Dipropylene Glycol is a colourless, viscous, practically non-toxic
and slightly
hygroscopic liquid; melting point -78 C, boiling point 231 C, specific gravity
1.023. It is a isomer mixture of 1,1'-Oxybis(2-propanol)
(cas no.108-61-2),
2-(2-Hydroxypropoxy)-1-propanol (106-62-7) and 2,2'-Oxybis(1-propanol) (110-98-5).
Dipropylene glycol is miscible in water, alcohols, esters
and almost organic solvents and various vegetable oils.
It is produced
during the manufacture of propylene glycol from propylene oxide along with tripropylene glycol and higher glycols.
Dipropylene Glycol is used as a solvent, coupling agent
and chemical intermediate. Dipropylene glycol is used
as a component in the
production of unsaturated polyester resins, alkyd resins,
polyurethane
polyols, textile auxiliaries and
Dibenzoate
plasticisers.
It is an ingredient of cutting oils,
functional
fluids, industrial
soaps, agricultural insecticidal formulations, defoamers, cosmetics
and fragrances.
It is used an additive for carburettor fuels as
a lubricant and anti-freezing agent. Dipropylene glycol is used as a
solvent for printing inks, cellulose acetate, nitrocellulose, lacquers and
coatings. In the
refinery industry, it is used used as an extraction solvent to extract aromatics.
SALES
SPECIFICATION
APPEARANCE
clear
liquid
ASSAY
99.0%
min
COLOR,
APHA
10
max
CHLORIDE
5ppm
max
ACIDITY
0.01%
max
WATERR
0.1%
max
TRANSPORTATION
PACKING
200kgs
in drum
HAZARD
CLASS
Not regulated
UN
NO.
GENERAL
DESCRIPTION OF PROPYLENE GLYCOL
Glycol: any of a class of organic chemicals characterized by having separate two
hydroxyl (-OH) groups, contribute to high water solubility, hygroscopicity and
reactivity with many organic compounds, on usually linear and aliphatic carbon
chain. The general formula is CnH2n(OH)2 or
(CH2)n(OH)2. The wider meaning names
include diols, dihydric alcohols, and dihydroxy alcohols. Polyethylene glycols
and polypropylene glycols are sometimes called polyglycols which are derived by
polymerization of ethylene oxide and propylene oxide respectively. Polyethylene
glycols are water-soluble at all molecular weights, but polypropylene glycols
become increasingly less water-soluble at high molecular weights. Mono-, di- and
tripropylene glycol, the first three members of a homologous series of propylene
glycol, are completely water and ethanol soluble; miscible with most organic
solvents including acetone, chloroform and some essential oils; soluble in 12
parts of ether. Propylene glycol is an odorless and colorless liquid; boiling
point 188 C, freezing point -39 C. Propylene glycol is prepared by hydrolysis of
propylene oxide. Large amount of propylene glycol is used in the plastics
industry for the manufacture of polyester fibers and alkyd resins. It is
used as a main ingredient in automobile antifreeze and engine-cooling liquids
and in brake and hydraulic fluids due to its useful properties of low freezing
point, involatility and low corrosive activity. It is used in the preparation of
body-care surfactants. Propylene glycol is replacing ethylene glycol and ethanol
as it is less toxic than ethylene glycol. Propylene glycol is described as a
"generally recognized as safe for use in food, cosmetics, and medicines" by
FDA. Propylene glycol USP grade is used as a non-toxic antifreeze in breweries
and dairies. It is used as a humectant in foods and cosmetics. It is used as a
solvent for colouring or flavouring agents as well as in many
oral, injectable or topical pharmaceuticals. Its
antibacterial property is applied in the preparation of sanitizing lotions.
