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120-47-8

Basic Information
CAS No.: 120-47-8
Name: Benzoic acid,4-hydroxy-, ethyl ester
Article Data: 191
Cas Database
Molecular Structure:
Molecular Structure of 120-47-8 (Benzoic acid,4-hydroxy-, ethyl ester)
Formula: C9H10O3
Molecular Weight: 166.177
Synonyms: Benzoicacid, p-hydroxy-, ethyl ester (6CI,8CI);4-(Ethoxycarbonyl)phenol;4-Carbethoxyphenol;4-Hydroxybenzoic acid ethyl ester;Aseptin A;Aseptine A;Aseptoform E;Bonomold OE;E 214;Easeptol;Ethyl 4-hydroxybenzoate;EthylButex;Ethyl nipagin;Ethyl p-hydroxybenzoate;Ethyl parasept;Ethylparaben;Mekkings E;Mycocten;p-(Ethoxycarbonyl)phenol;p-Carbethoxyphenol;p-Hydroxybenzoate ethyl ester;
EINECS: 204-399-4
Density: 1.168 g/cm3
Melting Point: 114-117 °C(lit.)
Boiling Point: 297.5 °C at 760 mmHg
Flash Point: 120.3 °C
Solubility: Soluble in ethanol, ether and acetone, slightly soluble in water
Appearance: white crystalline powder
Hazard Symbols: IrritantXi
Risk Codes: 36/37/38
Safety: 26-36-24/25
Transport Information: N/A
PSA: 46.53000
LogP: 1.56890
Synthetic route
7471-31-0

4-(ethoxycarbonyl)phenyl benzoate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With sodium; diphenyldisulfane In 1-methyl-pyrrolidin-2-one at 90℃; for 0.5h;100%
With potassium carbonate In 1-methyl-pyrrolidin-2-one at 100℃; for 3h;88%
With potassium fluoride; thiophenol In 1-methyl-pyrrolidin-2-one at 100℃; for 1h;82%
56441-55-5

ethyl 4-(benzyloxy)benzoate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With palladium diacetate; sodium hydride In N,N-dimethyl acetamide at 50℃; for 5h; Inert atmosphere;99%
With palladium diacetate; sodium hydride In N,N-dimethyl acetamide at 50℃; for 5h; Inert atmosphere;99%
5443-37-8

ethyl 4-(n-prop-2'-enyloxy)benzoate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With ammonium formate; palladium on activated charcoal In methanol for 0.5h; Heating;98%
105-58-8

Diethyl carbonate

99-96-7

4-hydroxy-benzoic acid

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With ethanol; sulfuric acid at 100℃; for 24h; Neat (no solvent); chemoselective reaction;97.22%
64-17-5

ethanol

99-96-7

4-hydroxy-benzoic acid

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With sulfuric acid for 5h; Reflux;97%
With sulfuric acid for 24h; Reflux;96%
With [1-(3-sulfonic acid)]propyl-3-methylimidazolium hydrogen sulfate at 85 - 100℃; for 3h;95.8%
13031-45-3

ethyl 4-acetoxybenzoate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With Candida cylindracea lipase In di-isopropyl ether; butan-1-ol at 28 - 30℃; for 14h;97%
With sodium tetrahydroborate; cobalt(II) chloride In ethanol at 0 - 25℃; for 10h;94%
With sodium; diphenyldisulfane In 1-methyl-pyrrolidin-2-one at 90℃; for 0.5h;87%
153025-65-1

ethyl (4-tert-butyldimethylsilyloxyphenyl)glyoxylate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With potassium hydroxide In ethanol at 20℃; for 1.5h;97%
With sodium phosphate dodecahydrate In N,N-dimethyl-formamide at 20℃; for 2h; chemoselective reaction;86%
With copper(ll) sulfate pentahydrate In methanol at 100℃; for 0.25h; Microwave irradiation;
4334-88-7

p-ethoxycarbonylphenylboronic acid

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With dihydrogen peroxide In water at 30℃; Green chemistry;97%
With sodium chlorite In water at 20℃; for 0.5h;90%
With 10-methylacridine-3(10H)-one; oxygen; N-ethyl-N,N-diisopropylamine In water at 20℃; for 24h; Reagent/catalyst; Time; Irradiation; Green chemistry;88%
With water; oxygen; copper dichloride at 60℃; under 760.051 Torr; for 24h;67%
23676-09-7

ethyl 4-ethoxybenzoate

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With aluminium trichloride In dichloromethane; ethanethiol for 9.5h; Ambient temperature;95.5%
With aluminium trichloride In dichloromethane; ethanethiol for 9.5h; Ambient temperature;95.5%
With aluminium trichloride; ethanethiol
64-17-5

ethanol

201230-82-2

carbon monoxide

540-38-5

4-Iodophenol

120-47-8

Ethyl 4-hydroxybenzoate

Conditions
ConditionsYield
With 4 A molecular sieve; (Ph3P)PdCl2 In tetrahydrofuran at 100℃; under 22800 Torr; for 24h;95%
bis-triphenylphosphine-palladium(II) chloride In various solvent(s) at 100℃; under 22800 Torr; for 24h;99 % Spectr.
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Chemistry

Empirical Formula: C9H10O3
Molecular Weight: 166.1739 g/mol
EINECS: 204-399-4 
Index of Refraction: 1.538
Density: 1.168 g/cm3
Flash Point: 120.3 °C
Melting point: 115-118 °C(lit.)
Storage tempreture: 0-6 °C
Appearance: White crystalline powder
Enthalpy of Vaporization: 55.89 kJ/mol
Boiling Point: 297.5 °C at 760 mmHg
Vapour Pressure: 0.000759 mmHg at 25 °C
Solubility: Soluble in ethanol, ether and acetone, slightly soluble in water
Structure of Ethylparaben (CAS NO.120-47-8):
               
IUPAC Name: Ethyl 4-hydroxybenzoate
Product Category of Ethylparaben (CAS NO.120-47-8): Pharmaceutical Raw Materials;Aromatic Esters

Uses

 Ethylparaben (CAS NO.120-47-8) is used as a food preservative, and is also used in the pharmaceutical, leather and other industries.

Production

 Ethylparaben (CAS NO.120-47-8) can be obtained from the right-hydroxy benzoic acid and ethanol in the presence of sulfuric acid as catalyst for esterification, after that having them in water for crystallization, and then through filter and pickling to get the product.

Toxicity Data With Reference

Organism Test Type Route Reported Dose (Normalized Dose) Effect Source
dog LD50 oral 5gm/kg (5000mg/kg)   FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 81, 1974.
guinea pig LD50 oral 2gm/kg (2000mg/kg)   FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 81, 1974.
mouse LD50 intraperitoneal 520mg/kg (520mg/kg)   Drug Standards. Vol. 20, Pg. 89, 1952.
mouse LD50 oral 3gm/kg (3000mg/kg)   Bromatologia i Chemia Toksykologiczna. Vol. 14, Pg. 301, 1981.
rabbit LD50 oral 5gm/kg (5000mg/kg)   FAO Nutrition Meetings Report Series. Vol. 53A, Pg. 81, 1974.
rat LD oral > 200mg/kg (200mg/kg)   Acta Obstetrica et Gynaecologica Japonica, English Edition. Vol. 22, Pg. 94, 1975.
 

Safety Profile

Hazard Codes: IrritantXi
Risk Statements: 36/37/38 
R36/37/38:Irritating to eyes, respiratory system and skin.
Safety Statements: 26-36-24/25 
S24/25:Avoid contact with skin and eyes. 
S26: In case of contact with eyes, rinse immediately with plenty of water and seek medical advice. 
S36:Wear suitable protective clothing.

Specification

 Ethylparaben , its cas register number is 120-47-8. It also can be called Ethyl paraben ; 4-(Ethoxycarbonyl)phenol ; Ethyl 4-hydroxybenzoate ; p-Hydroxybenzoate ethyl ester ; Ethyl butex ; 4-Hydroxybenzoic acid ethyl ester ; and Ethyl p-hydroxybenzoate . It is hazardous, so the first aid measures and others should be known. Such as: When on the skin: first, should flush skin with plenty of water immediately for at least 15 minutes while removing contaminated clothing. Secondly, get medical aid. Or in the eyes: Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Then get medical aid soon. While, it's inhaled: Remove from exposure and move to fresh air immediately. Give artificial respiration while not breathing. When breathing is difficult, give oxygen. And as soon as to get medical aid. Then you have the ingesting of the product: Wash mouth out with water, and get medical aid immediately. Notes to physician: Treat supportively and symptomatically.
In addition, Ethylparaben (CAS NO.120-47-8) is not compatible with strong oxidizing agents, and you must not take it with incompatible materials. And also prevent it to broken down into hazardous decomposition products: carbon monoxide, carbon dioxide.

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