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  • 338680 - 4′-Octyl-4-biphenylcarbonitrile

338680 Aldrich


liquid crystal (nematic), 98%



Related Categories Liquid Crystals, Materials Science, Nematic, Organic and Printed Electronics
assay   98%
form   liquid crystal (nematic)


Frequently Asked Questions

Frequently Asked Questions are available for this Product.


1 g in glass bottle


Monolayer films of the LCs deposited onto highly ordered pyrolytic graphite, these self-assembled films display a wide variety of structural forms.

General description

4′-octyl-4-biphenylcarbonitrile (8CB) is a low molar mass liquid crystal (LC), which shows different liquid crystalline phases depending on temperature conditions. Under normal temperature conditions 8CB exists only as a bulk smectic-A phase. LCs are responsive to subtle changes in temperature, shear, electric (or magnetic) fields, and the structure of solid surfaces with which they are in contact.

Price and Availability

Safety & Documentation

Safety Information

GHS07  GHS07
Signal word 
Hazard statements 
Precautionary statements 
NONH for all modes of transport
WGK Germany 
Flash Point(F) 
235.4 °F
Flash Point(C) 
113 °C

Frequently Asked Questions

Which document(s) contains shelf-life or expiration date information for a given product?
If available for a given product, the recommended re-test date or the expiration date can be found on the Certificate of Analysis. These documents are located on the product detail page under Useful Links & Tools. Click on the following link to search for a Certificate of Analysis. Please click the following link to see the details on our Product Dating Information.
How do I get lot-specific information or a Certificate of Analysis?
A Certificate of Analysis is available by lot number and can be obtained through our Advanced Search Option: http://www.sigmaaldrich.com/catalog/AdvancedSearchPage.do
How do I find price and availability?
There are several ways to find pricing and availability for our products.  Once you log onto our website, you will find the price and availability displayed on the product detail page. You can contact any of our Customer Sales and Service offices to receive a quote.  USA customers:  1-800-325-3010 or view local office numbers. 
What is the Department of Transportation shipping information for this product?
Transportation information can be found in Section 14 of the product's (M)SDS. To access the shipping information for this material, use the link on the product detail page for the product, or search here. 
My question is not addressed here, how can I contact Technical Service for assistance?
Use the option to the right to "Ask a Question" by email of a Technical Service Scientist.
What is the anisotropy refractive index and anisotropy electric permittivity for product 338680, 4′-Octyl-4-biphenylcarbonitrile?
Literature values for the anisotropy refractive index and anisotropy electric permittivity of product 338680, 4′-Octyl-4-biphenylcarbonitrile are as follows: ne=1.673 no=1.516 in 27oC e||=12.8 e^=6.65 De=6.15 in 39.4oC
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Protocols & Articles
Peer-Reviewed Papers


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