Microbial Transformation of Phthalate Esters: Diversity of Hydrolytic Esterases - Environmental Contamination: Health Risks and Ecological Restoration - page 315

TABLE 15.1
Physical.Properties.of.Selected.Phthalate.Esters

Di(2-
Ethylhexyl)
Phthalate

Dimethyl
Phthalate

Dimethyl
Isophthalate

Dimethyl
Terephthalate

Dibutyl
Phthalate

Abbreviation DMP DMIP DMTP DEHP DBP

CAS.RN 131-11-3 1459-93-4 120-61-6 117-81-7 84-74-2

Position.of.
ester.bond

Ortho Meta Para Ortho Ortho

Molecular.
weight

194.1866 194.1866 194.1866 390.5618 278.3474

Density 1.19 1.1477 1.2 a 0.9732 1.043

Melting.
point

2°C 66°C-67°C 141°C −50°C −35°C

Boiling.point 283.7°C 124°C.at.

12.mm.Hg

288°C 386.9°C 340°C

Water.
solubility

4200.mg/L.
at.20°C b

Insoluble 28.7.mg/L.at.

20°C c

0.003.mg/L b 13.mg/L

Physical.state Colorless,.

oily.liquid.
with.a.
slight.ester.
odor

White.lake d Colorless.to.

white.
crystals

Colorless,.
oily.liquid.
with.almost.
no.odor

Colorless,.
oily.liquid.
with.a.
very.
weak,.
aromatic.
odor

Source: . http://cheminder.cambridgesoft.com/
a. http://www.chemicalland21.com/arokorhi/petrochemical/DIMETHYL%20
TEREPHTHALATE.htm
b. Staples.et.al.,. Chemosphere, 35,.667,.1997 .
c. Watanabe.and.Hamamura,. Current Opinion in Biotechnology ,.14,.289,.2003 .
d. http://www.chemicalland21.com/arokorhi/specialtychem/perchem/DIMETHYL%20
ISOPHTHALATE.htm

result.of.objective.observation,.the.methods.used.could.greatly.inluence.the.
inal.values.
A.close.relationship.exists.between.water.solubility.and.toxicity.to.organ-
isms.. Biotoxicity. of. an. organic. chemical. to. a. particular. organism. depends.
on. its. partition. coeficient. in. the. animal. or. organism. body,. namely,. K p .
( K p .=. C solvent / C water ).(Crosby.1998)..Normally,. K ow ,.partition.coeficient.of.octa-
nol.(an.organic.solvent).and.water,.is.applied.to.indicate.the.water.solubility..
The.higher.the.value,.the.lower.the.solubility..The.toxicity.of.chemicals.can.
be.measured.through.a.range.of.concentrations.to.extrapolate.the.concentra-
tion.at.which.50%.of.the.population.show.mortality.(LC 50 )..The.relationship.
between. K ow . value. and. LC 50 . was. evaluated. by. the. signiicance. of. equa-
tion. log 10 (LC 50 ).=. a . log 10 ( K ow ).+. b .. In. a. report. conducted. to. test. several. PAEs'.
toxicity,. the. slope. a . and. constant. b . were. calculated. via. linear. regression.