Propylene Glycol 20% Inhibited

Name: Quick Facts: Propylene Glycol 20% Inhibited
Creator: Alliance Chemical
License: https://alliancechemical.com/policies/terms-of-service

Product quick facts

CAS 57-55-6C3H8O2

Propylene Glycol 20% Inhibited (CAS 57-55-6) is a 20% Inhibited-grade liquid with molecular formula C3H8O2 and a molecular weight of 76.09 g/mol. It has a flash point of Not flammable (aqueous solution). Alliance Chemical supplies this product in 7 container sizes from 1 Quart to 330 Gallon (16 pack options) with 1-2 business day shipping from Taylor, TX on in-stock orders, plus SDS and lot-specific Certificate of Analysis.

Pack sizes 7 container sizes (1 Quart to 330 Gallon) · 16 pack options
Purity / spec 20% Inhibited
Lead time In-stock orders placed by Mon-Thu 2 PM CT / Fri 12 PM CT typically ship within 1-2 business days.
Regional availability View state-by-state shipping pages

Request Bulk Quote (512) 365-6838

Quick Answer

What is Propylene Glycol 20% Inhibited used for, and what should buyers verify before ordering?

Propylene Glycol 20% Inhibited is supplied at 20% in Inhibited grade . Buyers should confirm pack size, grade, SDS, COA needs, and freight requirements before purchase.

Assay: 20%
Grade: Inhibited

Technical Documents

Live, always-current documents. Need the Certificate of Analysis for your lot? Just ask, no charge.

Who Buys This

HVAC service contractors
Facility maintenance teams
Industrial equipment operators
Mechanical system installers

Purity / Grade Guide

Industrial & lab use
Inhibited formula for systems
COA on request, no charge
SDS with every order

Pack Sizes

1 Quart: lab & small jobs
1 Gallon: shop & maintenance
5 Gallon: production & regular use
15 Gallon: mid-volume operations
55 Gallon: bulk drum
275 Gallon: high-volume tote
330 Gallon: max-volume tote

Small Packs: UPS Ground nationwide for pints, quarts, and gallons.

LTL / FTL: ABF, SEFL, Saia, XPO, and partner carriers for pails, drums, totes, and full truckloads.

Support: Email or call for freight options, hazardous-material routing, and lead-time confirmation.

Description
Product Documents
Chemical Profile

Product Overview

Propylene Glycol 20% Inhibited is a pre-mixed aqueous heat transfer fluid formulated with 20% propylene glycol and a corrosion inhibitor package for closed-loop industrial systems. This ready-to-use dilution reduces on-site mixing errors and provides light freeze protection for HVAC loops, hydronic systems, and general process cooling where equipment protection matters as much as thermal performance. This inhibited formulation includes corrosion inhibitors to protect metal piping and heat exchange equipment in closed-loop systems.

The inhibited formulation is designed to help buffer pH and reduce corrosion on common system metals such as steel, copper, brass, and stainless steel. Compared with uninhibited glycol solutions, it is better suited for recirculating systems that need both freeze protection and longer equipment life.

Key Properties

Chemical Name: Propylene Glycol
Synonyms: Propane-1,2-diol, MPG, PG
Chemical Formula: C3H8O2
CAS Number: 57-55-6
Molecular Weight: 76.09 g/mol
Concentration: 20% Propylene Glycol Solution
Grade: Inhibited
Specific Gravity (20°C): 1.012
Boiling Point: N/A
Flash Point: N/A
Appearance: Clear, colorless liquid
Solubility: Fully miscible with water

Common Applications

Heat Transfer & Antifreeze: Non-toxic coolant for HVAC glycol loops, food processing chillers, and solar thermal systems.
Food & Beverage Processing: Humectant, solvent, and preservative in food products where low toxicity is required.
Pharmaceutical Manufacturing: Excipient and solvent for drug formulations meeting USP purity requirements.
Cosmetic Formulations: Moisturizer, emulsifier, and carrier solvent in skincare and personal care products.
Industrial Deicing: Aircraft and runway deicing fluid component where environmental safety is a priority.

Safety Precautions

Propylene Glycol solutions have a low toxicity profile and are not regulated as hazardous for transport. Handle with standard industrial hygiene practices. Store in clean HDPE or stainless steel containers in a cool, dry area away from direct sunlight and strong oxidizers.

PPE Requirements: Wear chemical-resistant gloves and safety goggles as a precaution during handling. In case of eye contact, rinse with water. In case of prolonged skin contact, wash with soap and water. Refer to the Safety Data Sheet (SDS) for detailed handling and storage information.

Shipping: Not regulated as hazardous material for transport.

Benefits

Ready-to-Use Strength: Pre-diluted to the target concentration, minimizing dilution errors and simplifying deployment.
Low-Toxicity Profile: Preferred where incidental-contact concerns rule out ethylene glycol-based alternatives.
Broad Packaging Range: Available from small containers to IBC totes for flexible supply management.

Frequently Asked Questions About Propylene Glycol 20% Inhibited

What is Propylene Glycol 20% Inhibited and what is its chemical formula?

Propylene Glycol 20% Inhibited is listed under CAS 57-55-6 (PubChem reference search). The catalog formula is C3H8O2. The listed molecular weight is 76.09 g/mol. For solutions and blends, identity values may describe a constituent; consult the product SDS for composition.

What are the physical properties of Propylene Glycol 20% Inhibited?

Catalog reference information for Propylene Glycol 20% Inhibited: form: Liquid; appearance: Clear, colorless liquid; melting point: -7 °C (freeze / crystallization onset); boiling point: ~101 °C; flash point: Not flammable (aqueous solution); specific gravity: 1.021; solubility: Fully miscible with water; reference values may describe a pure substance rather than the supplied concentration or blend. Confirm applicable conditions and specifications in the product documents; these values are not batch test results.

What grade and purity of Propylene Glycol 20% Inhibited does Alliance Chemical offer?

Alliance Chemical lists Propylene Glycol 20% Inhibited in Inhibited grade with a concentration or assay of 20%. Check the product specification for the measurement basis and acceptance limits. A grade label alone does not establish certification or suitability for a regulated application. For batch results, request a COA using the product name and lot number.

What are common industrial applications of Propylene Glycol 20% Inhibited?

Catalog industry categories for Propylene Glycol 20% Inhibited include HVAC & Cooling. To evaluate it for your process, compare the listed grade, concentration and product specifications with your requirements. Contact Alliance Chemical to confirm any application-specific documentation or certification before ordering.

What are the hazards of Propylene Glycol 20% Inhibited and where do I find handling guidance?

Per its GHS classification (SDS Section 2), Propylene Glycol 20% Inhibited the following hazard statements: NOT CLASSIFIED AS HAZARDOUS UNDER GHS BASED ON AVAILABLE DATA.. Product-specific first aid, fire-fighting, spill response, handling, storage, exposure controls/PPE, and disposal guidance are in SDS Sections 4-8 and 13 — always consult the SDS before use. Download the SDS.

How must Propylene Glycol 20% Inhibited waste be disposed?

Consult SDS Section 13 for disposal information for Propylene Glycol 20% Inhibited. Disposal requirements depend on the resulting waste, contamination and location. Have your site's responsible waste professional determine the appropriate waste classification and disposal method. View the SDS.

Does Alliance Chemical provide an SDS and COA for Propylene Glycol 20% Inhibited?

Search the document library for Propylene Glycol 20% Inhibited. The SDS is also available here. A sample COA describes specifications and does not establish the results for your shipment. To request a lot-specific COA or confirm document availability, contact Alliance Chemical with the product name and lot number.