1,4-Dicyanobenzene
Synonym(s):Terephthalonitrile
- CAS NO.：623-26-7
- Empirical Formula: C8H4N2
- Molecular Weight: 128.13
- MDL number: MFCD00001810
- EINECS: 210-783-2
- SAFETY DATA SHEET (SDS)
- Update Date: 2026-01-13 11:25:15
What is 1,4-Dicyanobenzene?
Chemical properties
biege powder
The Uses of 1,4-Dicyanobenzene
1,4-dicyanobenzene as a new internal standard in utilizing solid-state infrared intensity methods for the determination of thiocyanate bonding. Used as photosensitizer in [2+2] cycloadditions, nitrile building block.
What are the applications of Application
1,4-Dicyanobenzene is a nitrile building block
Synthesis Reference(s)
The Journal of Organic Chemistry, 51, p. 4714, 1986 DOI: 10.1021/jo00374a041
Tetrahedron Letters, 8, p. 759, 1967
Safety Profile
Moderately toxic by ingestion and intraperitoneal routes. An eye irritant. When heated to decomposition it emits toxic fumes of CNand NO,. See also NITRILES.
Purification Methods
Crystallise the dinitrile from EtOH or AcOH, and has m 221.5-222.5o after sublimation. [Beilstein 9 H 846, 9 I 376, 9 II 613, 9 III 4255, 9 IV 3328.]
Properties of 1,4-Dicyanobenzene
| Melting point: | 221-225 °C (lit.) |
| Boiling point: | 227.54°C (rough estimate) |
| Density | 1.3g/cm3(25℃) |
| vapor density | 4.42 |
| refractive index | 1.6231 (estimate) |
| storage temp. | Sealed in dry,Room Temperature |
| solubility | Chloroform (Slightly), DMSO (Slightly) |
| form | Powder |
| color | White to light yellow |
| Water Solubility | 0.08 g/L (23 ºC) |
| BRN | 1072210 |
| Exposure limits | NIOSH: IDLH 25 mg/m3 |
| Stability: | Stable. Incompatible with strong acids, strong bases, strong oxidizing agents, strong reducing agents. |
| CAS DataBase Reference | 623-26-7(CAS DataBase Reference) |
| NIST Chemistry Reference | 1,4-Benzenedicarbonitrile(623-26-7) |
| EPA Substance Registry System | 1,4-Benzenedicarbonitrile (623-26-7) |
Safety information for 1,4-Dicyanobenzene
| Signal word | Warning |
| Pictogram(s) |
 Exclamation Mark Irritant GHS07 |
| GHS Hazard Statements |
H315:Skin corrosion/irritation H319:Serious eye damage/eye irritation H335:Specific target organ toxicity, single exposure;Respiratory tract irritation |
| Precautionary Statement Codes |
P261:Avoid breathing dust/fume/gas/mist/vapours/spray. P264:Wash hands thoroughly after handling. P264:Wash skin thouroughly after handling. P271:Use only outdoors or in a well-ventilated area. P280:Wear protective gloves/protective clothing/eye protection/face protection. P302+P352:IF ON SKIN: wash with plenty of soap and water. P305+P351+P338:IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continuerinsing. |
Computed Descriptors for 1,4-Dicyanobenzene
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