executive standards：gb1886.228-2016
packaging：low temperature storage tank and tanker
storage：tank cylinders for storge and transportation of liquid carbon dioxide should be pressure vessels and conform to the requirement of
main usage：mainly used for carbonated beverages, and can also be used for food processing, food preservation and storage, etc.
item | unit | index |
color | / | colorless in gas state |
odor | / | slightly acid and no other odor |
taste | / | tasteless |
carbon dioxide | % | ≥99.9 |
water | μl/l | ≤20 |
oxygen | μl/l | ≤30 |
oil | mg/kg | ≤5 |
residue on evaporation | mg/kg | ≤10 |
nitric oxide | μl/l | ≤2.5 |
nitric dioxide | μl/l | ≤2.5 |
sulfur dioxide | μl/l | ≤1.0 |
total sulfur (excluding sulfur dioxide, as sulfur) | μl/l | ≤0.1 |
total hydrocarbon (as methane) | μl/l | ≤50（not more than 20 for non-methane） |
benzene | μl/l | ≤0.02 |
methanol | μl/l | ≤10 |
acetaldehyde | μl/l | ≤0.2 |
chloroethylene | μl/l | ≤0.3 |
ammonia | μl/l | ≤2.5 |