• 4-Cyano-4'-heptylbiphenyl (CAS 41122-71-8) - TCI H0812 - AMI Scientific
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CAS 41122-71-8

4-Cyano-4'-heptylbiphenyl TCI H0812

4-Cyano-4'-heptylbiphenyl TCI H0812
Rp 1.151.850,00
Rp 1.151.850,00
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4-Cyano-4'-heptylbiphenyl (CAS 41122-71-8) from TCI, commonly abbreviated in the literature as 7CB, belongs to the cyanobiphenyl family — the best known and most widely cited group of liquid crystal materials in materials science. The molecule consists of two directly linked benzene rings, bearing a cyano group at one end and a seven-carbon alkyl chain at the other. This combination of a rigid core and a flexible tail produces a stable, readily observable nematic phase, which is why the compound has become a standard starting material for display research, optics work, and soft matter teaching laboratories.

The property that accounts for its widespread use is the large positive dielectric anisotropy conferred by the cyano group, combined with the chemical and photochemical stability of the biphenyl framework, which is better than that of many earlier Schiff base mesogens. The heptyl chain contributes the molecular mobility that determines where the nematic range sits and how wide it is, and it also influences the viscosity of the material, which in turn governs device response times. Because these characteristics are so thoroughly documented, 7CB is frequently treated as a reference material: measurements made on a new system can be compared directly against an established body of published data.

In Indonesian laboratories, this material is typically encountered in university and institutional research groups working on displays, photonics, and soft condensed matter, as well as in advanced instructional practicals where students observe nematic textures under a polarizing microscope. It also serves as a calibration and benchmark substance in groups developing new mesogenic formulations, where a well characterized host compound is needed before unknown materials are introduced into a measurement setup.

  • Nematic phase characterization — the stable and well documented nematic range makes this compound a dependable subject for polarizing optical microscopy and differential scanning calorimetry method development in materials laboratories.
  • Liquid crystal display research — the large positive dielectric anisotropy from the cyano group allows the material to align under an applied electric field, making it suitable for test cell fabrication and switching studies.
  • Reference and benchmark measurements — because its behavior is extensively reported in the literature, results obtained on new instruments or novel systems can be validated directly against established published values.
  • Host material for mesogenic formulations — the chemically stable biphenyl framework tolerates the addition of dopants and guest compounds, letting researchers study how additives shift phase behavior and viscosity.
  • Soft matter teaching practicals — the readily observable nematic textures and straightforward handling make it well suited to undergraduate and graduate demonstrations of liquid crystalline order and anisotropic optical behavior.

Brand TCI
CAS number 41122-71-8
Molecular formula —
Purity —
Category Materials Science > Electronic Materials > Liquid Crystal (LC) Materials
Pack sizes available in the standard TCI research pack sizes; please confirm the current catalogue options when ordering
Physical form —
Storage store according to the conditions stated on the manufacturer's label and Safety Data Sheet
  • Product code: H0812
  • Chemical name: 4-Cyano-4'-heptylbiphenyl (commonly abbreviated 7CB)

Store the container tightly closed in a cool, dry, well ventilated area, away from direct sunlight, heat sources, and strong oxidizing agents, following the specific conditions given on the manufacturer's label and Safety Data Sheet. Keep the material in its original supplier container, or in a clean, chemically compatible, clearly labelled vessel if it must be subdivided. Handle in a fume hood using safety goggles, gloves, and a laboratory coat, and avoid contact with skin and eyes as well as inhalation of any dust or vapour. Because moisture and prolonged light exposure can affect liquid crystalline materials, minimise the time the container stays open and return it promptly to its designated storage location. Consult the Safety Data Sheet before use and dispose of residues in accordance with institutional chemical waste procedures.

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