2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz)
Carboxylic acids with additional oxygen function and their anhydrides, halides, peroxides and peroxyacids; their halogenated, sulphonated, nitrated or nitrosated derivatives. > Carboxylic acids with alcohol function but without other oxygen function, their anhydrides, halides, peroxides, peroxyacids and their derivatives: > 2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz) > 2,3,3,3-Tetrafluoropropene (HFO-1234yf), 1,3,3,3-tetrafluoropropene (HFO-1234ze) and (Z)-1,1,1,4,4,4-hexafluoro-2-butene (HFO-1336mzz)
Duty Rate (from China)
Products classified under Tariff item 2903.51.00
HFO-1234yf Automotive Refrigerant Charge
HFO-1234yf automotive refrigerant charge cylinders contain pure 2,3,3,3-tetrafluoropropene, a low-GWP unsaturated fluorinated acyclic hydrocarbon. This compound is specifically named in tariff item 2903.51.00, which covers HFO-1234yf, HFO-1234ze, and HFO-1336mzz. The pre-charged cylinders are designed for automotive A/C service and retrofitting, meeting the product description of the tariff item.
HFO-1234yf Chiller Retrofit Refrigerant
HFO-1234yf chiller retrofit refrigerant is pure 2,3,3,3-tetrafluoropropene supplied in 100lb dewars for commercial building chillers. This compound is explicitly listed in tariff item 2903.51.00 as HFO-1234yf. The product is intended as a drop-in replacement for R-134a in centrifugal chillers, but its chemical identity remains the named fluorinated hydrocarbon.
HFO-1234yf Electronic Grade Refrigerant
HFO-1234yf electronic grade refrigerant is ultra-high purity (>99.99%) 2,3,3,3-tetrafluoropropene for precision cooling in semiconductor manufacturing. The product is the pure named compound of tariff item 2903.51.00, despite its specialized application. The high purity does not affect classification as it remains the same chemical compound.
HFO-1234yf Mobile A/C Retrofit Kit Refrigerant
HFO-1234yf mobile A/C retrofit kit refrigerant consists of pure 2,3,3,3-tetrafluoropropene in 4oz service cans for fleet vehicle retrofitting. The product is the named compound of tariff item 2903.51.00. Although included in a retrofit kit, the refrigerant itself is the pure chemical and is classifiable under this item.
HFO-1234yf Refrigerant Gas
HFO-1234yf refrigerant gas is pure 2,3,3,3-tetrafluoropropene, a low-GWP unsaturated fluorinated derivative of acyclic hydrocarbons. This compound is explicitly named in tariff item 2903.51.00. The product is used in automotive air conditioning systems and is supplied as a gas in various container sizes.
HFO-1234yf Transport Refrigeration Refrigerant
HFO-1234yf transport refrigeration refrigerant is pure 2,3,3,3-tetrafluoropropene for refrigerated trucks and containers, replacing R-404A. The product is the named compound of tariff item 2903.51.00. Despite its application in transport refrigeration, the chemical identity determines classification.
HFO-1234yf VRF System Refrigerant
HFO-1234yf VRF system refrigerant is pure 2,3,3,3-tetrafluoropropene for variable refrigerant flow commercial HVAC systems. This compound is specifically listed in tariff item 2903.51.00. The product is supplied in 25lb cylinders for building management systems.
HFO-1234ze Appliance Foam Blowing Agent
HFO-1234ze appliance foam blowing agent is pure 1,3,3,3-tetrafluoropropene for refrigerator and freezer insulation foam. This compound is explicitly named in tariff item 2903.51.00. The product is supplied in ISO tank quantities for appliance manufacturers.
HFO-1234ze Continuous Insulation Board Blowing Agent
HFO-1234ze continuous insulation board blowing agent is pure 1,3,3,3-tetrafluoropropene for polyisocyanurate lamination board production. The product is the named compound of tariff item 2903.51.00. It is supplied in bulk tanker quantities for factory direct-fill systems.
HFO-1234ze Foam Blowing Agent
HFO-1234ze foam blowing agent is 1,3,3,3-tetrafluoropropene, an environmentally friendly blowing agent for polyurethane insulation. This compound is explicitly named in tariff item 2903.51.00. The product is classified as a pure unsaturated fluorinated acyclic hydrocarbon.
HFO-1234ze Spray Polyurethane Foam Precursor
HFO-1234ze spray polyurethane foam precursor is 1,3,3,3-tetrafluoropropene formulated as a B-component blowing agent. The product is the pure named compound of tariff item 2903.51.00. Although destined for chemical reaction in foam systems, it is imported as the pure chemical.
HFO-1336mzz Data Center Immersion Fluid
HFO-1336mzz data center immersion fluid is (Z)-1,1,1,4,4,4-hexafluoro-2-butene, a dielectric fluid for single-phase immersion cooling of servers. This compound is explicitly named in tariff item 2903.51.00. The product is pure and non-ozone depleting with a significantly lower GWP than traditional fluids.
HFO-1336mzz Organic Rankine Cycle Working Fluid
HFO-1336mzz Organic Rankine Cycle working fluid is (Z)-1,1,1,4,4,4-hexafluoro-2-butene for low-temperature power generation. This compound is specifically listed in tariff item 2903.51.00. The product is high purity for turbine applications in waste heat recovery.
HFO-1336mzz Single-Phase Server Cooling Fluid
HFO-1336mzz single-phase server cooling fluid is (Z)-1,1,1,4,4,4-hexafluoro-2-butene for immersion cooling of high-performance computing servers. The product is the named compound of tariff item 2903.51.00. It is supplied in 55-gallon drums for data center deployment.
HFO-1336mzz (Z) Heat Transfer Fluid
HFO-1336mzz (Z) heat transfer fluid is (Z)-1,1,1,4,4,4-hexafluoro-2-butene for immersion cooling systems. This compound is explicitly named in tariff item 2903.51.00. The product is a high-performance unsaturated fluorinated derivative used in electronics cooling.