| CAS NO.62439-34-3 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate | |
| Product Name | 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate |
| Synonyms | (4-cyanophenyl)4-butylcyclohexane-1-carboxylate;4α-Butylcyclohexane-1β-carboxylicacid4-cyanophenylester;4β-Butyl-1α-cyclohexanecarboxylicaChemicalbookcidp-cyanophenylester;4β-Butylcyclohexane-1α-carboxylicacid4-cyanophenylester;Cyclohexanecarboxylicacid,4-butyl-,4-cyanophenylester,trans- |
| CAS NO. | 62439-34-3 |
| Appearance | White solid |
| Purity | 95% min |
| MF | C18H23NO2 |
| MW | 285.38 |
| Storage | Preserve in a well-closed container and keep in cool, dry place, avoid light. |
| Package | In fluoride bottle/ Fluoride drums/iron drums/plastic drums/IBC Tank ,etc. |
| Shipment method | By Sea, Air, Courier door to door, etc. |
| Loading Port | China any port, Beijing, Shanghai, Hong Kong etc. |
| Application |
1.Liquid Crystal Core MonomerIt is a high-purity positive dielectric ester liquid crystal monomer with trans cyclohexane rigid structure. It can effectively raise the clearing point and adjust dielectric anisotropy of mixed liquid crystal formulations, reduce viscosity and improve the response speed of TN & STN liquid crystal display mixtures. 2.Intermediate for Mixed Liquid Crystal Formulation： Widely used as key blending raw material for low-power display liquid crystal. It optimizes the phase transition temperature range, suppresses crystallization at low temperature, and stabilizes the electro-optical performance of liquid crystal mixtures applied in instrument panels, digital screens and small-size LCD modules. 3.Organic Synthetic Intermediate for Mesogenic MaterialsServes as an important fine chemical intermediate for synthesizing high-performance ester-type reactive mesogens (RM). Its cyanophenyl ester structure provides molecular ordering, which is applied to develop optical retardation film materials and anisotropic photopolymer compositions. |
| Contact | Contact person: James Zhang
Email: james.zhang@dakenchem.com |
Frequently Asked Questions：
FAQ 1: What is CAS 62439-34-3? (Basic Identity)
A1: CAS 62439-34-3 refers to 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate (also named trans-4-propylcyclohexanecarboxylic acid 4-cyanophenyl ester). This compound is a fundamental building block in the liquid crystal industry, prized for its trans-cyclohexane structure and terminal cyano group. It appears as a white to off-white crystalline solid with a typical purity ≥99.5% (HPLC). Our product is manufactured under ton-scale capacity, ensuring consistent quality and stable supply for global customers.
FAQ 2:What is the appearance and typical purity of this product? (Basic Properties)
A2: 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate presents as a white or slightly off-white crystalline powder under standard conditions. High-purity material (>99.5% area by HPLC) shows minimal yellowing; any deviation from brilliant white may indicate oxidation or lower purity. We supply this liquid crystal intermediate with strict quality control, including a certificate of analysis (COA) for each batch, covering purity, melting point, moisture, and optical anisotropy-related parameters.
FAQ 3: What are the primary applications of 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate? (Applications)
A3: This cyanophenyl ester is a critical liquid crystal intermediate for manufacturing advanced thermotropic liquid crystal monomers. It is commonly incorporated into nematic liquid crystal mixtures for TFT-LCD, TN, STN, and VA displays. Beyond display applications, it is also utilized to produce reactive mesogens (RMs), which are cross-linkable liquid crystal materials applied in retardation films, polarizers, security coatings, and organic electronics. Its high polarity from the cyano group strongly influences dielectric anisotropy, a crucial parameter for formulation.
FAQ 4: What are the key physical properties (e.g., melting point, solubility)? (Performance)
A4: The melting point of high-purity 4-Cyanophenyl trans-4-propylcyclohexanecarboxylate is around 66–70 °C. It is freely soluble in chlorinated solvents, THF, ethyl acetate, and aromatic hydrocarbons, but nearly insoluble in water. Thermogravimetric analysis demonstrates its stability far above the melt, enabling safe processing in typical liquid crystal formulation conditions. These performance characteristics make it a forgiving intermediate for synthesis at various scales.
FAQ5: What electro-optical advantages does CAS 62439-33-2 bring to liquid crystal mixtures?
A5: The terminal cyano group provides strong dielectric anisotropy, fast response speed, stable mesomorphic phase within wide temperature range. It improves contrast ratio and low-temperature stability of LCD panels, reducing image lag under extreme operating temperatures.
Application Cases：
Case 1：High-Δε Component in TFT-LCD Mixtures
- Cyanophenyl trans-4-propylcyclohexanecarboxylate is a crucial polar dopant in nematic liquid crystal mixtures for TFT-LCD panels. Its terminal cyano group delivers strong positive dielectric anisotropy (Δε > +15), enabling fast response times and low threshold voltages in TN, VA, and IPS/FFS display modes. Blended at 5–15 wt%, it sharply improves the mixture’s electro-optical performance.
Case 2：Rigid Core for Polymerizable Reactive Mesogens (RMs)
Derivatizing this cyanophenyl ester with acrylate or methacrylate groups yields highly ordered reactive mesogens. These RMs are spin-coated and photo-patterned to form anisotropic optical films, including quarter-wave plates, patterned retarders, and cholesteric layers used in OLED circular polarizers and 3D displays. The trans-cyclohexane ring ensures mesophase stability and low birefringence dispersion.
Case 3：Intermediate for Liquid Crystal Polymers (LCPs)
Incorporating this monomer into side-chain liquid crystal polymers allows the design of thermo-responsive optical materials. These LCPs find use in smart windows, switchable privacy films, and optical sensors. The compound’s cyano group provides polar anchoring, enabling oriented polymer networks under electric or magnetic fields.
Case 4：Building Block for Organic Electronics & OFETs
The rigid rod-like structure of 4-cyanophenyl trans-4-propylcyclohexanecarboxylate makes it a valuable synthon for organic semiconductors. It can be integrated into p-type or n-type small molecules and polymers for organic field-effect transistors (OFETs) or organic photovoltaics (OPVs), where molecular packing and crystallinity directly affect charge mobility.
Case 5：Precursor for Liquid Crystal Emulsifiers in Cosmetics
Although less common, specially modified derivatives of this compound are explored in liquid crystal emulsification systems for skincare. The layered lamellar phases, stabilized by cyanobiphenyl-like intermediates, enhance active ingredient delivery and improve skin feel, representing a high-value niche beyond displays.
