Polypropylene glycol, average Mn ~425

Cat.No ACM25322694-16

Basic Information Description Application Features And Benefits

CAS	25322-69-4
Catalog Number	ACM25322694-16
Synonyms	PPG, Poly(propylene oxide)
Molecular Weight	average Mn ~425
Molecular Formula	H[OCH(CH3)CH2]nOH
InChI	1S/C6H14O3/c1-5(8)4-9-6(2)3-7/h5-8H,3-4H2,1-2H3
InChI Key	DUFKCOQISQKSAV-UHFFFAOYSA-N
Density	1.004 g/mL at 25 °C
Contains	130-190 ppm proprietary phenolic antioxidant
MDL Number	MFCD00084446
NACRES	NA.23
Quality Level	200
Refractive Index	n20/D 1.447
Storage Temperature	2-8°C
Vapor Density	>1 (vs air)
Vapor Pressure	<0.01 mmHg ( 20 °C)

Description Polypropylene glycol or polypropylene oxide is a polymer of propylene glycol. Chemically it is a polyether, and more generally, it is a polyalkylene glycol.

Application PPG is used in many polyurethane formulations.
PPG is used as surfactant, wetting agent and dispersing agent in leather finishing.
PPG is also used as a tuning reference and calibrator in mass spectrometry.
PPG is used as the main ingredient in the manufacture of paintballs.

Features And Benefits The polymer is liquid at room temperature. As the molar mass increases, the solubility in water decreases rapidly. Secondary hydroxyl groups in PPG are less reactive than primary hydroxyl groups in polyethylene glycol. PPG is less toxic than PEG, so PPG is now used to produce biotech products.