Propylene Glycol 20% Inhibited

Category : Glycols

$19.36
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Propylene Glycol 20% Inhibited Current
Propylene Glycol Inhibited ACS Grade From $28.91 Propylene Glycol USP Grade From $26.45 Propylene Glycol 60% USP Grade From $19.00 Propylene Glycol 50% – USP Grade (C3H8O2) From $18.52
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Other Grades & Concentrations

Available in other grades and concentrations:

1-quart plastic bottle of Alliance Chemical Propylene Glycol Inhibited ACS Grade with a white cap and product label.
Two 1-quart Alliance Chemical Propylene Glycol Inhibited ACS Grade HDPE bottles with white caps and product labels.
Propylene Glycol Inhibited ACS Grade
From $28.91
CAS: 57-55-6 C3H8O2
1-Quart Alliance Chemical Propylene Glycol USP Grade in a white HDPE bottle with a ribbed screw cap and product label.
Two 1-quart HDPE bottles of USP-grade Propylene Glycol, ribbed grip design, and Alliance Chemical branding on blue-wave
Propylene Glycol USP Grade
From $26.45
CAS: 57-55-6 C3H8O2
Propylene Glycol 60% USP Grade
Propylene Glycol 60% USP Grade
From $19.00
CAS: 57-55-6 C3H8O2
Alliance Chemical propylene glycol 50% USP grade in clear 1 quart plastic bottle with screw cap
Alliance Chemical propylene glycol 50% USP in clear 1-quart plastic bottle with secure white cap
Propylene Glycol 50% – USP Grade (C3H8O2)
From $18.52
CAS: 57-55-6 50% C3H8O2 / 50% H2O
$19.36
Ask a question
Other Grades & Concentrations

Available in other grades and concentrations:

1-quart plastic bottle of Alliance Chemical Propylene Glycol Inhibited ACS Grade with a white cap and product label.
Two 1-quart Alliance Chemical Propylene Glycol Inhibited ACS Grade HDPE bottles with white caps and product labels.
Propylene Glycol Inhibited ACS Grade
From $28.91
CAS: 57-55-6 C3H8O2
1-Quart Alliance Chemical Propylene Glycol USP Grade in a white HDPE bottle with a ribbed screw cap and product label.
Two 1-quart HDPE bottles of USP-grade Propylene Glycol, ribbed grip design, and Alliance Chemical branding on blue-wave
Propylene Glycol USP Grade
From $26.45
CAS: 57-55-6 C3H8O2
Propylene Glycol 60% USP Grade
Propylene Glycol 60% USP Grade
From $19.00
CAS: 57-55-6 C3H8O2
Alliance Chemical propylene glycol 50% USP grade in clear 1 quart plastic bottle with screw cap
Alliance Chemical propylene glycol 50% USP in clear 1-quart plastic bottle with secure white cap
Propylene Glycol 50% – USP Grade (C3H8O2)
From $18.52
CAS: 57-55-6 50% C3H8O2 / 50% H2O

Propylene Glycol 20% Inhibited

$19.36

Commercial Fulfillment Snapshot

Buy Propylene Glycol 20% Inhibited with faster decisions and fewer back-and-forth emails.

Ships from Taylor, Texas. In-stock orders placed before 1:00 PM CT (Mon-Thu) and before 12:00 PM CT (Fri) typically ship same business day. Order online 24/7.

Email Bulk Quote Call (512) 365-6838

Technical Documents

SDS ENSDS FRSDS ESSDS JATDSCOA

Lot-specific COA is issued per shipment batch.

Who Buys This
  • HVAC contractors
  • building maintenance teams
  • hydronic system operators
  • facility engineers
Purity / Grade Guide
  • Inhibited formulation for closed-loop metal systems
  • Selected when corrosion control matters as much as freeze protection
  • Better fit than uninhibited glycol for recirculating equipment
Pack Sizes
  • 1 Quart: laboratory and testing use
  • 1 Gallon: maintenance and routine handling
  • 5 Gallon: shop and facility operations
  • 15 Gallon: mid-volume process work
  • 55 Gallon: bulk production support
  • 275 Gallon and 330 Gallon: tote-based bulk supply
SDS / COA / TDS
  • Safety Data Sheet provided
  • Technical Data Sheet provided
  • Certificate of Analysis available on request
  • Lot traceability supported through Alliance Chemical
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.

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.

Related Products

Property Value
Molecular Weight 76.09
Formula C3H8O2
Assay 19-21%
Grade Inhibited
Flash Point 104°C (pure)
Form Liquid
Solubility Fully miscible with water
Appearance Clear, colorless liquid
Melting Point -59
Boiling Point 188
Specific Gravity 1.012
Industry HVAC, Hydronic Heating, Building Systems, Process Cooling

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 a chemical compound with the molecular formula C3H8O2, registered under CAS Number 57-55-6 by the Chemical Abstracts Service (PubChem), with a molecular weight of 76.09 g/mol g/mol. Alliance Chemical supplies Propylene Glycol 20% Inhibited in Technical grade for laboratory, industrial, and commercial applications.
What are the physical properties of Propylene Glycol 20% Inhibited?
According to the NIOSH Pocket Guide to Chemical Hazards, Propylene Glycol 20% Inhibited is supplied as a clear, colorless liquid. It has a melting point of -59°C°C, a boiling point of 188°C°C, a flash point of 104°C (pure). The specific gravity is 1.012 relative to water. Solubility: Fully miscible with water.
What grade and purity of Propylene Glycol 20% Inhibited does Alliance Chemical offer?
Alliance Chemical offers Propylene Glycol 20% Inhibited in Technical grade with a purity assay of 20%. Every lot ships with a Certificate of Analysis (COA) and Safety Data Sheet (SDS) prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and GHS Revision 7. Download SDS.
What are common industrial applications of Propylene Glycol 20% Inhibited?
Propylene Glycol 20% Inhibited serves a wide range of sectors, including HVAC & Cooling.Alliance Chemical provides the documentation and quality certifications required for use in regulated environments.
What PPE is required when handling Propylene Glycol 20% Inhibited?
OSHA-mandated PPE per 29 CFR 1910.132-138:Nitrile gloves (8+ mil), safety goggles, flame-resistant clothing, grounded footwear, closed-toe chemical-resistant footwear. Respiratory protection (organic vapor cartridge) required in areas exceeding PEL/TLV per 29 CFR 1910.134. Emergency eyewash station and safety shower must be accessible within 10 seconds per ANSI Z358.1. Consult the SDS available from Alliance Chemical for complete PPE requirements.
What are the storage requirements for Propylene Glycol 20% Inhibited?
Store perOSHA 29 CFR 1910.106: Approved flammable storage cabinet, maximum 60 gallons per cabinet, grounding/bonding required. Temperature range:15-25°C. Segregate from:oxidizers, ignition sources. Maximum storage:2-3 years unopened.
What is the emergency spill procedure for Propylene Glycol 20% Inhibited?
Emergency response per EPA SPCC (40 CFR 112) and OSHA 29 CFR 1910.120: (1) Alert personnel, evacuate area to 100 feet. (2) Eliminate ignition sources if flammable. (3) Don PPE per SDS Section 8. (4) Stop leak if safe; use emergency shutoffs. (5) Contain with non-combustible absorbent materials, dike with sand/earth. (6)Absorb with vermiculite or commercial spill kits. (7) Collect in DOT-approved containers, label as hazardous waste. Check 40 CFR 302.4 for Reportable Quantity. Emergency: Chemtel 1-800-255-3924 (24/7). Non-emergency: Alliance Chemical 512-365-6838.
What is the DOT shipping classification for Propylene Glycol 20% Inhibited?
DOT Classification per 49 CFR 172.101:UN1993 (Flammable Liquid, N.O.S.), Hazard Class3 (Flammable), Packing GroupII/III. Requires: Hazmat shipping papers (49 CFR 172.200), UN specification packaging (49 CFR 173), hazmat labels (172.400). Alliance Chemical ships all orders in DOT-compliant packaging with proper documentation.
How must Propylene Glycol 20% Inhibited waste be disposed?
Disposal per RCRA (40 CFR 261-265):Characteristic waste D001 (Ignitable, flash point <60°C). Generator requirements: EPA ID number required if >100 kg/month (40 CFR 262.12). Use EPA-permitted Treatment, Storage, Disposal Facility (TSDF). Never discharge to sewer without POTW written approval (40 CFR 403). Container disposal: Triple rinse (40 CFR 261.7), offer for reconditioning/recycling. State regulations may be more stringent — check with your local environmental agency. Consult the Alliance Chemical SDS for product-specific disposal guidance.
Does Alliance Chemical provide an SDS and COA for Propylene Glycol 20% Inhibited?
Yes. Alliance Chemical provides a Safety Data Sheet (SDS) and Certificate of Analysis (COA) for every lot of Propylene Glycol 20% Inhibited. The SDS is prepared in accordance with OSHA Hazard Communication Standard 29 CFR 1910.1200 and the Globally Harmonized System (GHS) Revision 7, covering all 16 required sections including hazard identification, first aid measures, firefighting measures, handling and storage, exposure controls, and regulatory information. The SDS is available for download directly from this product page. COAs are available upon request by contacting Alliance Chemical at 512-365-6838.

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