CryoService supply Grade 3.0 Liquid Carbon Dioxide to the following specification:

 

Component	Concentration
Carbon Dioxide	>99.9% v/v min
Moisture	50 ppm v/v max (20 ppm w/w max)
Acidity	To pass JECFA or ISBT test
Ammonia	2.5 ppm v/v max
Oxygen	30 ppm v/v max
Oxides of Nitrogen (NO/NO2)	2.5 ppm v/v max each
Non-volatile Residue (particulates)	10 ppm w/w max
Non-volatile Organic Residue (oil and grease)	5 ppm w/w max
Phosphine***	<= 0.3 ppm v/v
Total Volatile Hydrocarbons (calculated as methane)	50 ppm v/v max of which 20 ppm v/v max non-methane hydrocarbons
Acetaldehyde	0.2 ppm v/v max
Benzene	0.02 ppm v/v max
Carbon Monoxide	10 ppm v/v max
Methanol	10 ppm v/v max
Hydrogen Cyanide*	< 0.5 ppm v/v
Total Sulphur (as S)**	0.1 ppm v/v max
Taste and Odour in Water	No foreign taste or odour

* Analysis necessary only for carbon dioxide from coal gasification.

** If the total sulphur content exceeds 0.1 ppm v/v as sulphur then the species must be determined separately and the following limits apply:-

        - Carbonyl Sulphide        0.1 ppm v/v max
        - Hydrogen Sulphide       0.1 ppm v/v max
        - Sulphur Dioxide             1.0 ppm v/v max

*** Analysis necessary  only for Carbon Dioxide from phosphate rock sources.

Typical applications include:

·  Brewing
·  Bottling
·  Incubators
·  Theatre special effects
·  pH control
·  Blanketing
·  Foundries
·  Modified Atmosphere Packing
·  Growth atmospheres