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Source: https://dryice.co.za/about-us/
Title: About Us - Delivering High-Quality Dry Ice Solutions
Type: about
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Learn More About Us Below 

Dry ice is the solid form of carbon dioxide (CO 2 ), which is colourless, odourless, non-flammable and slightly acidic. Solid CO 2 forms a gas at atmospheric pressure, without an intermediate liquid, through a process called sublimation. 

Dry ice can be manufactured from gases with a high concentration of carbon dioxide. Such gases can be a by-product of another process, such as producing ammonia from nitrogen and natural gas, or large-scale fermentation. Secondly, the carbon dioxide-rich gas is pressurised and refrigerated until it liquefies. Then, the pressure is reduced. 

When this occurs, some liquid carbon dioxide vaporises, causing a rapid decrease in temperature of the remaining liquid. As a result, the extreme cold causes the liquid to solidify into a snow-like consistency. Finally, the snow-like, solid carbon dioxide is compressed into either small pellets or larger blocks of dry ice. 

Dry ice is typically produced in two standard shapes: blocks and cylindrical pellets. Blocks are commonly used in transport because these sublimate relatively slowly due to a low ratio of surface area to volume. Pellets are available in 3mm and 16mm which are easily bagged. This shape is suitable for use on a small scale, for example grocery stores and laboratories. 

Warnings 

CO 2 gas is heavier than air and it can therefore accumulate in basements or other low-lying areas, which may cause suffocation. Keep vehicle windows open to ensure a draft, during the transportation of dry ice. 

Dry ice is much colder than water ice and may burn skin (similar to frostbite). Wear insulated gloves during handling and safety glasses or a face shield when cutting or chipping it. 

Keep out of reach of children. 

Do not ingest or swallow. 

Avoid inhaling CO 2 gas. Dry ice stored in a household storage freezer or refrigerator, is unlikely to produce CO 2 gas in sufficient quantities to cause a health risk. Therefore, dry ice may be safely used to refrigerate food in suitable containers. 

Advantages 

As a solid, the temperature of dry ice is -78.5 ° C, which is much lower than water ice. As solid CO 2 sublimates, large quantities of dry ice may be placed into shipping containers; there is no need to take into account any volume of liquid accumulating. 

Dry ice a very effective coolant compared to water ice, since it is colder and leaves no moisture as it changes state. It plays an important role in preserving foods during transportation, thus preventing bacterial growth. 

Scientists all over the world are investigating replacing HCFC gases (hydrochlorofluorocarbons) as refrigerant with dry ice, especially in developing countries. The use of dry ice as a refrigerant will slow down the harmful effects of HCFCs to the ozone layer and help to reduce global warming. 

Directions for use 

Dry ice is available in various forms and sizes. Order the appropriate product which is suitable for the intended application, as it can be difficult and dangerous to cut. 

Store dry ice in a container which allows for some ventilation, otherwise excessive levels of CO 2 gas can build up pressure inside the container and may pose a danger for explosion. 

We can deliver dry ice all over the country thanks to our network of retail depots in most provinces. Find a retail store near you on our Store locator page. 

We deliver to Cape Town, Johannesburg, Durban, Pretoria, Port Elizabeth, Soweto, Bloemfontein, East London, Sandton, Midrand, Middelburg, Witbank, Nelspruit, Upington, Kimberley, Rustenburg, Potchefstroom and Polokwane 

Blaster Products 

We have a range of dry ice blasters available for sale. We can also service and repair your blaster. 

View Blasters 

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About Us 

Dry Ice International has been recognised as the leader in dry ice manufacturing, distribution and dry ice blast cleaning in South Africa, as well as other parts of Africa since 1994. 

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Contact Us 

012 810 0500 

info@dryice.co.za 

259 Vonkprop Street, Silverton, Pretoria, Gauteng, South Africa 

24 Hour Emergency numbers 

Gauteng 

083 375 6627 

Kwazulu Natal 

031 569 6209 

Western Cape 

083 243 6483 

Eastern Cape 

083 243 6483 

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