Other specifications of packaging can be provided according to customer requirements

Dry Ice Solid Carbon Dioxide CO₂

Parameter Item	Standard Value	Remarks
Sublimation Temperature	-78.5℃	Under standard atmospheric pressure (101.325 kPa)
Solid Density	1.56 g/cm³ (1560 kg/m³)	At -78.5℃; high-density compressed dry ice can reach 1.59 g/cm³
Latent Heat of Sublimation (Cooling Capacity)	Approx. 636 kJ/kg	Cooling capacity per unit mass is roughly twice that of regular water ice
Relative Molecular Mass	44.01	—
Gas-to-Volume Ratio	1 kg of dry ice sublimates into approx. 0.542 m³ of CO₂ gas	Converted at normal temperature and pressure
Solubility	Soluble in water, hydrocarbons, and most organic solvents	Soluble in water to form carbonic acid, making the aqueous solution weakly acidic
Combustibility	Non-combustible, non-fire-supporting	No flash point; can be used for inert protection

Inquiry

Dry ice is solid carbon dioxide (CO₂). Under normal pressure, it has no liquid state and sublimates directly into gaseous CO₂, absorbing a massive amount of heat in the process to achieve a cooling effect. Because it sublimates without residue, has an extremely low temperature, and offers excellent bacteriostatic properties, it is widely used across multiple fields including food, cold chain logistics, industry, medical, cultural tourism, and more.

Specifications and Forms

Dry ice is divided into 4 main categories based on form, adapting to different usage scenarios:

Pellet Dry Ice (Cylindrical)

• • Φ3 mm Small Pellets: Large specific surface area, fast sublimation rate; mainly used for dry ice blast cleaning and rapid cooling in cold chain boxes.

• • Φ16 mm Large Pellets: Standard size Φ16 mm × 50 mm, moderate sublimation rate, highest versatility; widely used in cold chain transportation and food preservation.

• • • Characteristics: Excellent filling property, perfectly fits into the gaps of cooler boxes; this is the specification with the highest market circulation.

Block Dry Ice

• • Standard Brick Dimensions: 125 mm × 105 mm × 20~25 mm

• • Single Block Weight Specs: 250 g, 500 g, 1 kg, 2 kg, 5 kg, 10 kg

• • • Characteristics: Small specific surface area, slow sublimation, longer insulation time; suitable for long-duration static insulation and long-distance cold chain transport.

Slice/Sheet Dry Ice

• • Thickness Range: 2~5 mm

• • • Characteristics: Large contact area, rapid cooling speed; mainly used for fast cooling on food processing assembly lines and bacteriostatic treatment of materials.

Powder / Rice-shaped Dry Ice

• • Particle Size: < 1 mm

• • Characteristics: Extremely fast sublimation, massive instantaneous cooling capacity; mostly used for special experimental scenarios and rapid cooling of precision components.

Purity Grades and Quality Standards

Domestic (Chinese) dry ice is divided into two major grades based on purity and application, corresponding to different national standards:

Food Grade Dry Ice

• • Executive Standards: GB 1886.228-2016 Food Additive: Solid Carbon Dioxide, GB 10621-2022 Food Additive: Liquid Carbon Dioxide

• • Core Indicators:

     

    • • CO₂ Purity: ≥ 99.9% (Premium grade can reach 99.99%)

     

    • • Moisture: ≤ 13.3 ppm

     

    • • Oil, Sulfurous Acid, Nitrous Acid: Undetected

     

    • • Heavy Metals (Lead, Arsenic, Mercury): ≤ 0.1 mg/kg

     

    • Microorganisms: Pathogenic bacteria such as Salmonella and Staphylococcus aureus must not be detected

• • • Scope of Application: Can come into direct contact with food; used for fresh cold chains, catering plating, and food processing cooling.

Industrial Grade Dry Ice

• • Executive Standard: GB/T 38508-2020 Industrial Dry Ice

• • Core Indicators:

     

    • • CO₂ Purity: ≥ 99.5% (Standard industrial grade ≥ 99%)

     

    • Moisture: ≤ 0.048% (National standard upper limit ≤ 0.2%)

• • Requirements: No odor, no free oil

• • Scope of Application: Industrial cleaning, mold descaling, general cold chain transport, low-temperature testing; strictly prohibited from direct contact with food.

Performance Parameters

• • Sublimation Rate: Under normal temperature (25℃) and pressure, the loss in a standard EPS cooler box is roughly 2~5 kg/24h, influenced by environmental temperature, packaging insulation, and dry ice form.

• • Durability Rule: The higher the density and the larger the single-block volume, the slower the sublimation rate, leading to better economic efficiency in usage.

• Particle Uniformity: For high-quality pellet dry ice, the nominal particle size proportion is ≥ 95%, and the proportion of ultra-fine powder (<1 mm) is ≤ 0.5%.

Applications

Food and Catering

• • Core Scenarios: Freezing and preserving fresh meat/seafood, refrigerated delivery of ice cream/desserts, fog effects for catering dishes, beverage chilling, rapid cooling and bacteriostatic treatment on food processing lines.

• • Common Specs: Φ16 mm pellets, blocks, slices.

• • Purity Requirement: Food grade dry ice must be used.

• • • Industry Value: Sublimates with no liquid water residue, preventing ingredients from soaking and spoiling; the CO₂ atmosphere inhibits bacterial reproduction, extending shelf life.

Cold Chain Logistics

• • Core Scenarios: Cross-provincial transport for fresh e-commerce, aviation cold chain delivery, long-distance transfer of low-temperature ingredients, low-temperature transport of precision electronic components.

• • Common Specs: Φ16 mm pellets, 1kg/2kg blocks.

• • Purity Requirement: Food grade for food cold chains; industrial grade for ordinary industrial materials.

• • • Industry Value: Does not require external refrigeration equipment, can maintain a low-temperature environment of around -70℃; CO₂ gas inhibits fruit and vegetable respiration, reducing loss rates.

Industrial Cleaning (Dry Ice Blasting)

• • Core Scenarios: Descaling automotive part molds, cleaning rubber/plastic molds, dust removal from power equipment, decontaminating semiconductor packaging lines, cleaning printing press cylinder ink, removing coking from ships/heat exchangers.

• • Common Specs: Φ3 mm small pellets.

• • Purity Requirement: Industrial grade is sufficient; high-purity industrial grade is recommended for precision electronics.

• • • Industry Value: No media residue, does not wear the substrate, non-conductive, allows for online cleaning without halting operations, reducing downtime by over 80%; complies with environmental requirements and can replace chemical solvent cleaning.

Industrial Production and Manufacturing

• • Core Scenarios:

     

    • • Cold Assembly: Utilizing the principle of thermal expansion and contraction for low-temperature interference fitting of precision bearings and bushings.

     

    • • Chemical Cooling: Used as a low-temperature reaction cooling medium to control chemical reaction temperatures, replacing traditional Freon refrigerants.

     

    • Metal Cryogenic Treatment: Enhances the hardness and wear resistance of metal parts.

• • Common Specs: Blocks, pellets.

• • • Purity Requirement: Industrial grade.

Meteorology and Weather Modification

• • Core Scenarios: Artificial rain (snow) enhancement, artificial hail suppression; used as a cold cloud refrigerant.

• • Mechanism of Action: Sowing dry ice into supercooled clouds between 0℃ and -6℃ causes a sudden local temperature drop due to dry ice sublimation absorbing heat. This induces water vapor to form a massive amount of ice crystals, promoting precipitation; 1 gram of dry ice can generate tens of billions of ice crystal nuclei.

• • Common Specs: Pellets, small blocks.

• • • Purity Requirement: High-purity industrial grade.

Cultural Tourism and Stage Special Effects

• • Core Scenarios: Sea of clouds effect for stage performances, film and television special effects shooting, fog for wedding ceremonies, atmosphere creation in bars/immersive venues.

• • Common Specs: Block dry ice (used with fog machines).

• • • Purity Requirement: Both industrial and food grade are acceptable; food grade is recommended for enclosed indoor scenarios.

Other Applications

• • Fire Extinguishing: Some low-temperature fire extinguishers use dry ice as the extinguishing medium, suitable for precision instrument and archive fires.

• • Cosmetic Cryotherapy: Used in dermatology for the low-temperature cryotherapy treatment of acne and blemishes.

• • Storage Pest Control: Utilizing the inert CO₂ atmosphere to kill pests in grain and cultural relic storage.

Safe Handling and Storage

• • Cryogenic Protection: Anti-freeze gloves and safety goggles must be worn during operation; direct skin contact with dry ice is prohibited to prevent frostbite.

• • Ventilation Requirements: Operating in confined spaces must be equipped with CO₂ concentration monitoring and forced ventilation; a CO₂ concentration >1% in the air can cause discomfort, and >10% can cause asphyxiation.

• • Storage Requirements: Must be stored in dedicated insulated cooler boxes; fully sealed containers are strictly prohibited (expansion of sublimating gases can cause explosions). It is recommended to buy as needed at room temperature; long-term storage is not advised.

• Occupational Exposure Limits (GBZ 2.1-2019): Short-Term Exposure Limit (STEL) is 18,000 mg/m³ (approx. 9,000 ppm).

Purchasing and Selection