Epoxy curing agent Knowledge Tetraethyl orthocarbonate Tetraethyl orthocarbonate

Tetraethyl orthocarbonate Tetraethyl orthocarbonate

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Tetraethyl orthocarbonate structural formula

Structural formula

Business number 01MQ
Molecular formula C9H20O4
Molecular weight 192.25
label

Tetraethoxymethane,

Tetraethoxymethane,

Tetraethoxymethane,

Ethylorthocarbonate,

Orthocarbonic acid tetraethyl ester,

Triethoxymethoxyethane,

Elemental organic compounds

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

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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

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