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202339

Poly(propylene glycol)

average Mn ~2,000

Synonym(s):

PPG, Poly(propylene oxide)

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About This Item

Linear Formula:
H[OCH(CH3)CH2]nOH
CAS Number:
25322-69-4
NACRES:
NA.23
PubChem Substance ID:
24852056
UNSPSC Code:
12162002
MDL number:
MFCD00084446
Vapor pressure:
<0.01 mmHg ( 20 °C)
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vapor density

>1 (vs air)

Quality Segment

200

vapor pressure

<0.01 mmHg ( 20 °C)

mol wt

average Mn ~2,000

contains

130-190 ppm proprietary phenolic antioxidant

feature

hydrophobic

refractive index

n20/D 1.451

viscosity

300 cSt(25 °C)(lit.)

hydroxyl value

56 mg KOH/g

density

1.005 g/mL at 25 °C

SMILES string

CC(O)CO

InChI

1S/C6H14O3/c1-5(8)4-9-6(2)3-7/h5-8H,3-4H2,1-2H3

InChI key

DUFKCOQISQKSAV-UHFFFAOYSA-N

General description

Poly(propylene glycol) (PPG) is a polyether. It is prepared by ring-opening polymerization of propylene oxide. PPG is less toxic and used as a dispersant in leather finishing, as a surfactant, wetting agent, and in drug formulations.

Application

Poly(propylene glycol) can be used as a:
  • Corrosion inhibitor for mild steel in acid solution.
  • Starting material to synthesize epoxy resin/polyurethane hybrid networks via frontal polymerization.
It can also be used to prepare poly(PEG/PPG/PTMC urethane) thermogels for sustained release of doxorubicin.

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Storage Class

10 - Combustible liquids

wgk

WGK 1

flash_point_f

445.0 °F - closed cup

flash_point_c

229.44 °C - closed cup

ppe

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