4′-Methyl-2-cyanobiphenyl(CAS#114772-53-1)
| Hazard Symbols | Xn – Harmful |
| Risk Codes | R20/21/22 – Harmful by inhalation, in contact with skin and if swallowed. R36/37/38 – Irritating to eyes, respiratory system and skin. |
| Safety Description | S22 – Do not breathe dust. S26 – In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. S36/37/39 – Wear suitable protective clothing, gloves and eye/face protection. |
| WGK Germany | 3 |
| HS Code | 27075000 |
4′-Methyl-2-cyanobiphenyl(CAS#114772-53-1)
quality
Colorless crystals that turn dark when exposed to light. Melting point 65 °c. Boiling point 140~150 °C (0.133kPa). Relative density 1. 094。 Insoluble in water, heating is polymerization.
Method
It is prepared by the reaction of carbazole potassium with ethylene oxide (or vinyl chloride).
Carbazole is added to acetylene at high pressure.
use
N vinylcarbazole is polymerized into polyvincarbazole, which has good heat resistance and chemical stability, high softening point, low dielectric loss, and light conductivity, which is widely used in the electronics industry and electrostatic copying technology.
security
Poisonous. It has a significant sensitizing effect on the skin. With repeated exposure, its sensitivity increases considerably. Intragastric administration (suspension) LD50 0.05g/kg in mice. Guinea pigs are gaved with 0. 5g/kg, all died after 2~3 days. Rabbit ears are coated with the powder of this product or immersed in 1% ethanol solution of this product for 1 minute, that is, inflammatory edema, ulcers, peeling, and hair removal appear. The production workshop should have good ventilation and the equipment should be airtight. Operators should wear gloves, sleeves, aprons, and boots. When working with this product, it is necessary to prevent sun exposure. Eating in the workplace is strictly prohibited. Patients with skin diseases are not allowed to engage in this type of work. Those who are allergic to this product should change to other jobs.
Lined with plastic bags and covered with cardboard buckets. Store in a cool, ventilated and dry place. Sunscreen and moisture-proof. Storage and transportation according to the provisions of toxic chemicals.
