tetraethyl orthocarbonate tetraethyl orthocarbonate

structural formula

• numbering system
• physical property data
• toxicological data
• ecological data
• molecular structure data
• computing chemical data
• more
  • properties and stability
  • storage method
  • synthesis method
  • purpose

numbering system

cas number:78-09-1

mdl number:mfcd00009221

einecs number:201-082-2

rtecs number:none

brn number:1747401

pubchem number:24886851

physical property data

1. properties: colorless ether-like odor liquid

2. density (g/ml, 25/4℃): 0.9197

3. relative density (20℃ , 4℃): 0.9186

4. melting point (ºc): 160

5. boiling point (ºc, normal pressure): 159

6. refraction at room temperature index (n²⁰): 1.3930

7. refractive index: 1.3935

8. flash point (ºc): -24°c (52°c)

9. gas phase standard combustion heat (enthalpy) (kj·mol^-1): -5521.6

10. gas phase standard claimed heat (enthalpy) ( kj·mol^-1): -878.2

11. liquid phase standard heat of combustion (enthalpy) (kj·mol^-1): -5481.0

12. liquid phase standard claims heat (enthalpy) (kj·mol^-1): -918.8

13. heat of combustion (kj/mol) : undetermined

14. critical temperature (ºc): undetermined

15. critical pressure (kpa): undetermined

16. oil and water (octanol /water) logarithmic value of the distribution coefficient: undetermined

17. explosion upper limit (%, v/v): undetermined

18. explosion lower limit (%, v/v) : undetermined

19. solubility: insoluble in water, easily soluble in ethanol and ether

toxicological data

none yet

ecological data

none yet

molecular structure data

1. molar refractive index: 50.69

2. molar volume (cm³/mol): 202.5

3. isotonic specific volume (90.2k ): 463.9

4. surface tension (dyne/cm): 27.5

5. polarizability (10-24cm³): 20.09 p>

calculate chemical data

none yet

properties and stability

1. also known as tetraethoxymethane. colorless ether-like odor liquid. boiling point 159℃. relative density 0.9197 g/ml, flash point -24°c (52°c). refractive index 1.3935. easily soluble in ethanol and ether. reacts with ammonia to form guanidine and ethanol; reacts with grignard reagent (rmgx) to form orthoester [rc(oc2h5)3].

2.this product has low toxicity and has a strong irritating effect on the respiratory tract and eyes. the maximum allowable concentration in the air850mg/m3. to prevent dust from flying at the production site, operators should wear protective equipment.
　

storage method

1. this product should be sealed and stored in a cool and dark place.

2. sealed and packaged in glass bottles and reinforced with wooden boxes. stored in a dangerous goods warehouse and transported in accordance with railway danger regulations no. 84064.

synthesis method

1. prepared by reacting sodium ethoxide and chloropicrin. its homolog propyl orthocarbon-ate, c(oc3h7)4], has a boiling point of 224°c; orthobutyl carbonate [butyl orthocar-bonate, c(c4h9)4], has a boiling point of 245°c.

purpose

1. mainly used for the synthesis of pharmaceutical intermediates and adhesives.

2.protection of 1,2-diol