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1,3-Cyclohexadiene

Organic compound

1,3-Cyclohexadiene, also known as 1,2-dihydrobenzene, is a kind of Organic compound , chemical formula is C six H eight , for colorless liquid , insoluble in water, soluble in ethanol 、 Ether Equal majority Organic solvent , mainly used as organic synthesis intermediates.

Chinese name: 1,3-Cyclohexadiene
Foreign name: 1,3-cyclohexadiene
Alias: 1,2-Dihydrobenzene
chemical formula: C six H eight
molecular weight: eighty point one two eight
CAS login number: 592-57-4
EINECS login number: 209-764-1

Melting point: -98 ℃
Boiling point: 80 ℃
Water solubility: Insoluble
Density: 0.841 g/cm ³
Appearance: colorless liquid
Security description: S9； S16； S29； S33
Hazard symbol: F； Xi
Hazard description: R11； R37

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six First aid measures
seven Fire fighting measures
eight Leakage emergency treatment
nine Protective measures
ten Operation, disposal, storage and transportation

Physical and chemical properties

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Density: 0.841g/cm three

Melting point: - 98 ℃

Boiling point: 80 ℃

critical pressure ：4.45MPa

Refractive index ：1.474（20℃）

Vapor pressure ：55.7mmHg at 25°C

Upper explosive limit （ V / V ）：7.8%

Lower explosive limit （ V / V ）：1.4%

Appearance: colorless liquid

Solubility : Insoluble in water, soluble in ethanol, ether and other organic solvents^[1]

Molecular structure data

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Molar refractive index ：26.87

Molar volume （cm three /mol）：93.0

Isotonic capacity （90.2K）：223.0

surface tension （dyne/cm）：33.0

Dielectric constant （F/m）：2.21

Polarizability （10 -24 cm three ）：10.65^[1]

Calculate chemical data

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Calculation of drainage parameters reference value (XlogP): None

Number of hydrogen bond donors: 0

Number of hydrogen bond receptors: 0

Rotatable Chemical bond Quantity: 0

Tautomer Quantity: 0

topology molecule Polar surface area ：0

Heavy atom Quantity: 6

surface charge ：0

Complexity: 66

Isotope atom Quantity: 0

Determine the number of atomic structure centers: 0

Number of uncertain atomic structure centers: 0

Determine the number of chemical bond structure centers: 0

Number of uncertain chemical bond structure centers: 0

covalent bond Number of units; one^[1]

toxicology data

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acute toxicity ：LC fifty ：45000mg/m three （ mice Inhalation, 2h).^[1]

purpose

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It is mainly used as an intermediate in organic synthesis.

First aid measures

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Skin contact: Take off the contaminated clothes and wash the skin thoroughly with soapy water and clean water.

Eye contact: lift the eyelid, use flowing water or normal saline rinse. Get medical attention.

Inhalation: quickly leave the site to a place with fresh air. keep respiratory tract unobstructed. as dyspnea , give oxygen. as Apnea , perform artificial respiration immediately. Get medical attention.

Ingestion: drink enough warm water to induce vomiting. Get medical attention.

Fire fighting measures

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Hazard characteristics: flammable, its vapor and air can form Explosive mixture , in case of open fire High fever Can cause Combustion explosion 。 It can react strongly with oxidants. Static electricity may be generated after high-speed impact, flow and agitation Spark discharge Causes combustion and explosion. his Vapor ratio The air is heavy and can spread to a relatively far place at a lower place, and will ignite and recoil in case of fire source.

Harmful Combustion products ： carbon monoxide 、 carbon dioxide 。

Fire extinguishing method: Water spray cooling Container, if possible, move the container from the fire site to an open place. If the container in the fire has changed color or is safe Pressure relief device If there is a sound in the air, evacuate immediately. Extinguishing agent: foam, dry powder, carbon dioxide, sand. Fire extinguishing with water is invalid.

Leakage emergency treatment

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Evacuate the personnel in the leakage contaminated area to a safe area quickly, isolate them, and strictly restrict access. Cut off the ignition source. proposal Emergency Management Personnel shall wear self-contained positive pressure respirators and anti-static work clothes. Cut off the leakage source as much as possible. Prevent from flowing into sewer Flood discharge ditch And so on.

Small leakage: use Activated carbon Or others Inert material Absorption. Incombustibility can also be used dispersant Brushing with the prepared emulsion, Lotion After dilution, it is put into the waste water system.

Large amount of leakage: build a dike or dig a pit to receive. Cover with foam to reduce steam disaster. Transfer to tank car or special purpose with explosion-proof pump collector Inside, recycle or transport to waste disposal Site disposal.

Protective measures

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Engineering control: Production process airtight, General ventilation 。 Provide safety shower and eyewash equipment.

respiratory system Protection: It should be worn when the concentration in the air exceeds the standard Self-priming Filter gas mask （ Half mask ）。

Eye protection: wear chemical Safety goggles 。

Body protection: wear Antistatic clothing 。

Hand protection: wear Rubber oil resistant gloves 。

Other protection: work site Smoking is strictly prohibited. 。 Avoid long-term repeated contact.

Operation, disposal, storage and transportation

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Precautions for operation: closed operation, full ventilation. Operators must be specially trained and strictly abide by Operating Procedures 。 It is recommended that operators wear self-priming filter gas mask (half mask), chemical safety goggles, anti-static work clothes and rubber oil resistant gloves. Keep away from kindling and heat source, Workplace No smoking. Use explosion-proof ventilation system And equipment. Prevent vapor leakage into the air of the workplace. Avoid contact with oxidants and acids. The flow rate shall be controlled during filling, and Grounding device , prevent electrostatic accumulation 。 Load and unload gently during transportation to prevent damage to packaging and containers. Equipped with corresponding varieties and quantities Fire Equipment and Leakage emergency treatment Equipment. Empty containers may leave harmful substances.

Precautions for storage: store in a cool and ventilated warehouse. Keep away from kindling and heat sources. The warehouse temperature should not exceed 30 ℃. The package shall be sealed and shall not contact with air. It shall be stored separately from oxidants and acids, and mixed storage is strictly prohibited. It should not be stored in large quantities or for a long time. Explosion proof lighting and ventilation facilities shall be adopted. It is forbidden to use those easy to generate sparks mechanical equipment And tools. The storage area shall be equipped with leakage emergency treatment equipment and appropriate materials.

Packaging method ： Ampoule Outside the bottle Ordinary wooden case ； Threaded port Glass bottles , iron cap pressure mouth glass bottle Plastic bottle Or ordinary wooden cases outside metal drums (cans).

Precautions for transportation: the transportation vehicles shall be equipped with fire fighting equipment of corresponding types and quantities and leakage emergency treatment equipment. It is better to transport in the morning and evening in summer. The tank (tank) truck used for transportation shall have Grounding chain The slot can be equipped with a hole separator to reduce the static electricity generated by vibration. It is strictly prohibited to mix with oxidants, acids, edible chemicals, etc. During transportation, it shall be protected from sun exposure, rain and high temperature. Keep away from kindling, heat source and high temperature area during stopover. Vehicle carrying the item exhaust pipe Fire arresting devices must be equipped. It is forbidden to use mechanical equipment and tools that are easy to generate sparks for loading and unloading. road transport When driving, please follow the specified route, not in residential areas and Densely populated area stop. It is forbidden to slip during railway transportation. Wooden boats are strictly prohibited Cement barge Bulk transportation 。