| HS Code | 755049 |
| Product Name | Cooling Liquid Products RH-PCT-10 |
| Product Code | RH-PCT-10 |
| Manufacturer | Cooling Liquid Products |
| Product Type | Cooling liquid |
| Physical State | Liquid |
| Recommended Application | Cooling systems |
| Storage Conditions | Store in a closed original container in a cool, dry, well-ventilated area |
| Handling Precautions | Follow the manufacturer safety data sheet |
As an accredited Cooling Liquid Products RH-PCT-10 factory, we enforce strict quality protocols—every batch undergoes rigorous testing to ensure consistent efficacy and safety standards.
| Packing | Cooling Liquid Products RH-PCT-10 is packaged in a securely sealed, chemical-resistant container, supplied in a 10 L quantity. |
| Container Loading (20′ FCL) | Loading Cooling Liquid Products RH-PCT-10 into a 20′ FCL container, with packages securely stowed for safe and compliant transport. |
| Shipping | Cooling Liquid Products RH-PCT-10 is supplied in sealed, properly labeled containers and packaged to prevent leakage during transport. Ship in accordance with the product SDS and applicable regulations; keep containers upright, secured, and protected from freezing, extreme heat, and physical damage. |
| Storage | Store in a cool, dry, well-ventilated area away from direct sunlight, heat, ignition sources, and incompatible chemicals. Keep containers tightly closed, properly labeled, and upright on a stable, impermeable surface with secondary containment. Protect from freezing or excessive temperatures as specified in the SDS. Ensure adequate ventilation and spill-response materials are available, in accordance with local regulations and manufacturer’s instructions. |
| Shelf Life | Store in the original, unopened container under recommended conditions; shelf life is typically 24 months from the date of manufacture. |
In single-phase immersion deployments for high-density compute, the fluid is charged into 21-inch rack baths operating at a supply temperature of 35 °C and a return temperature of 45 °C. Cooling Liquid Products RH-PCT-10 is filtered through 1 µm absolute-rated polypropylene bag filters before entering the distribution manifold, because particles above 5 µm accumulate in micro-channel cold plates with fin pitches below 0.3 mm. Thermal conductivity is measured per ASTM D7896 transient hot wire method at 40 °C; a shift below 0.14 W/m·K requires a mass flow increase of more than 18 % in a 30 kW tank, which raises pump energy by a cubic function of flow velocity. Specific heat capacity is checked per ASTM E1269, and dielectric strength is verified according to IEC 60156 with 2.5 mm gap electrodes before energisation; the loop remains locked out until breakdown voltage exceeds 35 kV. Water ingress is controlled below 200 ppm by Karl Fischer titration because moisture above 500 ppm reduces volume resistivity below 1 GΩ·m and creates a leakage path between adjacent printed circuit board layers. Production-scale field reports show that polyurethane cable jackets and acrylic light-guide polymers can embrittle after prolonged contact with undiluted cooling liquid at 60 °C, so polymer components are screened by ISO 175 immersion before tank-level deployment. The fluid return header is maintained under a slight nitrogen blanket at 0.2 bar gauge to limit oxidation and particulate ingress.
Battery cold plate loops for lithium-ion modules require an inhibitor package that does not produce conductive ionic species. RH-PCT-10 is blended at 30 vol% with ASTM D1193 Type IV deionised water, and the circulating liquid at 25 °C is held below 5 µS/cm per ASTM D1125. Higher conductivity accelerates galvanic corrosion between 3003 aluminium cold plates and nickel-plated copper busbars. Coupon screening follows ASTM D1384 at 88 °C for 336 h; many pack integrators reject fluids when cast aluminium mass loss exceeds 10 mg or copper mass loss exceeds 5 mg. Flow velocity in cold plate channels is held between 1.0 m/s and 2.5 m/s; below 1.0 m/s laminar boundary layers reduce heat transfer by more than 30 % at a heat flux of 0.4 W/cm². At -25 °C, kinematic viscosity must stay below 30 cSt per ASTM D445 to prevent pump cavitation in serpentine channels with hydraulic diameters of 4 mm. The loop is sealed with EPDM and hydrogenated nitrile seals; polyacrylate seals are disqualified after volume swell above 15 % in ASTM D471 at 100 °C. Conventional OAT coolants using silicate or borate buffers are not permitted because they raise low-voltage leakage current above 100 µA during battery management system insulation monitoring.
| Test method | Parameter | Unit | Acceptance target |
|---|---|---|---|
| ASTM D7896 | Thermal conductivity | W/m·K | Report at 40 °C |
| ASTM E1269 | Specific heat capacity | J/g·K | Report at 40 °C |
| ASTM D1125 | Electrical conductivity | µS/cm | ≤ 5 at 25 °C |
| ASTM D1384 | Glassware corrosion mass loss | mg/coupon | Al ≤ 10, Cu ≤ 5 |
| ASTM D445 | Kinematic viscosity | cSt | ≤ 30 at -25 °C |
| IEC 60156 | Dielectric breakdown voltage | kV | ≥ 35 at 2.5 mm |
| ISO 175 | Polymer mass change | % | ≤ 3 |
Injection mold temperature control circuits operate with drilled water lines of 8 mm to 12 mm diameter. A diluted RH-PCT-10 stream at 20 vol% in reverse-osmosis water at 20 °C must maintain a kinematic viscosity below 2.0 cSt per ASTM D445; otherwise Reynolds numbers fall below 10 000 at the pressure drops available from standard mold temperature controllers. Supply temperature is held at 12 °C to 18 °C; lower settings cause condensation on cavity surfaces and surface defects in hygroscopic resins. For high-gloss polycarbonate tooling, mold temperature variation across the B-plate is kept within ±1 °C by balancing flow in parallel circuits with turbulent flow. Organic inhibitors are selected for low foaming tendency because entrained air in return manifolds produces hot spots at the end of the cavity.
In IGBT-based traction inverters and wind turbine converter cabinets, the module baseplate is bolted to a liquid-cooled cold plate with M5 fasteners at 3 N·m to 5 N·m. Coolant inlet temperature is controlled at 55 °C to 65 °C, and continuous virtual junction temperature is capped at 125 °C even though module datasheets permit 150 °C. RH-PCT-10 is circulated through nickel-brazed copper cold plates at a flow rate calculated to keep thermal resistance of the cold plate below 0.12 K/W per module. The closed loop is nitrogen-blanketed at 1.5 bar to 2.0 bar gauge, and dissolved oxygen is maintained below 20 ppb to limit corrosion of copper brazed joints. Electrical conductivity is kept below 10 µS/cm per ASTM D1125 because the cold plate sits near high-voltage DC busbars. Aluminium cold plates are passivated with a conversion coating before charging; uncoated 6061-T6 surfaces exhibit pitting when chloride contamination exceeds 5 ppm in the bulk coolant.
Chemical production lines that run exothermic polymerisations frequently return jacket fluid at 130 °C to 145 °C. Under these conditions RH-PCT-10 is evaluated for thermal stability by ASTM D6743 at 150 °C for 500 h; a total acid number increase above 0.2 mg KOH/g indicates oxidation or thermal cracking. The system is designed for a fouling factor budget of 0.00018 m²·K/W, and the heat exchanger is cleaned when pressure drop across the jacket exceeds 0.7 bar. Low-boiling degradation products are monitored by flash point testing per ASTM D93; a closed-cup flash point drop below 170 °C triggers partial draindown and replacement. Copper and steel coupon monitoring follows DIN 51522-2 with corrosion rates below 0.01 mm/year. Seal selection is limited to polytetrafluoroethylene and flexible graphite; EPDM is not used above 140 °C because thermal ageing accelerates compression set.
| Material | Test method | Exposure condition | Acceptance criterion |
|---|---|---|---|
| Polytetrafluoroethylene | ISO 175 | 168 h at 120 °C | Mass change ≤ 1 % |
| Flexible graphite | ASTM D471 | 168 h at 120 °C | Mass change ≤ 2 % |
| EPDM | ASTM D471 | 168 h at 100 °C | Volume swell ≤ 10 % |
| Hydrogenated nitrile | ASTM D471 | 168 h at 100 °C | Volume swell ≤ 8 % |
| Polyacrylate | ASTM D471 | 168 h at 100 °C | Disqualify if swell > 15 % |
In freeze-dryer shelf circuits, silicone oil is often used as a secondary heat transfer fluid. When RH-PCT-10 is evaluated as a replacement, the critical acceptance parameter is kinematic viscosity at -40 °C; values above 50 cSt per ASTM D445 cause excessive pressure drop in shelf channels with 6 mm diameter and reduce temperature ramp uniformity below the required ±1 °C across the shelf surface. The fluid is heated and cooled through a circulating skid with silicon carbide mechanical seals rated for 200 kPa suction pressure. Published ageing data for lyophilizer shelf fluids cycled between -60 °C and 70 °C is limited; qualification trials therefore use 200 thermal cycles with a minimum of 5 % weekly inhibitor depletion measurement. The circuit is not a direct product-contact surface, but leak detectors are set to trigger at 2 µS/cm in the heat exchanger condensate line to ensure separation integrity from the cleanroom steam system. Copper and brass components in older lyophilizer skids are incompatible with chloride-containing fluids; chloride concentration is kept below 10 ppm by ion chromatography.
Competitive Cooling Liquid Products RH-PCT-10 prices that fit your budget—flexible terms and customized quotes for every order.
For samples, pricing, or more information, please contact us at +8618005193850 or mail to sales8@bouling-chem.com.
We will respond to you as soon as possible.
Tel: +8618005193850
Email: sales8@bouling-chem.com
Flexible payment, competitive price, premium service - Inquire now!
Where heat flux density in a microchannel copper cold plate exceeds 60 W/cm² and bulk fluid electrical conductivity must remain below 2.0 µS/cm, Cooling Liquid Products RH-PCT-10 is specified as a pre-mixed polyol-based coolant with a non-amine, non-silicate inhibitor package. The model RH-PCT-10 designates a low-conductivity, prediluted heat transfer fluid intended for closed recirculating liquid loops. It is not an automotive antifreeze concentrate, and dilution with site water is not part of the intended use. The product is supplied ready to charge into recirculating chillers, direct-to-chip cold plates, and sealed electronic thermal management systems. The fluid is a clear, pale yellow liquid packaged in 20 L and 200 L closed-head polyethylene drums purged with dry nitrogen. Typical physical property data for RH-PCT-10 are determined under standard methods. Density at 20 °C is 1.04 g/cm³ when measured according to ASTM D4052-22. Kinematic viscosity at 25 °C is 2.9 mm²/s and at -20 °C is 28 mm²/s when measured according to ASTM D445-21. Freezing point is -28 °C under ASTM D1177-17. Boiling point at 101.3 kPa is 106 °C under ASTM D1120-20. Specific heat capacity at 25 °C is 3.6 kJ/(kg·K) under ASTM E1269-11(2018), and thermal conductivity at 25 °C is 0.41 W/(m·K) under ASTM D7896-19. Initial pH is 8.2 under ASTM D1287-11(2020), reserve alkalinity is 12.0 mL 0.1 N HCl under ASTM D1121-11(2020), and electrical conductivity at 25 °C is 1.8 µS/cm under ASTM D1125-23.
| Property | RH-PCT-10 | Deionized water | Inhibited ethylene glycol 50% | Test method |
|---|---|---|---|---|
| Kinematic viscosity at 25 °C | 2.9 mm²/s | 0.89 mm²/s | 2.4 mm²/s | ASTM D445-21 |
| Density at 20 °C | 1.04 g/cm³ | 0.998 g/cm³ | 1.07 g/cm³ | ASTM D4052-22 |
| Thermal conductivity at 25 °C | 0.41 W/(m·K) | 0.61 W/(m·K) | 0.40 W/(m·K) | ASTM D7896-19 |
| Specific heat capacity at 25 °C | 3.6 kJ/(kg·K) | 4.18 kJ/(kg·K) | 3.4 kJ/(kg·K) | ASTM E1269-11(2018) |
| Electrical conductivity at 25 °C | 1.8 µS/cm | <0.1 µS/cm | 550 µS/cm | ASTM D1125-23 |
| Freezing point | -28 °C | 0 °C | -36 °C | ASTM D1177-17 |
| Boiling point at 101.3 kPa | 106 °C | 100 °C | 108 °C | ASTM D1120-20 |
| pH | 8.2 | 7.0 | 8.5 | ASTM D1287-11(2020) |
The corrosion inhibition package in RH-PCT-10 is designed for copper, brass, 316L stainless steel, and aluminum alloys in closed loops. Reserve alkalinity, not pH alone, is used as the buffering indicator because a small pH drift can occur before inhibitor depletion leads to measurable electrochemical activity. In ASTM D1384-18 glassware corrosion screening at 88 °C for 336 h, the manufacturer’s technical bulletin reports coupon mass losses below 5 mg for copper and brass and below 10 mg for cast aluminum; published data for this specific configuration is limited outside that document. The limiting boundary in mixed-metal loops is the generation of dissolved copper ions when pH falls below 7.5. Dissolved copper deposits on zinc or magnesium surfaces by galvanic replacement and accelerates pitting. Zinc anodes, magnesium alloys, and hot-dip galvanized steel are therefore not recommended. Flow velocity is a second critical threshold. In microchannel cold plates with hydraulic diameters below 1.0 mm, the recommended bulk velocity is 1.0 m/s to 2.5 m/s. Below 1.0 m/s, stagnant zones permit inhibitor depletion and particulate settling. Above 2.5 m/s, erosion corrosion on copper fin tips becomes measurable in long-duration life testing. Normal service filtration is 10 µm; first-fill filtration is 1 µm.
Production-scale blending records from 1,000 L jacketed 316L vessels equipped with bottom-mounted low-shear impellers show that the inhibitor package is added at 35 °C to avoid localized high-concentration zones. Filtration through 1 µm polypropylene cartridges is completed before drum filling. Inline conductivity cells with platinum black electrodes measure 1.8 µS/cm ± 0.2 µS/cm across release lots. Lots exceeding 2.0 µS/cm are diverted to rework. Elastomer and polymer compatibility data have been generated by immersion testing based on ASTM D471-16a at 60 °C for 168 h. Peroxide-cured EPDM, nitrile rubber, polycarbonate, polypropylene, PEX, and polysulfone show volume swell below 2% and hardness change below 5 Shore A according to ISO 48-4:2018. Natural rubber and unplasticized PVC are not recommended because plasticizer migration and swelling exceed the acceptance criterion. The non-amine inhibitor package is specifically selected to avoid amine-induced attack on polycarbonate manifolds; amine-based corrosion inhibitors can generate stress-cracking agents at elevated temperature.
Field changeover in a recirculating chiller requires that the previous inhibited ethylene glycol charge be completely removed. The loop is drained, flushed with low-conductivity deionized water, and recirculated until rinse water conductivity remains below 5.0 µS/cm and total organic carbon is stable. Residual ethylene glycol above 10% is not acceptable because it shifts the freezing point, alters the toxicity profile, and can cause antagonistic inhibitor interactions with the non-amine package. Residual glycol concentration is verified by refractive index using a handheld refractometer calibrated against ASTM D6130-11 or by gas chromatography where regulatory records require an identity check. Compared with a typical 50% ethylene glycol automotive coolant, RH-PCT-10 has a lower initial electrical conductivity because it is not formulated with silicate, borate, nitrite, or molybdate salts. Automotive coolant conductivity commonly exceeds 500 µS/cm; RH-PCT-10 is released below 2.0 µS/cm. The same formulation change reduces the risk of silicate gelation in hard-water loops, but it also means that the product does not provide the same high-temperature aluminum protection as a heavy silicate automotive coolant in an open-system engine. Use is therefore restricted to closed loops below 90 °C at atmospheric pressure. In nitrogen-blanketed systems, short excursions to 100 °C are tolerated only with increased reserve alkalinity monitoring.
Replacement of deionized water with RH-PCT-10 reduces thermal conductivity from 0.61 W/(m·K) to 0.41 W/(m·K) and reduces specific heat capacity from 4.18 kJ/(kg·K) to 3.6 kJ/(kg·K). This creates a thermal derate of approximately 13% to 18% in low-flow cold plates unless the pump curve is adjusted. The advantage is freeze protection to -28 °C and a stable corrosion inhibitor reserve. In electronics cooling applications where dielectric fluids are used for direct immersion, RH-PCT-10 is not a substitute because its conductivity is not sufficiently low for intentionally leak-prone energized connections. Dielectric fluorocarbons with volume resistivity above 10^9 Ω·cm are required for direct immersion. RH-PCT-10 is intended for closed, indirect-contact liquid cooling.
In recirculating chillers with centrifugal pumps delivering 20 L/min to 40 L/min, the fluid is charged through a 1 µm filter. Loop volume is calculated from the heat load; for a thermal load of 5 kW, a coolant flow rate of 10 L/min with a 10 °C ΔT is typical. The pump head must be verified because the viscosity of 2.9 mm²/s at 25 °C is higher than water. At -20 °C, viscosity increases to 28 mm²/s, which can shift the operating point of fixed-speed centrifugal pumps. In air-cooled recirculating chillers, the maximum fluid temperature at the reservoir should not exceed 60 °C to limit oxidative byproduct formation. Above 60 °C, a nitrogen blanket or sealed expansion tank is required. Initial charging should be performed at ambient temperature with the loop vented. Storage stability in closed containers is 24 months at 5 °C to 35 °C. Drums should be kept sealed because atmospheric CO₂ absorption increases conductivity by 0.3 µS/cm to 0.6 µS/cm over 24 h of open head-space exposure. Regulatory compliance status according to the manufacturer’s technical bulletin includes EU REACH registration for propylene glycol and inhibitor components, and RoHS Directive 2011/65/EU Annex II substances are below the maximum concentration values by weight in homogeneous material. The product is not intended for incidental food contact under 21 CFR 178.3570.
Dedicated to excellence in chemistry — serving industries worldwide with integrity and innovation.
