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1445-45-0

Basic Information
CAS No.: 1445-45-0
Name: Trimethyl orthoacetate
Article Data: 18
Cas Database
Molecular Structure:
Molecular Structure of 1445-45-0 (Trimethyl orthoacetate)
Formula: C5H12O3
Molecular Weight: 120.148
Synonyms: Orthoacetic acid, trimethyl ester;Ethane, 1,1,1-trimethoxy-;
EINECS: 215-892-9
Density: 0.922 g/cm3
Melting Point: -58oC
Boiling Point: 108 °C at 760 mmHg
Flash Point: 16.7 °C
Solubility: hydrolysis in water
Appearance: Colorless transparent liquid
Hazard Symbols: FlammableF,IrritantXi
Risk Codes: 11-43-38-36/37/38
Safety: 16-37/39-24-33-26-7/9
Transport Information: UN 3272 3/PG 2
PSA: 27.69000
LogP: 0.59930
Synthetic route
67-56-1

methanol

75-05-8

acetonitrile

1445-45-0

Trimethyl orthoacetate

Conditions
ConditionsYield
Stage #1: methanol; acetonitrile With hydrogenchloride; cetyltrimethylammonium chloride In hexane at -10℃; for 6h; Large scale;
Stage #2: methanol at 40℃; for 4h; pH=5-6; Reagent/catalyst; Temperature; Large scale;
95.16%
Stage #1: methanol; acetonitrile With hydrogenchloride In 1,3,5-trimethyl-benzene at 0 - 25℃; for 8h; Large scale;
Stage #2: With ammonia at 0 - 39℃; for 8h; pH=5 - 6; Solvent; Large scale;
87%
Stage #1: methanol; acetonitrile With hydrogenchloride In 1,3,5-trimethyl-benzene at 0 - 25℃; Large scale;
Stage #2: With ammonia at 37 - 39℃; for 8h; pH=5-6; Solvent; Large scale;
87%
67-56-1

methanol

14777-27-6

methyl acetimidate hydrochloride

1445-45-0

Trimethyl orthoacetate

Conditions
ConditionsYield
With ammonia at 0 - 40℃; pH=5.6;80%
67-56-1

methanol

594-72-9

1,1-dichloro-1-nitroethane

124-41-4

sodium methylate

1445-45-0

Trimethyl orthoacetate

Conditions
ConditionsYield
Irradiation;56%
922-69-0

1,1-dimethoxyethylene

75-07-0

acetaldehyde

A

1445-45-0

Trimethyl orthoacetate

B

123-73-9

trans-Crotonaldehyde

C

623-43-8

crotonic acid methyl ester

D

79-20-9

acetic acid methyl ester

Conditions
ConditionsYield
at 150℃;
67-56-1

methanol

60-29-7

diethyl ether

82190-86-1

1-((2-chloroethyl)oxy)ethanimine hydrochloride

A

1445-45-0

Trimethyl orthoacetate

B

82190-84-9

1,1-divinyloxy-1-methoxyethane

Conditions
ConditionsYield
With potassium tert-butylate Yield given. Yields of byproduct given;
67-56-1

methanol

79-20-9

acetic acid methyl ester

1445-45-0

Trimethyl orthoacetate

Conditions
ConditionsYield
With triethylamine at 37℃; Irradiation; gas phase alcoholysis; Yield given;
1445-45-0

Trimethyl orthoacetate

87-91-2

diethyl (2R,3R)-tartrate

134745-01-0

diethyl (4R)-trans-2-methoxy-2-methyl-1,3-dioxolan-4,5-dicarboxylate

Conditions
ConditionsYield
With toluene-4-sulfonic acid In dichloromethane at 20℃; for 12h;100%
With sulfuric acid In benzene at 80℃;98%
1445-45-0

Trimethyl orthoacetate

69097-20-7

tris(trimethylsilyloxy)ethylene

108009-58-1

3,3-Dimethoxy-2-(trimethylsiloxy)butansaeure-trimethylsilylester

Conditions
ConditionsYield
With trimethylsilyl trifluoromethanesulfonate In dichloromethane at 0℃; for 16h;100%
1445-45-0

Trimethyl orthoacetate

122517-81-1

(2R,3S)-methyl 2,3-dihydroxy-3-(4-methoxyphenyl)propanoate

106146-95-6

(4R,5S)-2-Methoxy-5-(4-methoxy-phenyl)-2-methyl-[1,3]dioxolane-4-carboxylic acid methyl ester

Conditions
ConditionsYield
With toluene-4-sulfonic acid100%
1445-45-0

Trimethyl orthoacetate

82204-15-7

4-methoxy-2-(trimethylsilyloxy)furan

82204-19-1

methyl 5-(1,1-dimethoxyethyl)tetronate

Conditions
ConditionsYield
With titanium tetrachloride In dichloromethane -95 deg C, 1 h, RT., 2 days;100%
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    Product Name: Trimethyl orthoacetate Synonyms: 1,1,1-trimethoxy-ethan;CH3C(OCH3)3;Methyl orthoacetate;trimethyl-acetate;Trimethylorthoaceate;ORTHOACETIC ACID TRIMETHYL ESTER;TMOA;TRIMETHYL ORTHOACETATE CAS: 1445-45-0 MF: C5H12O3 MW: 120.15

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Chemistry

Molecular Structure of Trimethyl orthoacetate (CAS No.1445-45-0):

Molecular Formula: C5H12O3
Molecular Weight: 120.14698
IUPAC Name: 1,1,1-Trimethoxyethane
CAS No: 1445-45-0
EINECS: 215-892-9
H bond acceptors: 3
H bond donors: 0
Freely Rotating Bonds: 3
Polar Surface Area: 27.69 Å2
Index of Refraction: 1.383
Molar Refractivity: 30.41 cm3
Molar Volume: 130.2 cm3
Surface Tension: 23 dyne/cm
Density: 0.922 g/cm3
Flash Point: 16.7 °C
Enthalpy of Vaporization: 33.25 kJ/mol
Boiling Point: 108 °C at 760 mmHg
Vapour Pressure: 30.9 mmHg at 25°C
Solubility: Hydrolysis in water
Storage Temp.: Flammables area
Appearance: Clear colourless to slightly brown liquid
Canonical SMILES: CC(OC)(OC)OC
InChI: InChI=1S/C5H12O3/c1-5(6-2,7-3)8-4/h1-4H3
InChIKey: HDPNBNXLBDFELL-UHFFFAOYSA-N
Product Categories: Orthoesters

Safety Profile

Safety Information of Trimethyl orthoacetate (CAS No.1445-45-0):
Hazard Codes: FlammableF,IrritantXi
Risk Statements: 11-43-38-36/37/38 
R11:Highly flammable. 
R43:May cause sensitization by skin contact. 
R38:Irritating to skin. 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 16-37/39-24-33-26-7/9 
S16:Keep away from sources of ignition. 
S37/39:Wear suitable gloves and eye/face protection. 
S24:Avoid contact with skin. 
S33:Take precautionary measures against static discharges. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S7:Keep container tightly closed. 
S9:Keep container in a well-ventilated place.
RIDADR: UN 3272 3/PG 2
WGK Germany: 1
HazardClass: 3
PackingGroup: II
HS Code: 29159080

Specification

  Trimethyl orthoacetate (CAS No.1445-45-0), it also can be called 1,1,1-Trimethoxyethane ; Orthoacetic acid, trimethyl ester ; Ethane, 1,1,1-trimethoxy- .