5 year old 80% Acetic acid

[MuswellMetro]

Does the strenght of 80% acetic acid decline over time

i have been given a 1ltre bottle that was opened over 5 years ago, then resealed, just wondering if it could have evpaorated due to a poor seal as it smells of acetic acid but to my nose not quite as strong as i expected

it is just a bit difficult to get now as most beekeeping shops will not post acetic due to new PO regulations

 

[jenkinsbrynmair]

it is just a bit difficult to get now as most beekeeping shops will not post acetic due to new PO regulations

Go somewhere else instead - try fleabay, loads there - CWJ still sell it, and post it to you

 

[user 6228]

Does the strenght of 80% acetic acid decline over time

i have been given a 1ltre bottle that was opened over 5 years ago, then resealed, just wondering if it could have evpaorated due to a poor seal as it smells of acetic acid but to my nose not quite as strong as i expected

it is just a bit difficult to get now as most beekeeping shops will not post acetic due to new PO regulations

it will decline only if it has accumlated water. boiling point is higher than water pure 118c. around 80% 107c
hygroscopic

 

[Canary Honey]

It should be fine after this time.
If it freezes when it is say outside in a 4 degree garage it would help confirm purity.

 

[Amari]

Does the strenght of 80% acetic acid decline over time
i have been given a 1ltre bottle that was opened over 5 years ago, then resealed, just wondering if it could have evpaorated due to a poor seal as it smells of acetic acid but to my nose not quite as strong as i expected
it is just a bit difficult to get now as most beekeeping shops will not post acetic due to new PO regulations

We are accustomed to using 80% as that is the strength commercially available (as well as glacial acetic acid @ 100%). Doubtless if what was commercially available was 70% we would be using that. I don't think the exact strength of 80% is vital.

 

[MuswellMetro]

thanks all

 

[oliver90owner]

If it freezes when it is say outside in a 4 degree garage it would help confirm purity.

Not a chance if it was 80%. Doubt it would freeze in a domestic freezer. While glacial ethanoic acid freezes at around 16 Celsius, the freezing point is considerably depressed with only a small percentage of water.

If sealed it should be OK. Amari is right, 70% would be good enough.

 

[Arfermo]

Go somewhere else instead - try fleabay, loads there - CWJ still sell it, and post it to you

Ordered some off the net as price at CWJ without secure postage costs about the same as off the net with shipping included.

 

[farbee]

Totally impossible to predict. If you can be bothered send me some and I can measure it for you. Or just take a punt and use 2 times the amount that is recommended. Will not do any harm and should kill any spores.

I love some of the pseudo scientific answers we get on here. Pure tosh.

 

[masterBK]

Even 60% Ethanoic acid (acetic) is sufficient to kill Nosema spores
see
http://www.oie.int/fileadmin/Home/eng/Health_standards/tahm/2.02.04_NOSEMOSIS_FINAL.pdf

 

[user 6228]

I love some of the pseudo scientific answers we get on here. Pure tosh.

Can you be more specific