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78-09-1

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Identification

Name
Tetraethyl orthocarbonate
CAS
78-09-1
Synonyms
ORTHOCARBONIC ACID TETRAETHYL ESTER
TETRAETHOXYMETHANE
TETRAETHYL ORTHOCARBONATE
1-(Triethoxymethoxy)ethane
1,1’,1’’,1’’’-[methanetetrayltetrakis(oxy)]tetrakis-ethan
Tetraehtylorthocarbonate
Tetraethyl-2-carbonate
Tetraethyl orthocarbonate, 98+%
Ethane, 1,1,1,1-methanetetrayltetrakis(oxy)tetrakis-
Tetraethyl orthocarbonate 98%min CAS[78-09-1
ethyl orthocarbonate
triethoxymethoxy-ethane
Tetraethyl orthocarbonate (TEOC)
TRIETHYL ORTHOCARBONATE
EINECS(EC#)
201-082-2
Molecular Formula
C9H20O4
MDL Number
MFCD00009221
Molecular Weight
192.25
MOL File
78-09-1.mol

Chemical Properties

Appearance
clear colorless liquid
Melting point 
222 °C
Boiling point 
159 °C (lit.)
bp 
159 °C(lit.)

density 
0.919 g/mL at 25 °C(lit.)

refractive index 
n20/D 1.392(lit.)

Fp 
127 °F

storage temp. 
Refrigerator
Specific Gravity
0.919
Water Solubility 
Insoluble
Sensitive 
Moisture Sensitive
BRN 
1747401
CAS DataBase Reference
78-09-1(CAS DataBase Reference)
NIST Chemistry Reference
Ethane, 1,1',1'',1'''-[methanetetrayltetrakis(oxy)]tetrakis-(78-09-1)
EPA Substance Registry System
78-09-1(EPA Substance)

Safety Data

Hazard Codes 
Xi,F
Risk Statements 
R10:Flammable.
R36/37/38:Irritating to eyes, respiratory system and skin .
Safety Statements 
S37/39:Wear suitable gloves and eye/face protection .
S26:In case of contact with eyes, rinse immediately with plenty of water and seek medical advice .
S16:Keep away from sources of ignition-No smoking .
S36:Wear suitable protective clothing .
RIDADR 
UN 3272 3/PG 3

WGK Germany 
3


21
HazardClass 
3
PackingGroup 
III
HS Code 
29209010

Raw materials And Preparation Products

Material Safety Data Sheet(MSDS)

Hazard Information

Chemical Properties
clear colorless liquid
Uses
Tetraethyl Orthocarbonate is used in the synthesis of chemokine receptor-5 inhibitors against HIV-1, benzobisoxazoles and in the preparation of organic semiconductors. It is also employed in the synthesis of 2,7-dimethylene-1,4,6,9-tetraoxaspiro[4,4]nonane and in the synthesis of cross linked poly(orthocarbonate)s used as organic solvent absorbent.
Purification Methods
Likely impurities are hydrolysis products. Shake the orthocarbonate with brine (saturated NaCl, dilute with a little Et2O if amount of material is small) and dry (MgSO4). The organic layer is filtered off and evaporated, and the residue is distilled through a helices packed fractionating column with a total reflux partial take-off head. All distillations can be done at atmospheric pressure in an inert atmosphere (e.g. N2). [Roberts & McMahon Org Synth Coll Vol IV 457 1963, Connolly & Dyson J Chem Soc 828 1937, Tieckelmann & Post J Org Chem 13 266 1948, for review see Kantlehner et al. Justus Liebigs Ann Chem 507 207 1982, Beilstein 3 IV 6.]

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