CAS 57-55-6 · Diol · GRAS / USP
Propylene Glycol
Monopropylene Glycol (MPG) · C₃H₈O₂ · MW 76.09 g/mol
Chemical & Filtration Products of Texas supplies propylene glycol (PG) in all three primary grades — Industrial, USP Pharmaceutical, and FCC Food Grade — sourced directly from Dow. Whether you need food-safe PG for a Texas food processing facility, USP-grade glycol for pharmaceutical applications, or industrial-grade PG for HVAC or chemical blending, we stock all grades and deliver in drums, totes, and bulk tanker loads across Texas. Every order ships with full SDS documentation, lot traceability, and a Certificate of Analysis — because your compliance record matters as much as your production schedule. Serving Houston, Dallas-Fort Worth, San Antonio, Austin, and all major Texas industrial corridors from our Fort Worth distribution center.
Formula
C₃H₈O₂
Boiling Point
188.2 °C
Solubility
Fully water-miscible
Pack Sizes
Drums · Totes · Bulk
Structural Formula
1,2-Propanediol — secondary and primary hydroxyl groups on a three-carbon chain
Safety & Regulatory
- NFPA Health
- 0 — Minimal hazard
- NFPA Flammability
- 1 — Slight hazard
- NFPA Reactivity
- 0 — Stable
- OSHA PEL
- None established
- ACGIH TLV
- None established
- FDA Status
- GRAS (food) / USP (pharma)
- DOT Hazard Class
- Not regulated
- Toxicity
- Generally recognized as safe
USP/FCC grade required for food and pharmaceutical applications. Always consult the current Safety Data Sheet before handling.
Grades & Packaging
Available Grades
Pack Sizes
Physical & Chemical Properties
| Molecular Formula | C₃H₈O₂ |
| Molecular Weight | 76.09 g/mol |
| CAS Number | 57-55-6 |
| Boiling Point | 188.2 °C (370.8 °F) |
| Melting Point | −59 °C (−74.2 °F) |
| Flash Point | 99 °C (210 °F) — Combustible |
| Density | 1.036 g/cm³ at 20 °C |
| Vapor Pressure | 0.013 kPa at 20 °C |
| Solubility in Water | Miscible in all proportions |
| Viscosity | 40.4 mPa·s at 25 °C |
| Refractive Index | 1.4324 at 20 °C |
| Auto-ignition Temp. | 371 °C (700 °F) |
Industrial Applications
Food & Beverage
FCC-grade PG is a GRAS food additive (E1520) used as a humectant, solvent for flavorings, and carrier for food colors. Approved for direct food contact applications.
Pharmaceuticals
USP-grade PG is a widely used pharmaceutical excipient — solvent for oral, injectable, and topical drug formulations. Recognized as safe by FDA for pharmaceutical use.
HVAC & Heat Transfer
Non-toxic alternative to ethylene glycol in food-processing facilities, breweries, and buildings where incidental human contact is possible. Provides freeze protection to −51 °C at 60% concentration.
Animal Feed
Used as an energy source and humectant in livestock feed, particularly for dairy cattle. FCC grade required for feed applications.
Personal Care & Cosmetics
Humectant, solvent, and skin-conditioning agent in lotions, shampoos, deodorants, and cosmetics. Provides moisture retention and smooth texture.
Industrial Solvents
Carrier solvent for industrial cleaners, paint strippers, and hydraulic fluids. Industrial grade used where food/pharmaceutical purity is not required.
Why Source Propylene Glycol from Texas-Chem?
- 35+ years supplying industrial glycols to Texas manufacturers
- Industrial, USP, and FCC grades available
- Flexible packaging from 55-gal drums to bulk tanker delivery
- Competitive pricing backed by top-tier producer relationships
- Technical support and SDS documentation with every order
- Same-day quotes for standard quantities
Frequently Asked Questions
What is the difference between FCC Food Grade and industrial grade propylene glycol?▾
FCC Food Grade propylene glycol meets the purity standards of the Food Chemicals Codex and is approved for direct use in food, beverage, pharmaceutical, and cosmetic applications. Industrial-grade propylene glycol is appropriate for heat transfer fluids, antifreeze, and manufacturing processes where food or human contact does not occur. Using the wrong grade can create compliance violations or batch rejections. Chemical & Filtration Products of Texas supplies both grades with lot traceability and SDS documentation. Contact us at 855-TEX-CHEM for pricing and grade confirmation.
Is propylene glycol safe to use in food and beverage manufacturing?▾
Yes — when the correct grade is used. FCC Food Grade propylene glycol is FDA-recognized as Generally Recognized As Safe (GRAS) for use as a food additive, solvent, and humectant in food and beverage production. It must be sourced from a certified supply chain with proper documentation. Chemical & Filtration Products of Texas sources FCC Food Grade PG from top-tier manufacturers including Dow and supplies it with full lot traceability for audit compliance. Contact us at 855-TEX-CHEM for current availability.
Can propylene glycol be used as a heat transfer fluid?▾
Yes. Industrial-grade propylene glycol is widely used in closed-loop heating and cooling systems as a non-toxic heat transfer fluid alternative to ethylene glycol, particularly where incidental contact with people, food, or animals is possible. It offers a lower toxicity profile, making it the preferred choice for facilities with safety-sensitive environments. We supply propylene glycol in drum and bulk tanker quantities for heat transfer and HVAC applications. Contact us at 855-TEX-CHEM for volume pricing.
What is USP grade propylene glycol and when do I need it?▾
USP-grade propylene glycol meets the United States Pharmacopeia purity standards and is required in pharmaceutical manufacturing, injectable drug formulations, oral medications, and topical applications where a monograph-grade ingredient is specified. It has tighter purity limits than FCC Food Grade for specific contaminants. Chemical & Filtration Products of Texas supplies USP-grade PG with manufacturer documentation and lot traceability to keep your operation audit-ready. Contact us at 855-TEX-CHEM for availability.
Who manufactures the propylene glycol you supply?▾
We source propylene glycol from top-tier manufacturers including Dow — one of the world's leading PG producers. Dow-sourced propylene glycol is among the most widely recognized in the industry for consistent quality and reliable documentation. Every order we ship comes with the manufacturer's lot information, SDS, and grade certification. Contact us at 855-TEX-CHEM for current lead times and pricing.
How do I order bulk propylene glycol in Texas?▾
Chemical & Filtration Products of Texas supplies propylene glycol from single drums to full bulk tanker deliveries statewide. We deliver to manufacturing plants, food processors, water treatment facilities, and blending operations across Houston, Dallas-Fort Worth, San Antonio, and Austin. Call 855-TEX-CHEM or email [email protected] to request a quote for your required volume and grade.
What industries in Texas use propylene glycol in large quantities?▾
The largest consumers of propylene glycol in Texas include food and beverage manufacturers using it as a humectant and solvent, pharmaceutical manufacturers using USP grade in drug formulations, HVAC and facilities management companies using it in heat transfer systems, and chemical blenders formulating personal care and industrial products. Chemical & Filtration Products of Texas serves all of these industries statewide. Contact us at 855-TEX-CHEM for industry-specific grade recommendations.
Other Glycols We Carry
Ethylene Glycol (EG)
CAS 107-21-1
Diethylene Glycol (DEG)
CAS 111-46-6
Triethylene Glycol (TEG)
CAS 112-27-6
Polyethylene Glycol (PEG)
CAS 25322-68-3
From the Resources
Propylene Glycol vs. Ethylene Glycol: Industrial Buyer's Guide
Not sure which glycol fits your application? Compare toxicity, performance, cost, and industry-specific use cases side by side.
Propylene Glycol vs. Alternatives
Propylene glycol (PG) is the food-safe, low-toxicity alternative to ethylene glycol. Here's how it stacks up across key performance attributes.
| Attribute | Propylene Glycol | Ethylene Glycol | Dipropylene Glycol |
|---|---|---|---|
| Toxicity | GRAS / food-safe | Toxic — not food-safe | Low toxicity |
| Freeze Point (50% solution) | −32 °C (−26 °F) | −37 °C (−34 °F) | N/A — not used as antifreeze |
| Boiling Point | 188 °C (370 °F) | 197 °C (387 °F) | 232 °C (450 °F) |
| Primary Use | Food, pharma, HVAC, cosmetics | Antifreeze, polyester | Fragrance, cosmetics, resins |
| Grades Available | USP, FCC, Industrial | Industrial only | Industrial, fragrance |
Industries We Supply Propylene Glycol To
Food & Beverage
FCC-grade propylene glycol used as a humectant, solvent, and carrier in food processing and flavoring applications.
Propylene Glycol supply in Houston, TXPharmaceutical & Personal Care
USP-grade PG is a critical excipient in oral medications, topical formulations, and personal care products.
Propylene Glycol supply in Austin, TXHVAC & Food-Safe Refrigeration
Preferred antifreeze for food processing facilities, breweries, and any system where incidental contact with product is possible.
Propylene Glycol supply in Dallas, TXAnimal Feed & Agriculture
Used as an energy supplement and carrier in livestock feed and veterinary formulations across Texas agricultural operations.
Propylene Glycol supply in Lubbock, TX