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DIETHYL PHTALATE, Diethyl phthalate, DEP, Ethyl phthalate, Phthalic Acid Diethyl Ester, Benzene dicarboxylic acid diethyl ester, 84-66-2 

DIETHYL PHTALATE, Diethyl phthalate, DEP, Ethyl phthalate, Anozol, Diethyl ester, Phthalic Acid Diethyl Ester, Benzene dicarboxylic acid diethyl ester 84-66-2 

Diethyl phthalate
CAS: 84-66-2
Molecular Formula: C12H14O4
Names and Identifiers

Name

Diethyl phthalate

Synonyms

DEP
Anozol
Diethyl ester
Ethyl phthalate
DIETHYLPHTALATE
Diethyl phthalate
1,2-diethyl phthalate
Phthalic Acid Diethyl Ester
diethyl1,2-benzenedicarboxylate
Diethyl-1,2-benzenedicarboxylate
1,2-benzenedioicacid,diethylester
diethyl benzene-1,2-dicarboxylate
-Benzenedicarboxylic acid diethyl ester
Benzene-1,2-dicarboxylic acid diethyl ester
Diethyl ester of 1,2-Benzenedicarboxylic acid
Diethyl phthalate, (Phthalic acid diethyl ester)

CAS

84-66-2

EINECS

201-550-6

InChI

InChI:1S/C12H14O4/c1-3-15-11(13)9-7-5-6-8-10(9)12(14)16-4-2/h5-8H,3-4H2,1-2H3

Physico-chemical Properties

Molecular Formula

C12H14O4

Molar Mass

222.24

Density

1.12 g/mL at 25 °C (lit.)

Melting Point

-3 °C (lit.)

Boling Point

298-299 °C (lit.)

Flash Point

>230°F

Water Solubility

1 g/L (20 ºC)

Solubility

It is miscible with ethanol and ether, soluble in organic solvents such as acetone and benzene, and insoluble in water.

Vapor Presure

1 mm Hg ( 100 °C)

Vapor Density

7.66 (vs air)

Appearance

Colorless transparent oily liquid

Specific Gravity 

1.118

Color

APHA: ≤15

Exposure Limit 

TLV-TWA air 5 mg/m3 (ACGIH)..

Merck

14,7371

BRN

1912500

Storage Condition

2-8°C

Stability

Stable. Combustible. Incompatible with strong oxidizing agents, strong acids, alkalies.

Sensitive

Easily absorbing moisture

Explosive Limit

0.75%, 187°F

Refractive Index 

n20/D 1.502(lit.)

MDL

MFCD00009111

Physical and Chemical Properties

Properties colorless transparent oily liquid, micro-aromatic solubility insoluble in water but soluble in ethanol, ether, acetone and other organic solvents.

Use

Used as plasticizers, solvents, lubricants, fixatives, non-ferrous or rare metal mine flotation foaming agent, gas chromatography stationary liquid, alcohol denaturant, spray insecticide. This product has good compatibility with cellulose acetate, cellulose acetate butyrate, polyvinyl acetate, cellulose nitrate, ethyl cellulose, polymethyl methacrylate, polystyrene, polyvinyl butyral, vinyl chloride-vinyl acetate copolymer and most other resins. It is mainly used as a plasticizer for cellulose resins.

Risk and Safety

Safety Description   

 24/25 - Avoid contact with skin and eyes.

UN IDs

UN 3082 9 / PGIII

WGK Germany

2

RTECS

TI1050000

TSCA

Yes

HS Code

29173400

Toxicity

LD50 i.p. in rats: 5.06 ml/kg (Singh)

Upstream Downstream Industry

Raw Materials

Phthalic anhydride Ethyl Alcohol

Introduction

Solvents for cellulose nitrate and cellulose acetate. Plasticizer. Wetting agent. Gas chromatography stationary solution (maximum service temperature 95 ℃, solvent acetone, benzene, dichloromethane, ethanol), selective retention and separation of aromatic compounds, unsaturated compounds and various oxygenates (alcohols, aldehydes, ketones, esters, etc.).

Reference Information

Henry's Law Constant

At 25 °C: 5.01, 4.54, 4.78, 4.94, 2.21, and 2.44 (x 10-5 atm?m3/mol)at pH values of 2.96, 2.98, 6.18, 6.19, 8.98, and 9.00, respectively (Hakuta et al., 1977).

LogP

2.2 at 41℃

preparation

1. The traditional synthesis method is by phthalic anhydride and anhydrous ethanol in concentrated sulfuric acid under the action of esterification, esterification liquid through neutralization, dehydration, fractionation to get the finished product. Sulfuric acid has the advantages of strong acidity, strong water absorption and low cost, but it also has oxidation, which may lead to side reactions such as sulfonation, carbonization or polymerization, so that its selectivity is poor and the reaction yield is low, and the corrosion of equipment, resulting in a large number of waste liquid,causing environmental pollution. 2. Solid acid as catalyst method: add a certain amount of phthalic anhydride and 10ml of anhydrous ethanol in a three-neck bottle equipped with a thermometer, a stirrer and a reflux condenser tube, and heat, when the anhydride solid is dissolved, add a certain amount of catalyst, carry out esterification reaction under stirring reflux for 1H, then stop stirring, install water separator, add appropriate amount of cyclohexane reflux with water, until dehydration is complete, excess ethanol and cyclohexane were distilled off, and when the temperature was raised to 100 ° C., heating was stopped, and the mixture was left to cool, to obtain a crude product. The cooled    crude product was first filtered off the catalyst, and then the product adhered to the catalyst surface was washed with a small amount of ethyl acetate and incorporated into the reaction product ~ 6. The organic layer was separated and  washed with a saturated aqueous solution of sodium chloride in portions until neutral. The aqueous layer was separated and discarded, and the organic layer was dried by adding anhydrous MgSO4 and distilled to collect a fraction at 295-298 ° C., I .e., diethyl phthalate.

Use

diethyl phthalate is commonly used as a fixative for spices, and can also be used as a plasticizer for alkyd resin, nitrile rubber and chloroprene rubber; it is also an important solvent for the intermediates of the rodenticide, the rat, and the chlorophenone. It is also used as an analytical reagent, a gas chromatography stationary liquid, a solvent for cellulose and Esters, a plasticizer, a solvent, a lubricant, fixative, foaming agent for the flotation of non-ferrous or rare metal mines, alcohol denaturant, spray insecticide. It has good compatibility with cellulose acetate, cellulose acetate butyrate, polyvinyl acetate, cellulose nitrate, ethyl cellulose, polymethyl methacrylate, polystyrene, polyvinyl butyral, vinyl    chloride-vinyl acetate copolymer and most other resins. Diethyl phthalate is mainly used as a plasticizer for cellulose resin, but it is highly volatile, which limits its wide application.

production method

the crude product is prepared by refluxing reaction of phthalic anhydride and ethanol in the presence of sulfuric acid as catalyst, the product was obtained by distillation.

category

flammable liquid

toxicity grade

low toxicity

Acute toxicity

oral-rat LD50: 8600 mg/kg; Oral-mouse LD50: 6172 mg/kg

stimulation data 

eye-rabbit 112 Mg

flammability hazard  characteristics

flammable in open flame, high temperature, strong oxidant; combustion emissions

storage and transportation characteristics   

The package is complete, light, light; The warehouse is ventilated, away from open flame, high temperature,separate from oxidant

fire extinguishing agent

foam, carbon dioxide, dry powder, sand, water mist

Occupational Standard

TWA 5 mg/m3; Tel 10 mg/m3

spontaneous combustion temperature

854 ° F.

 

 

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