Propargyl

Organic compound

Collection

zero Useful+1

zero

This entry is made by Compilation and application of scientific encyclopedia entries of "Science Popularization China" to examine.

Propylene, also known as Methyl acetylene , is a kind of Alkyne , which skeleton symbol Is CH three C≡CH。 It is a component of MAPP gas (wind welding gas).

Chinese name: Propargyl
Foreign name: Propyne
prop-1-yne;Propyne;Propine;CH3CequivCH;ALLYLENE
Alias: Methyl acetylene

chemical formula: C three H four
molecular weight: forty point zero six three nine
CAS login number: 74-99-7
EINECS login number: 200-828-4
Solubility: Slightly soluble in water, soluble in ethanol, ether and other organic solvents

catalog

seven matters needing attention
eight Regulatory information

Physical property data

Announce

edit

1. Character: colorless gas

2. Melting point (℃): - 102.7

3. Boiling point (℃): - 23.2

4. Relative density (water=1): 0.71 (- 50 ℃)

5. Relative vapor density (air=1): 1.38

six Saturated vapor pressure （kPa）：516.76（20℃）

7. Combustion heat (kJ/mol): - 1849.6

8. Critical temperature (℃): 129.2

9. Critical pressure (MPa): 5.63

10. Octanol/water partition coefficient: 0.94

11. Flash point (℃):<- 30

12. Ignition temperature (℃): 340.15

13. Upper explosive limit (%): 11.7

14. Lower explosive limit (%): 1.7

15. Solubility: slightly soluble in water, soluble in ethanol, ether and other organic solvents.

16. Critical density (g · cm -3 ）：0.245

17. Critical volume (cm three ·mol -1 ）：163.5

18. Critical compressibility factor: 0.275

19. Eccentricity factor: 0.216

20. Gas phase standard combustion heat (enthalpy) (kJ · mol -1 )：-1936.7

21. Gas phase standard claimed heat (enthalpy) (kJ · mol -1 )：184.5

22. Gas phase standard entropy (J · mol -1 ·K -1 ) ：248.47

23. Gas phase standard free energy of formation (kJ · mol -1 )：193.5

24. Gas phase standard hot melt (J · mol -1 ·K -1 )：60.73^[1]

Molecular structure data

Announce

edit

1、 Molar refractive index ：13.77

2. Molar volume (cm three /mol）：61.8

3. Isotonic specific volume (90.2K): 130.5

4. Surface tension (dyne/cm): 19.8

5. Dielectric constant: 2.56

6. Dipole distance (10-24cm three ）: No available

7. Polarization rate: 5.46^[1]

Calculate chemical data

Announce

edit

1. Drainage parameter calculation reference value (XlogP): 0.9

2. Number of hydrogen bond donors: 0

3. Number of hydrogen bond receptors: 0

4. Number of rotatable chemical bonds: 0

5. Number of tautomers: none

6. Topological molecular polar surface area 0

7. Number of heavy atoms: 3

8. Surface charge: 0

9. Complexity: 26.5

ten Isotope atom Quantity: 0

11. Determine the number of atomic structure centers: 0

12. Number of uncertain atomic structure centers: 0

13. Determine the number of chemical bond structural centers: 0

14. Number of indeterminate chemical bond structure centers: 0

15. Number of covalent bond units: 1^[1]

Properties and stability

Announce

edit

1. Stability: stable

2. Prohibited compounds: strong oxidants, alkali metals, alkaline earth metals, heavy metals, especially copper, heavy metal salts, halogens

3. Conditions to avoid contact: heating

synthetic method

Announce

edit

By iodomethane or Dimethyl sulfate It is obtained by reacting with sodium acetylene or Grignard reagent of acetylene.

purpose

Announce

edit

1. It is used to manufacture acetone, etc.

matters needing attention

Announce

edit

Hazard Overview

Health hazard: acute inhalation may stimulate respiratory tract, causing bronchitis and pneumonia ； It has anesthetic effect.

Flammability hazard: This product is flammable and irritant.^[2]

Leakage emergency treatment

Quickly evacuate the personnel in the leakage contaminated area to Upwind , and isolate, strictly restrict access. Cut off the ignition source. It is suggested that emergency handling personnel should wear self sufficiency Positive pressure respirator , wear Antistatic clothing 。 Cut off the leakage source as much as possible. Cover the sewer and other places near the leakage point with industrial coating or adsorption/absorbent to prevent gas from entering. Reasonable ventilation to accelerate diffusion. Dilute and dissolve with spray water. Build a dike or dig a pit to collect a large amount of wastewater generated. If possible, use an exhaust fan to send the leaked gas to an open place or install an appropriate nozzle to burn it. Leaking containers shall be properly treated, repaired and inspected before reuse.^[2]

Exposure control/personal protection

China MAC (mg/m three ）: No standard

Former Soviet Union MAC (mg/m three ）: No standard

TLVTN：ACGIH 1000ppm,1640mg/m three

TLVWN: no standard

Exposure limit: USA TWA: ACGIH 1000ppm, 1600mg/m three ； American STEL: ACGIH (1250ppm), (2040mg/m three )

Monitoring method: no data

Engineering control: the production process is closed and fully ventilated.

Respiratory system protection: recommended in high concentration environment Filter gas mask （ Half mask ）。

Eye protection: no special protection is required generally, and chemicals can be worn in case of high concentration contact Safety goggles 。

Body protection: wear Antistatic clothing 。

Hand protection: wear general operation Protective gloves 。

Other protection: smoking is strictly prohibited at the work site. Avoid long-term repeated contact. When entering tanks, confined spaces or other high concentration areas for operation, someone must supervise.^[2]

Operation precautions

Closed operation, full ventilation. Operators must be specially trained and strictly abide by the operating procedures. Recommended for operators Filter gas mask （ Half mask ）, wear Antistatic clothing 。 Keep away from kindling and heat sources, and smoking is strictly prohibited in the workplace. Use explosion-proof ventilation systems and equipment. Prevent gas leakage into the air of the workplace. Avoid contact with oxidants and halogens. During transmission, the cylinder and container must be grounded and bridged to prevent static electricity 。 The cylinder and accessories shall be handled with care to prevent damage. Fire fighting equipment and leakage emergency treatment equipment of corresponding types and quantities shall be provided.^[2]

Transportation precautions

The railway transportation shall be reported to the railway bureau for trial operation, which lasts for two years. After the test run, a test run report shall be written and submitted to the Ministry of Railways to officially announce the transportation conditions. When using steel cylinders for transportation, it is necessary to wear safety hat 。 Cylinders are generally placed horizontally, and the mouth of the cylinder should be in the same direction, not crossed; The height shall not exceed the protective fence of the vehicle, and shall be firmly clamped with triangular wood pad to prevent rolling. The transport vehicles shall be equipped with corresponding types and quantities of fire-fighting equipment. The exhaust pipe of the vehicle transporting this article must be equipped with a fire retardant device. It is prohibited to use mechanical equipment and tools that are easy to generate sparks for loading and unloading. It is strictly prohibited to mix with oxidants, halogens, edible chemicals, etc. Transport in the morning and evening in summer to prevent sunlight exposure. Keep away from kindling and heat sources during stopover. Road transportation shall be carried out according to the specified route, and it is forbidden to stay in residential areas and densely populated areas. It is forbidden to slip during railway transportation.^[2]

Precautions for storage

Store in a cool and ventilated warehouse. Keep away from kindling and heat sources. The warehouse temperature should not exceed 30 ℃. It shall be stored separately from oxidants and halogens, and mixed storage is strictly prohibited. Explosion proof lighting and ventilation facilities shall be adopted. It is prohibited to use mechanical equipment and tools that are easy to generate sparks. The storage area shall be equipped with leakage emergency treatment equipment.^[2]

Regulatory information

Announce

edit

Regulations on the Safety Management of Dangerous Chemicals (issued by the State Council on February 17, 1987), detailed rules for the implementation of the Regulations on the Safety Management of Dangerous Chemicals (HLF [1992] No. 677), regulations on the safe use of chemicals in the workplace (LBF [1996] No. 423) and other regulations have made corresponding provisions on the safe use, production, storage, transportation, loading and unloading of dangerous chemicals; The classification and signs of commonly used hazardous chemicals (GB 13690-92) classify the substance as Class 2.1 flammable gas.^[2]

Novice on the road

Growth task Getting Started with Editing Edit Rule Edit by myself

I have questions

Content query Online Service Official post bar Feedback

Complaints and suggestions

Report bad information Failed to appeal through entries Complaint of infringement information Blocking query and unblocking

Jinggong Network Anbei No. 1100000200001