4′-Pentyl-4-biphenylcarbonitrile
4′-Pentyl-4-biphenylcarbonitrile (CAS: 40817-08-1), with the linear formula CH3(CH2)4C6H4C6H4CN and a molecular weight of 249.35 g/mol, is a key organic compound primarily utilised in the field of materials science. It exhibits liquid crystal properties, specifically in its nematic phase, making it valuable for applications in organic electronics and advanced display technologies. Tech Serve Solutions supplies this compound for research and development purposes.
- IUPAC
- 4-Cyano-4-pentylbiphenyl,4-Pentyl-4-cyanobiphenyl,5CB
- Synonyms
- 4-Cyano-4-pentylbiphenyl4-Pentyl-4-cyanobiphenyl5CB

Liquid Crystal Displays (LCDs)
4′-Pentyl-4-biphenylcarbonitrile serves as a component in liquid crystal mixtures. Its nematic phase characteristics contribute to the electro-optical properties essential for display technologies.
Materials Science Research
This compound is employed in materials science for the development of novel organic electronic devices. Its unique molecular structure and properties allow for investigation into new material functionalities.
Organic Electronics
Utilised in the research and development of organic and printed electronics, 4′-Pentyl-4-biphenylcarbonitrile can be explored for its semiconducting or light-emitting properties in various device architectures.
| Molecular weight | 249.35 |
|---|---|
| Linear formula | CH3(CH2)4C6H4C6H4CN |
| Assay | 98% |
| Form | liquid crystal (nematic) |
| Boiling point | 140-150 °C/0.5 mmHg(lit.) |
| Density | 1.008 g/mL at 25 °C(lit.) |
| Refractive index | n20/D 1.532(lit.) |

Hazard statements
- H302Harmful if swallowed
- H312Harmful in contact with skin
- H315Causes skin irritation
- H319Causes serious eye irritation
- H332Harmful if inhaled
- H335May cause respiratory irritation
Precautionary statements
- P261Avoid breathing dust, fume, gas or vapours
- P280Wear protective gloves, clothing and eye/face protection
- P305IF IN EYES
| Protective equipment | Eyeshields, Faceshields, full-face respirator (US), Gloves, multi-purpose combination respirator cartridge (US), type ABEK (EN14387) respirator filter |
|---|---|
| Flash point | 113 °C / 235.4 °F |
| Water hazard class (WGK, DE) | 3 |
| Hazard codes (EU) | Xn |
| Risk statements (R) | 20/21/22-36/37/38 |
| Safety statements (S) | 23-26-28-36 |
Hazard information is provided for guidance. Always consult the product Safety Data Sheet (SDS), available on request, before handling.
Documentation
Every batch ships with a Certificate of Analysis covering assay, identity and purity; the grade is confirmed against your enquiry. Safety Data Sheets and technical data sheets are available on request.
Supply & logistics
Samples for technical evaluation; bulk MOQ by grade and packaging. In-stock material ships in 7–10 working days, worldwide, with full export documentation.
What is 4′-Pentyl-4-biphenylcarbonitrile used for?
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4′-Pentyl-4-biphenylcarbonitrile is primarily used in materials science, particularly for its properties as a nematic liquid crystal, finding applications in organic electronics and display technologies.
What are the CAS number and formula for 4′-Pentyl-4-biphenylcarbonitrile?
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The CAS number is 40817-08-1 and the linear formula is CH3(CH2)4C6H4C6H4CN.
What grade and purity does Tech Serve Solutions supply?
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Tech Serve Solutions supplies 4′-Pentyl-4-biphenylcarbonitrile with an assay of 98%. This product is supplied for research and development purposes and is not represented as USP, BP, or EP grade.
How should 4′-Pentyl-4-biphenylcarbonitrile be handled safely?
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Handling requires appropriate personal protective equipment, including eyeshields, gloves, and a suitable respirator, as it is harmful if swallowed, inhaled, or in contact with skin, and causes skin and eye irritation. Refer to the safety data sheet for full details.
How is 4′-Pentyl-4-biphenylcarbonitrile packed and shipped?
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4′-Pentyl-4-biphenylcarbonitrile is packed securely for shipping and export, adhering to all necessary regulations for chemical transport. Specific packaging details can be provided upon request.
How can I request a sample or quote for 4′-Pentyl-4-biphenylcarbonitrile?
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To request a sample or a quotation, please contact our sales department through the website or via direct email, providing your specific requirements and shipping details.
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