but you then can't say you weren't warned.

[Glider]

I think the issue with meths is getting it in a pure enough grade to be safely used by everyone. The industrial grade Diggers stuff from bunnings is probably OK for rhino tradie hands but I would be somewhat concerned about using it on kids or seniors, especially with a skin condition or allergies.

I think they are covering covering their backsides but you then can't say you weren't warned.

Bob,

Nothing is 100% safe. Anybody, including tradies, can have a reaction to an allergen or irritant. Any solvent or emulsifying agent can and will remove lipids from the skin and may cause an adverse dermatological reaction. Dosage rate, or in this case frequency of use, and the resistance of the patient themselves is generally the key. MDMSs must cover all contingencies or the issuer risks legal action. The addendum on the IPA MSDS is to use soap if the material is insoluble is telling. So yes, they are indeed covering their backsides. Like the melanoma warning from the Cancer Council about exposure to the sun, they have no clear clinical evidence on the minimums, so they can't provide a distinct time. Better to protect oneself than risk it.

In my experience, processes of high volume products like methylated spirits are not interrupted to produce low cost products simply because in most chemical production the final purification phase has no great effect on the end cost. 100% EtOH is post treated after distillation due to the azeotropic minimum in distillation. 96% ethanol is essentially sterile. The absolute classic is "raw sugar". It's white sugar with caramel added later.

Personally I use hand wash and sing happy birthday.

mick

[BobL]

I use hand wash and sing happy birthday.

mick

Thanks Mick. I too use soap and water when I can get it but when on the rare occasions I'm out and about I'm carrying a small bottle of hand sanitizer with me.

I'm supposed to be self isolating but this week has seen me need to go for two x-rays and a GP visit. Was really please to see hand sanitiser readily available at all these places and cleaners constantly cleaning surfaces and patients practicing social distANCING.

SWMBO still can't drive because of her Vertigo (she's been suffering for 6 weeks now) so we've been using online GROCERY shopping but this has not been available this week so I'm driving her to the shops and staying in the car while she dons mask and gloves and does the shopping. She is also way better than me at cleaning and sanitising etc.

I'm going to give the meths a try in the hand sanitizer recipe.

[FenceFurniture]

Mick/Bob, I agree about the harshness of ethanol on skin, particularly coming into drier weather, splits in finger tips etc. So how do you think would it go if the glycerol % was upped at the expense of some of the cold water, but keeping the alcohol content to around 80%?

[FenceFurniture]

Meet Melania's husband, Melatonia.
(have a look at this on a large screen if you can, but best have a bucket handy)
Trump Monster.jpg

[BobL]

Mick/Bob, I agree about the harshness of ethanol on skin, particularly coming into drier weather, splits in finger tips etc. So how do you think would it go if the glycerol % was upped at the expense of some of the cold water, but keeping the alcohol content to around 80%?

I doubt that would make much difference. In fact it might make it worse because it would hold the stuff on hands for longer. The easiest way would be to just use a bit less ie don't completely smother hands so they are sopping wet with the stuff.