| Contact person: James Zhang
Email: james.zhang@dakenchem.com |
Frequently Asked Questions：
FAQ1: What are the core chemical parameters of 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate CAS 62439-35-4?
A1: Standard CAS No. 62439-35-4, IUPAC name trans-4-propylcyclohexanecarboxylic acid 4-cyanophenyl ester; molecular formula C₁₉H₂₅NO₂, molecular weight 299.41, EINECS 263-543-4. Appearance: colorless to pale yellow transparent liquid crystal monomer. Industrial standard purity ≥95.0% GC, electronic display grade ≥95.0 % GC, high trans-isomer content ≥95.0%. Density ~1.07 g/cm³, wide nematic liquid crystal phase range, typical ester cyclohexane liquid crystal raw material.
FAQ2: What solvents can CAS 62439-35-4 dissolve in? Is it compatible with other liquid crystal monomers?
A2: This liquid crystal monomer dissolves completely in common organic solvents including toluene, dichloromethane, ethyl acetate, ethanol and xylene; insoluble in water. Its saturated trans cyclohexane ester structure delivers excellent miscibility with biphenyl, cyano, fluorinated cyclohexyl liquid crystal monomers, no phase separation after high-temperature mixing, ideal for blending mixed LC formulations for display panels.
FAQ3: What end products and industries use CAS 62439-35-4 liquid crystal monomer?
A3: 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate CAS 62439-35-4 is a core intermediate for twisted nematic (TN) and super-twisted nematic (STN) liquid crystal mixtures. Main downstream applications: desktop office LCD monitors, automotive dashboard instrument screens, industrial digital controllers, medical device LCD displays, warehouse electronic price tags and university optoelectronic lab new material research. It is widely exported to India, Southeast Asia, Europe and North America LCD material manufacturers.
FAQ4: What electro-optical advantages does this ester liquid crystal monomer bring to LCD mixtures?
A4: The terminal cyano group provides strong positive dielectric anisotropy, significantly accelerating screen response speed and eliminating image ghosting. The long alkyl cyclohexane skeleton expands the stable nematic phase temperature window, improves low-temperature display performance and panel contrast ratio. Compared with benzene-based liquid crystal monomers, it has lower viscosity, better fluidity during high-temperature blending production.
FAQ5: What purity grades can your factory supply for CAS 62439-35-4? Can customized purification be supported?
A5: We supply two mainstream grades: industrial bulk grade ≥95.0% GC for general STN display mass production; high-purity electronic grade ≥95.0% GC for high-precision medical & automotive LCD modules. Custom recrystallization purification service is available to control moisture, free acid and single impurity below 100ppm. Each production batch is accompanied by full COA test report including GC purity, trans-isomer ratio, water content and foreign substance inspection data.
FAQ6: How about thermal stability and anti-oxidation performance of CAS 62439-35-4?
A6: This trans cyclohexane ester liquid crystal monomer maintains stable chemical structure below 185℃ without decomposition, discoloration or impurity generation during LC blending heating process. Saturated cyclohexane ring avoids thermal oxidation compared with unsaturated aromatic monomers, effectively extending the service life of finished liquid crystal mixtures and display screens under long-term high-temperature working conditions.
Application Cases：
Case 1: Low-Temperature Stabilizer for Wide-Range Nematic Mixtures
In automotive and outdoor LCDs, liquid crystal formulations must remain nematic down to –40 °C. 4-Cyanophenyl cis-4-propylcyclohexanecarboxylate acts as an outstanding eutectic melting point depressant. Adding 5–10% of this cis-isomer to a trans-dominated host suppresses cold crystallization completely, while minimally affecting the clearing point. This enables reliable display operation in extreme climates without sacrificing contrast or switching speed.
Case 2: Viscosity-Reducing Dopant for Fast-Response LC Devices
Devices like field-sequential-color displays and high-frame-rate VR headsets demand sub-millisecond liquid crystal response. The cis-isomer’s kinked molecular geometry disrupts close packing, drastically lowering rotational viscosity when blended into STN or VA mixtures. Our customers have demonstrated a 20–30% response time reduction by incorporating 4-Cyanophenyl cis-4-propylcyclohexanecarboxylate at 8–12% weight, enabling smoother motion rendering and reduced power consumption.
Case 3: Tunable Liquid Crystal Lenses and Diffractive Optics
Liquid crystal lenses and beam steerers rely on a uniform liquid crystal layer with low elastic constants. This cis-cyanoester is used to formulate high-birefringence, low-elastic-constant mixtures that facilitate smooth gradient-index profiles. Its excellent solubility prevents phase separation at low temperatures, a critical requirement for LC lens arrays used in 3D sensing, plenoptic cameras, and adaptive eyeglasses.
Case 4: Low-Melting Precursor for Reactive Mesogens (RMs)
For reactive mesogen synthesis, a common challenge is the high melting point of RM monomers, which causes premature crystallization during coating. Introducing the cis-cyclohexane core derived from CAS 62439-35-4 into an acrylate-RM structure can lower the RM’s melting point by 15–25 °C, enabling room-temperature spin-coating or inkjet printing. This is especially beneficial for producing optical retardation films and patterned retarders on plastic substrates that cannot withstand post-coating annealing.
Case 5: University & Optoelectronic R&D Lab Novel Liquid Crystal Material Synthesis (Lab Research Custom Trial)
Colleges, optoelectronic research institutes and new material CRO labs worldwide order trial batches (100g–5kg) of CAS 62439-35-4 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate for laboratory research. Scientists modify the ester linkage and alkyl chain structure based on this trans cyclohexane monomer to test electro-optical parameters of new calamitic liquid crystal compounds, developing tunable optical switches and light modulation devices. We provide complete supporting documents including COA, MSDS, TDS and accept customized recrystallization purification for lab ultra-high purity testing.
