DIMETHYL PHTHALATE

PRODUCT IDENTIFICATION
CAS NO 131-11-3

DIMETHYL PHTHALATE
EINECS NO. 205-011-6
FORMULA C6H4(COOCH3)2
MOL WT. 194.19
H.S. CODE 2917.34

TOXICITY

 Oral rat LD50: 6800 mg/kg
SYNONYMS Benzenedicarboxylic acid, dimethyl ester; DMP;
1,2-dimethyl phthalate; Dimethyl 1,2-benzendicarboxylate; Dimethyl 1,2-Benzenedicarboxylate; Dimethyl benzeneorthodicarboxylate; DMP; Phthalic acid dimethyl ester; Dimethylphthalat (German); Ftalato de dimetilo (Spanish); Phtalate de diméthyle (French); Mipax; Dimethyl o-phthalate;
SMILES  

CLASSIFICATION

 

PHYSICAL AND CHEMICAL PROPERTIES
PHYSICAL STATE

clear oily liquid
MELTING POINT 2 C
BOILING POINT

283 - 284 C
SPECIFIC GRAVITY 1.19
SOLUBILITY IN WATER Slightly soluble
pH

 
VAPOR DENSITY 6.7
HENRY'S LAW

460 C
NFPA RATINGS Health: 1; Flammability: 1; Reactivity: 0

REFRACTIVE INDEX

1.512
FLASH POINT 146 C
STABILITY Stable under ordinary conditions

GENERAL DESCRIPTION AND APPLICATIONS
Phthalates are by far the most widely used plasticisers, primarily to make soft and flexible polyvinyl chloride (PVC) for the applications in the industry of automotive, building & construction material, cable, flooring, medical device and toys. Phthalates make the long polyvinyl molecules to slide against one another. Minor quantity of phthalates are used in adhesives, caulk, sealants, paint to improve work performance. Small molecule phthalates are used as solvents in perfumes to provide longer linger longer and in nail polish to prevent chipping. They are also used as ingredients of insect repellents, as solvents in lacquer and pesticides, and as dye carrier. They are used as textile lubricating agents and as solid rocket propellents. Phthalates are produced by the reaction of phthalic anhydride with appropriate alcohols from methanol up to isodecanol (C13), either as a straight chain or with some branched in the presence of concentrated sulphuric acid as a catalyst. Excess alcohols are recovered and recycled and phthalates are purified by vacuum distillation and/or activated charcoal. A wide range of phthalates of varying chain length and structure provides each adequate properties and cost-effective for various processing and mechanical requirements. C8 - C9 phthalates, such as di-2-ethyl hexyl phthalate (DEHP or called DOP), diisodecyl phthalate (DIDP) and diisononyl phthalate (DINP) are the most widely used general purpose phthalates. DOP is the dominant plasticizer used in PVC, providing low cost. Short chain phthalates (C3 - C7) are used when rapid setting and stain resistance is required. 2-Ethyl hexanol, produced by the dimerisation of butyraldehyde obtained from propylene, is cheaper than isononyl alcohol which are prepared by the carbonylation of an olefin. Long chain phthalates (C11 - C13) are used when high temperature stability is required. C1 and C2 phthalates are used as solvents. Special phthalates which contain aromatic ring in the side chain are used when fast-fused is required. Diallyl phthalate is used as a crosslinking agent, plasticizer or dying carrier for polyesters. Examples of common phthalates include:

Plasticizer

CAS #

FORMULA & Mol weight
Dimethyl phthalate (DMP)131-11-3C6H4(COOCH3)2 194.19
Diethyl phthalate (DEP)84-66-2C6H4(COOC2H5)2 222.24
Diallyl Phthalate (DAP)131-17-9C6H4(COOCH2CH=CH2)2 246.26
Di-n-propyl phthalate (DPP)131-16-8C6H4(COOCH2CH2CH3)2 250.29
Di-n-butyl phthalate (DBP)84-74-2C6H4[COO(CH2)3CH3]2 278.35
Diisobutyl phthalate (DIBP)84-69-5C6H4[COOCH2CH(CH3)2]2 278.35
Butyl cyclohexyl phthalate (BCP) 84-64-0CH3(CH2)3OOCC6H4COOC6H11 304.39
Di-n-pentyl phthalate (DNPP)131-18-0C6H4[COO(CH2)4CH3]2 306.40
Dicyclohexyl Phthalate (DCP)84-61-7C6H4(COOC6H11)2 330.42
Butylbenzyl phthalate (BBP)85-68-7CH3(CH2)3OOCC6H4COOCH2C6H5 312.36
Di-n--hexyl phthalate (DNHP) 84-75-3 C6H4[COO(CH2)5CH3]2 334.45
Diisohexyl phthalate (DIHxP) 146-50-9 C6H4[COOCH2CH(CH3)4]2 334.45
Diisoheptyl phthalate (DIHpP)41451-28-9C6H4[COOCH2CH(CH3)5]2 362.51
Butyl decyl phthalate (BDP) 89-19-0 CH3(CH2)3OOCC6H4COO(CH2)9CH3 362.51
mixture of C7 - C11 alkyl esters 39393-37-8

 

Di-(2-ethylhexyl) phthalate (DEHP or DOP)117-81-7C6H4[COOCH2CH(C2H5)(CH2)3CH3]2 390.56
Di(n-octyl) Phthalate (DNOP)117-84-0C6H4[COO(CH2)7CH3]2 390.56
Diisooctyl phthalate (DIOP)27554-26-3C6H4[COOCH2CH(CH3)6]2 390.56
mixture of C8 - C10 branched alkyl esters (C9 rich)68515-48-0

C6H4(COOC9H19)2 418.62

n-Octyl n-decyl phthalate (ODP)119-07-3CH3(CH2)7OOCC6H4COO(CH2)9CH3 418.62
Diisononyl phthalate (DINP)28553-12-0C6H4(COOCH2CH(CH3)7)2 418.62
Diisodecyl phthalate (DIDP)26761-40-0C6H4(COOCH2CH(CH3)9)2 446.67
mixture of C9 - C11 branched alkyl esters (C10 rich) 68515-49-1

C6H4(COOC10H21)2 446.67

Diundecyl phthalate (DUP)3648-20-2C6H4[COO(CH2)10CH3]2 474.72
Diisoundecyl phthalate (DIUP) 85507-79-5 C6H4[COOCH2CH(CH2)9]2 474.72 
Ditridecyl phthalate (DTDP)119-06-2C6H4[COO(CH2)12CH3]2 530.83
Diisotridecyl phthalate (DITCP)68515-47-9 C6H4[COOCH2CH(CH2)11]2 530.83
SALES SPECIFICATION

APPEARANCE

clear oily liquid

ESTER VALUE

574 ± 3
REFRACTIVE INDEX

1.512 ± 0.002 at 20 C [ASTM D1045]
COLOR 30max , Pt/Co scale [ASTM D1045]

DENSITY

1.188 ± 0.003 g/cm3 [ASTM D1045]

WATER

0.15% max [ASTM D1364]

PURITY

99.0% min

TRANSPORTATION
PACKING

200kgs in drum, bulk
HAZARD CLASS 9 (Packing Group: III)   
UN NO. 3082
OTHER INFORMATION
Hazard Symbols: XI, Risk Phrases: 36/37, Safety Phrases: 26-39