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

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Ecological data

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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

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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