[zesty]

Slightly confused here.

Household bleach is usually around 4-6% sodium hypo.

The strength at which I clean render etc is usually less than 2%. It works.

So I'm surprised household bleach is so much stronger? Amazed there isn't more injuries from daily use.

Or am I wrong here? Is the household bleach 6% but at a lower SH strength?

[Plankton]

No your right, you are slightly confused 6% active ingredient is very strong and I always point this out to my insurer when they ask do you carry chemicals "the products under your kitchen sink is stronger than I use" is my answer. It's not just sodium hypochlorite that's in your supermarket "bleech" along with numerous agents there's sodium hydroxide as well.

[zesty]

I see,

So we are using a much weaker mix than shop bought bleach.

I find even a 1.5% mix is enough for most jobs, let alone 6%!

Mind you, the shop bought bleach is usually mixed with water to dilute it down, but still, it's strong stuff for joe public to be using daily...

[Smudger]

I'm going to confuse everything here !!

household bleach contains ( usually less than  ) 6 % - thats 6% of sodium Hypochlorite  ( the strength of the Sodium Hypochorite is not shown ) so my guess would be that its 12% strength

when buying Sodium Hypochlorite at 12% your drum of chemical is 100% sodium Hypochlorite  if you thin this down say 3 parts water to 1 part Hypo your mix is still 33% compared to household 6% so is 5 times stronger

Darran

[JandS]

25 per cent

[zesty]

I'm going to confuse everything here !!

household bleach contains ( usually less than  ) 6 % - thats 6% of sodium Hypochlorite  ( the strength of the Sodium Hypochorite is not shown ) so my guess would be that its 12% strength

when buying Sodium Hypochlorite at 12% your drum of chemical is 100% sodium Hypochlorite  if you thin this down say 3 parts water to 1 part Hypo your mix is still 33% compared to household 6% so is 5 times stronger

Darran

Totally get that smudger,

I usually dilute mine down to 2-3%, so a lot less than household bleach...

[Smudger]

does that actually work at that strength ??

Darran

[Plankton]

2-3% of active ingredient... diluting 3l of 14% abv down to 3% by adding 11l of water.
Dilutions are based on the strength of the active ingredient, no point trying to over complicate it.

[Smudger]

2-3% of active ingredient... diluting 3l of 14% abv down to 3% by adding 11l of water.
Dilutions are based on the strength of the active ingredient, no point trying to over complicate it.

 

[JandS]

Alan Ritchie is correct...to get 1 litre of 3% SH from a stock solution of 15% mix 200ml of SH with 800ml of water.

[zesty]

does that actually work at that strength ??

Darran

Hi Darren, yes it does, for cladding and render it’s absolutely fine. Not for roofs of course.

I use a 60 litre barrel, around 7-8 litres of of SH (14-15%), and the rest water mixed with surfactant. This produces around 3% or just under of SH mix.