A CLOSER LOOK
How to recognize it
A colourless gas, CO₂ / INS 290, supplied for food processing and carbonation.
In the kitchen
Dissolves under pressure to give drinks their fizz.
Food-grade ingredient; a supplier blend may include other components. Appearance alone does not establish identity or purity.
Ask about this ingredient
这道菜里有二氧化碳（食品用）吗？
Does this dish contain Food-grade carbon dioxide?