R508B Refrigerant Specification
Technical Data Sheet(TDS) R-508B(Azeotropic HFC blend) CHF₃ / CF₃CF₃( 46/54) R508B, and.
1 Product Identification
| Item | Value |
|---|---|
| Product Name | R508B Refrigerant |
| Chemical Name | R-508B（Azeotropic HFC blend） |
| English Name | R-508B（Azeotropic HFC blend） |
| Molecular Formula | CHF₃ / CF₃CF₃( 46/54) |
| Molecular Weight | approx. 95.4 |
| CAS Registry Number | 75-46-7 / 76-16-4 |
| EINECS No. | 200-872-4 / 200-939-8 |
| UN Number | 3163 |
| Transport Hazard Class | Class 2.2, non-flammable gas |
| ASHRAE Safety Classification | A1(Low toxicity, non-flammable) |
| Reference Basis | Manufacturer data; the batch COA governs |
Reference Basis: Compiled from manufacturer data (safety classification per GB/T 7778, ASHRAE 34 / ISO 817)
2 Physical & Chemical Properties
R508B Typicaldata, system and,.
| Item | Typical Value |
|---|---|
| Appearance | Colorless, transparent liquefied gas |
| Odor | Faint, non-irritating |
| Boiling Point (101.3 kPa) | approx. -87.4 ℃ |
| Temperature glide | ≈ 0 ℃(Azeotropic) |
| Critical Temperature | approx. 21 ℃ |
| Critical Pressure | approx. 4.13 MPa |
| Vapor Pressure (25 C, absolute) | approx. 3.3 MPa |
| Liquid Density(-40 ℃) | approx. 1250 kg/m³ |
| Saturated Vapor Density(25 ℃) | approx. 135 kg/m³ |
| Latent Heat of Vaporization (at boiling point) | approx. 155 kJ/kg |
| Liquid Specific Heat(25 ℃) | approx. 1.30 kJ/(kg K) |
| Vapor Specific Heat(25 ℃, 101.3 kPa) | approx. 0.75 kJ/(kg K) |
| Liquid Thermal Conductivity(25 ℃) | approx. 0.090 W/(m K) |
| Vapor Thermal Conductivity(25 ℃) | approx. 0.0155 W/(m K) |
| Liquid Viscosity(25 ℃) | approx. 0.09 mPa s |
| Vapor Viscosity(25 ℃) | approx. 0.0160 mPa s |
| Surface Tension(25 ℃) | approx. 3.5 mN/m |
| Water Solubility(25 ℃) | Slightly soluble |
| Auto-Ignition Temperature | Not applicable (non-flammable) |
| Flammability Limits in Air (vol.%) | None (non-flammable) |
| Typical evaporating temperature | -80 ℃ ~ -100 ℃ |
| OEL (8 h TWA) | 1000 ppm |
| Ozone Depletion Potential (ODP) | 0 |
| GWP (100 yr, IPCC AR5) | 13396 |
| Atmospheric Lifetime | approx. 1000 yearsand above( R116 ) |
3 Quality Specifications & Test Methods
R508B Parameter, Batch COA.
| Item | Parameter | Test Method |
|---|---|---|
| Appearance | Colourless and clear, free of suspended matter and mechanical impurities | Visual inspection |
| Purity | ≥ 99.90 % | Gas chromatography GC-FID |
| Composition tolerance | R23 ±1.0 %, R116 ±1.0 % | Gas chromatography GC-FID |
| Moisture | ≤ 10 ppm | Karl Fischer coulometric method |
| Acidity( HF ) | ≤ 0.1 ppm | Alkali absorption - potentiometric titration |
| Evaporation Residue | ≤ 0.01 % | Gravimetric method |
| Non-Condensable Gas(, 25 ℃) | ≤ 1.5 % | Gas chromatography |
| (Cl⁻) | Negative (pass) | Silver nitrate turbidimetry |
4 Comparison with Common Refrigerants
| Comparison Item | R508B(this product) | R23 | R14 |
|---|---|---|---|
| Composition | R23/R116 46/54 Azeotropic | Single compound CHF₃ | Single compound CF₄ |
| Boiling point | approx. -87.4 ℃ | -82.1 ℃ | -127.8 ℃ |
| Typical evaporating temperature | -80 ℃ ~ -100 ℃ | -70 ℃ ~ -85 ℃ | 120 ℃ and below |
| ODP | 0 | 0 | 0 |
| GWP(100 years, AR5) | 13396 | 14800 | 7390 |
| ASHRAE Safety Classification | A1 | A1 | A1 |
| Temperature glide | ≈ 0 ℃(Azeotropic) | 0 ℃ | 0 ℃ |
| Compatible lubricant | POE(Low temperature) | POE(Low temperature) | POE(Low temperature) |
| system | Low stage of cascade systems | Low stage of cascade systems | cascade/cascadeLow temperature |
| Current selection | Ultra-low temperature cascadesystem refrigerant | cryogenic and Low temperaturetesting | Low temperaturecryogenic |
5 Packaging Specifications
| Package Type | Specification | Filling Ratio | Valve Connection | Application |
|---|---|---|---|---|
| disposable cylinder | 10 kg(customizable 5 kg) | ≤ 0.70 kg/L | W21.8-14(customizable CGA / DIN) | Servicing and small-batch use |
| steel cylinder | 40 kg(customizable 100 kg) | ≤ 0.70 kg/L | W21.8-14 | equipmentbulk supply |
| cylinder pallet | Made to order | Per cylinder | W21.8-14 | Itemdistribution |
| ISO ISO tank | Made to order | per ISO tank | ISO tankconnection | and Transport |
Filling Ratioper"", steel cylinderper.
6 Applications
- pharmaceuticalchemicalcryogenic and freeze drying
- Low temperaturetest chamber and environmental test equipment
- gas liquefaction and Low temperature
- cascade Ultra-low temperaturesystem Low temperature
Equipment Compatibility & Charging Advice
- R508B cascade Ultra-low temperaturesystem Low temperature, High temperature R404A, R507 or R134a, per cascadecondensing.
- GWP refrigerant(13396), cryogenic, recovery and tightness, emissions.
- Low temperature POE, per Ultra-low temperaturecompressor and.
- system and, Low temperature and.
- Low temperature, system and,.
7 Storage & Transport
- Storage,, ventilation, 40 ℃, ignition source, heat source and.
- steel cylinder, and,,, and.
- R508B A1 Non-flammable refrigerant, Vapour, Spillagelow-lying areasoxygen, ventilation.
- and oxygen, and (,, )Flammable.
- and, Low 0.05 MPa.
- Transportper Danger 2.2 class, and, steel cylinder.
8 Safety & Handling
- Asphyxiation riskVapour, Spillagelow-lying areas, and equipmentoxygen, ventilationoxygen(Low 19.5 %).
- Overpressure riskR508B Critical TemperatureLow(approx. 21 ℃), steel cylinder,, or, system and.
- SpillageSpillageventilation,;;leak detection or leak detection, open flamesleak detection.
- Thermal decomposition riskopen flames or High temperature, recoveryventilation.
- frostbite ProtectionLiquefied gasfrostbite, Evaporating temperatureLow, and;frostbite 40 ℃.
- Inhalation andVapourasphyxiation and, fresh airoxygen;Eye contact 15.
9 Quality Assurance & Shipping Documents
- Batch COA, Purity( or ), Moisture, Acidity and Evaporation Residue.
- Moisture, and Low temperature.
- 12 months, Batch, No. and.
- perthird-party test report(SGS / ), SDS Description REACH, RoHS.
10 Frequently Asked Questions
80 ℃ and below R23 R508B？
R23 -70 ℃ ~ -85 ℃, R508B Azeotropic Mixture -80 ℃ ~ -100 ℃, Low temperature. -120 ℃ and below Low temperature, R14 or cascade. Evaporating temperature, and compressor.
R508B GWP 13396 ？
. R508B GWP refrigerant, "Kigali Amendment"phase-down, cryogenic, recovery, and Spillage, Itemlow-GWP Ultra-low temperature Alternatives.
R508B systemWhy is？
R508B Critical Temperatureapprox. 21 ℃, refrigerant,. Ultra-low temperaturesystem( or ) and, perLow temperature refrigerant.
R508B Shelf life?
steel cylinder, Storage, R508B Shelf Life 24 months., steel cylinder and.
Disclaimer
Specificationdata Typical,;Parameter Batch COA. and, or or, equipment and Regulations.
Specificationdata Typical,;Parameter Batch COA. and, or or, equipment and Regulations.
| Reviewed by: | Approved by: | Hubei Zhongjin Fluorine Chemical Co., Ltd.
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