CO2 cylinders are disposable and compatible with all brands of soda syphon. Each charger holds about 2 litres of carbon dioxide gas, which is enough to aerate on litre of liquid. Every charger contains only pure (100%) gas made in endorsed chemical plants.
Each gas cylinder can only be used once and cannot be refilled – the steel from which they are fabricated can be recycled.
NB: these are food-safe carbon dioxide cylinders, not to be confused with the ones intended for inflating bicycle tyres.
Related information on Carbon Dioxide:
Increase your carbon footprint with 100 carbon dioxide chargers - get fizzy as the oceans rise up and the polar bears starve. Whilst the world is watching their output of carbon dioxide (as well as methane and nitrous oxide) exactly how much difference will a box of 100 CO2 chargers make?
To answer briefly: no a lot, so no need to feel guilty about the pleasure induced by your soda syphon celebrations. The average person in the UK will release 8.5 tonnes of CO2 per year, so the 8 grams in your charger are nothing to really concern yourself about – so fizz away! If you begin to feel too guilty then simply plat a tree to off-set your soda syphon.
100 CO2 Chargers
One use of Carbon Dioxide chargers is to make fizzy drinks – that is after all why you are on this page looking at 10 CO2 chargers for your soda syphon. There are plenty of other uses for CO2 canisters, and in order to educate and amaze I will take the time to tell you about some of them.
To begin with, I'll start with the obvious – Carbon Dioxide is used in the food industry, in particular in the fizzy drink industry. It makes water go fizzy, but it also gives it a flavour. This is entirely different to the nitrous oxide chargers, which impart no flavour and don't make anything fizzy!
Carbon dioxide dissolves and reacts with water, the reaction is as follows:
Water + Carbon Dioxide → Carbonic Acid
H2O + CO2 → H2CO3
The reaction is called carbonation and was observed by Joseph Priestly. Priestly didn't pressurize the Carbon Dioxide into the water but just sort of wafted it over the surface, the result of this was water that had the taste of “soda water” but wasn't fizzy. Four years later in 1771 the another scientist used the same idea (a reaction of a carbonate with acid) to produce Carbon Dioxide but he put the whole apparatus under pressure to make the water fizzy.
The more astute of you will see that acids react with carbonates to produce carbon dioxide and carbon dioxide reacts with water to produce a carbonate, this means that there is a state of equilibrium in soda water – if it was left in an open system, then not only would it go flat but it would also lose it's carbonation flavour.
In the early 19th century, then the earliest incarnation of the soda stream, or soda syphon was born. Nobody had yet invented the disposable carbon dioxide cartridge, so the apparatus produced the gas in one one reaction vessel, which was connected to another that contained the water. So as the gas was produced, the system became pressurized and the water became carbonated.
Temperature is important in the making of soda water, an increase in temperature results in a decrease in solubility of CO2 in water. This is known by soft drink producers that take the liquid as close as possible who reduce the temperature to as close as possible to zero before using the CO2 gas to carbonate the drink.
Some of the original recipes for carbonating water were attempts to recreate the natural sparkling waters of spas, but there is more to those than just carbon dioxide gas. If you want to try to recreate a “soda water” that is closer to the natural spring water, then there are other salts that you need to add. Every mineral water is slightly different, but you can recreate something similar by adding the tiniest pinches of salt, sodium hydrogen carbonate (baking powder) and Magnesium Sulphate (Andrews Salts). And I really do mean add a pinch, anything more than that then you'll be fully recreating the foul-tasting spa waters of Bath or Viche!
A health tip: there is an old travellers saying that a “coke can save a life!” This is unlikely to be actually true, although it might often feel like it. However there is a nugget of truth in the matter... carbonated water has been shown to alleviate the symptoms of generic “indigestion” , whilst this is proven, the mechanism is unknown and the suggestion that it simply allows the patient to feel okay about letting out a great bog belch is as good a reason as any for how it works!
Just like nitrous oxide (when used as laughing gas), there is also a dental story to go with the soda syphon, although not such a happy one – the acidified water that is produced in a soda syphon has a negative effect on teeth due to its lower pH – and that is before you even take into account the extra sugar that some soft drink contain!