4-Cyano-4'-pentylbiphenyl
Synonym(s):4-Cyano-4-pentylbiphenyl;4-Pentyl-4-cyanobiphenyl;5CB
- CAS NO.：40817-08-1
- Empirical Formula: C18H19N
- Molecular Weight: 249.35
- MDL number: MFCD00036350
- EINECS: 255-093-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-05-28 05:20:05
What is 4-Cyano-4'-pentylbiphenyl?
Chemical properties
white to light yellow crysta
The Uses of 4-Cyano-4'-pentylbiphenyl
Intermediates of Liquid Crystals
The Uses of 4-Cyano-4'-pentylbiphenyl
4-Cyano-4'-n-pentylbiphenyl is used in the preparation of 4'-pentylbiphenyl-4-carboxylic acid by acidic hydrolysis using sulfuric acid as a reagent.
General Description
4′-Pentyl-4-biphenylcarbonitrile (5CB) is a nematic liquid crystal. 5CB undergoes phase transition from crystalline to nematic then to isotropic state at 18oC and 35oC respectively. It may be produced by modifying biphenyl.2
Properties of 4-Cyano-4'-pentylbiphenyl
| Melting point: | 34 °C |
| Boiling point: | 140-150 °C0.5 mm Hg(lit.) |
| Density | 1.008 g/mL at 25 °C(lit.) |
| refractive index | n |
| Flash point: | >230 °F |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Chloroform (Slightly), Methanol (Slightly) |
| form | liquid crystal (nematic) |
| color | Off-White |
| Water Solubility | insoluble |
| CAS DataBase Reference | 40817-08-1(CAS DataBase Reference) |
| NIST Chemistry Reference | [1,1'-Biphenyl]-4-carbonitrile, 4'-pentyl-(40817-08-1) |
| EPA Substance Registry System | [1,1'-Biphenyl]-4-carbonitrile, 4'-pentyl- (40817-08-1) |
Safety information for 4-Cyano-4'-pentylbiphenyl
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H317:Sensitisation, Skin |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P272:Contaminated work clothing should not be allowed out of the workplace. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P333+P313:IF SKIN irritation or rash occurs: Get medical advice/attention. |
Computed Descriptors for 4-Cyano-4'-pentylbiphenyl
| InChIKey | HHPCNRKYVYWYAU-UHFFFAOYSA-N |
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