Diethyl Phthalate (DEP)
Information, Process, Patent, Application, Functions, Companies in the field, Reports
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- Diethyl phthalate (DEP) is a
phthalate ester, namely the diethyl ester of phthalic acid. It is a
clear substance that is liquid at room temperature and which does not
occur in nature.
- Diethyl phthalate has a faint,
disagreeable odor and can be transferred from the plastics that contain
it. When burned, DEP
produces toxic gases.
- Diethyl Phthalate is used as a
solvent for nitro-cellulose and cellulose acetate in manufacturing of
varnishes & paints and also in perfumery as a fixative and solvent.
- Diethyl phthalate is produced
by the reaction of phthalic anhydride with ethanol in the presence of a
catalytic amount of concentrated sulfuric acid.
- Diethyl phthalate is found in
certain bath preparations, fragrance products, deodorants, lotions, and
other skin care products. The highest reported concentration of use of
Diethyl phthalate is 11 % in perfumes.
- Diethyl phthalate is used in a
wide range of consumer goods. It has been the subject of great public
concern in recent years.
- Diethyl phthalate is used as a
plasticizer for cellulose ester plastic films and sheets
(photographic, blister packaging, and tape applications) and molded and
(consumer articles such as toothbrushes, automotive components, tool
handles, and toys).
- Diethyl phthalate was reported
as an ingredient in 67 cosmetic formulations at concentrations ranging
from ≤0.1 % to 25-50%. These cosmetics included bath preparations (oils,
tablets, and salts), eye shadows, toilet waters, perfumes and other
fragrance preparations, hair sprays, wave sets, nail polish and enamel
removers, nail extenders, nail polish, bath soaps, detergents,
aftershave lotions, and skin care preparations.
- If diethyl phthalate contacts
the skin, workers should flush the affected areas immediately with
plenty of water for 15 minutes, followed by washing with soap and water.
- Diethyl Phthalate is an
artificial chemical, so it is not subject to rancidity the way natural
oils such as almond oil or olive oil are. Thus a diethyl phthalate
based "oil" will have a very long shellfire.
- Diethyl Phthalate acts as a
more efficient "spreader" than natural oils, it is
a more economical carrier for essential oils (natural or artificial)
than a natural oil would be. With diethyl phthalate, a manufacturer
can use less scent per ounce of finished product, saving money.
- Recent studies show that DEP, a
phthalic acid ester (PAE), is enzymatically hydrolyzed to its monoesters
by pancreatic cholesterol esterase (CEase) in pigs and cows.
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