Carbon dioxide
CAS Number
124-38-9
EC Number
204-696-9
E Number
E290
What is Carbon dioxide?
Carbon dioxide (CAS 124-38-9), also supplied under the refrigerant designation R744 and approved food additive E-290, is one of the most broadly sourced industrial gases in global supply chains.
Where is Carbon dioxide used?
- Food and beverage: pH modifier, preservative, carbonation agent and refrigerant
- In soft drinks and beer, CO₂ is injected to deliver carbonation and mild acidity.
- Cold chain logistics and perishable food packaging: solid form and modified atmosphere gas to suppress microbial growth
- Oil and gas: injected into reservoirs for enhanced oil recovery
- Supercritical extraction of natural flavors, hops and caffeine
- Water treatment: neutralizes alkaline effluent and stabilizes pH before discharge or distribution
Commercial specifications
- Food-grade and beverage-grade specifications meeting FCC and E-290 purity standards
Other Names (Synonyms)
R744|E-290|CO₂|carbonic anhydride|carbonic acid gas|carbonic acid anhydride|[CO2]|carbon oxide|E290
What are the physical properties of Carbon dioxide?
Melting Point -79 °C (sublm)
Boiling Point -78.5 °C
Density 0.79787 g/cm³ (liquid) @ Temp: 50 °C; Press: 1.58 x 10⁵ Torr
Appearance Carbon dioxide is a colorless, odorless, noncombustible gas.
Color colorless
Odor Odorless
Form colorless gas
Water Solubility mL CO2/100mL H2O at 760mm: 171 (0°C), 88 (20°C), 36 (60°C) [MER06]
Vapor Pressure 56.5 atm ( 20 °C)
Refractive Index 1.0004
Log P 0.830 (est)
How is Carbon dioxide classified and handled safely? Learn More
Warning
GHS04· Compressed Gas GHS07· Irritant
Hazard Statements
H280 Contains gas under pressure; may explode if heated
H281 Contains refrigerated gas; may cause cryogenic burns or injury
H336 May cause drowsiness or dizziness
Precautionary Statements
P261 Avoid breathing dust/fume/gas/mist/vapours/spray.
P271 Use only outdoors or in a well-ventilated area.
P282 Wear cold insulating gloves and either face shield or eye protection.
P319 Get medical advice/attention if you feel unwell.
Which trade and regulatory codes apply to Carbon dioxide?
HS Code 28112100
UN Number 1013
ADR Class 2.2
Storage Class 2A - Gases