Propylene Glycol (MPG, PG)

Name: Propylene Glycol (MPG, PG)
Brand: RawSource

At a Glance

Material Family

Glycols & Polyols

Record Type

Pure compound

Primary Role

Moisture Control · Solvency

Functional Roles

INCI Name

PROPYLENE GLYCOL

CosIng Functions

HUMECTANTSKIN CONDITIONINGSOLVENTVISCOSITY CONTROLLING

Industries Served

Agriculture Beauty & Personal Care Coatings & Construction Food & Beverage HI&I Cleaning Oil & Gas Textiles

Applications & Use Cases

▸ Functional fluids: Antifreeze, de-icing, and heat-transfer fluid
▸ Humectant: Moisture-retention agent in formulated products
▸ Solvent: Solvent for paints, plastics, flavors, and fragrances
▸ Resins: Raw material for unsaturated polyester resins

Physical Properties

Melting Point

-60 °C

Boiling Point

188 °C at 760 mmHg

Density

1.04 at 20 °C

Solubility

≥ 100 mg/mL at 21 °C

Vapor Pressure

0.08 mmHg at 20 °C; 0.13 mmHg at 25 °C

Flash Point

99 °C

Safety & Handling

Full SDS available on request

A grade-specific Safety Data Sheet (SDS) — with the complete hazard classification, handling precautions, and transport information — is supplied with every shipment and available on request. Confirm all safety and regulatory details against the SDS for your specific grade.

Request SDS →

HS / Tariff Classification

Harmonized System (HS) Code — 6-digit international heading

2905 . 32

Chapter 29

Organic chemicals

Heading 29.05

Internationally harmonized (WCO HS)

Subheading 2905.32

6-digit international code — national tariff line adds further digits

Chemical Identity

CAS Number

57-55-6

Molecular Formula

C3H8O2

Molecular Weight

76.09 g/mol

IUPAC Name

propane-1,2-diol

INCI Name

PROPYLENE GLYCOL

PubChem CID

1030

InChI Key

DNIAPMSPPWPWGF-UHFFFAOYSA-N

Synonyms & Trade Names

propylene glycol 1,2-propanediol propane-1,2-diol 1,2-Propylene glycol 1,2-dihydroxypropane 2-Hydroxypropanol Isopropylene glycol Dowfrost Sirlene Methylethyl glycol Methylethylene glycol Monopropylene glycol Trimethyl glycol Propylene Glycol USP Solar Winter BAN alpha-Propyleneglycol Solargard P dl-Propylene glycol Methyl glycol

Full Description

Propylene glycol (CAS 57-55-6), or monopropylene glycol, is a dihydric alcohol (propane-1,2-diol). It is used as a humectant and solvent, as an antifreeze, de-icing, and heat-transfer fluid, and as a raw material for unsaturated polyester resins.

Frequently Asked Questions

What is propylene glycol used for?

Propylene glycol (CAS 57-55-6, monopropylene glycol) is a dihydric alcohol used as a humectant and solvent, as an antifreeze, de-icing, and heat-transfer fluid, and as a raw material for unsaturated polyester resins. It also serves as a solvent for paints, plastics, flavors, and fragrances.

Is propylene glycol an alcohol?

Yes. Propylene glycol is propane-1,2-diol, a dihydric alcohol (it has two hydroxyl groups), formula C3H8O2. This polyol structure is what makes it both a humectant and a water-miscible solvent.

What is the difference between propylene glycol and propanediol?

Propylene glycol is 1,2-propanediol (CAS 57-55-6), while "propanediol" usually means 1,3-propanediol (CAS 504-63-2). Both share formula C3H8O2 but the hydroxyl positions differ, changing reactivity and applications. Specify by CAS when ordering.

Is propylene glycol water soluble?

Yes, propylene glycol is fully miscible with water, which underpins its use in waterborne heat-transfer and de-icing fluids and as a coupling solvent. See the SDS for the full physical-property profile.

What is the cost of bulk propylene glycol?

RawSource prices propylene glycol (PG/MPG) by volume and packaging (drums, IBC totes, or bulk) for industrial buyers. There is no fixed list price; submit your target quantity and grade for a bulk quote, with a CoA and SDS included.

Related Products

Disclaimer. Information on this page — including properties, identifiers, hazard, transport (DOT/UN) and tariff (HS) classifications, and applications — is provided for general reference and is compiled from authoritative public sources (e.g. PubChem/ECHA, 49 CFR 172.101, the Harmonized Tariff Schedule). Values are typical and are not a guaranteed specification; the Certificate of Analysis (CoA) for the lot purchased governs. Products are sold for industrial and professional use only. Nothing here is a medical, health, or efficacy claim or advice. Always consult the current Safety Data Sheet (SDS) before handling, storage, transport or disposal, and confirm regulatory status, classification and suitability for your application and jurisdiction. Hazard, transport and tariff classifications must be verified for your specific shipment. RawSource makes no warranty, express or implied, and assumes no liability for use of this information. Trademarks. Third-party trademarks and brand names are the property of their respective owners; any reference is nominative — used only to identify a comparable product — and does not imply affiliation with, sponsorship by, or endorsement by the trademark owner.