Distributor of Propylene Glycol USP
55 gallon drums Stocking locations: Atlanta GA ,Columbus OH, Denver, CO & Houston TX

What is Propylene Glycol USP?
Propylene Glycol USP is approved for Food and Beverage Applications. USP products are certified in conformance to FDA guidelines. Propylene Glycol USP products are packaged in a class 8 clean room and contain a Product Lot number.

Is Propylene Glycol USP Food Grade?
Food grade is a term often used in describing Propylene Glycol USP. Always use a product designated with USP on the label if you are using the product in food or beverage or in applications where the Propylene Glycol may contact food.

How much Propylene Glycol USP can be added to a Food or Beverage product?
For legal reasons, we can not provide advice. If you are purchasing Propylene Glycol for a food additive application please ask an expert in the Food and Beverage field.

What is the difference between Propylene Glycol and Propylene Glycol USP?
USP is certified for food food use. Do not use straight Propylene Glycol or other grades of Propylene Glycol in food and beverage applications. Propylene Glycol USP can be substituted for Propylene Glycol.

*** Top 5 questions to ask yourself before ordering Propylene Glycol.
  1. Do I need a corrosion inhibitor with your glycol to protect against corrosion? If you have iron and other metals that may corrode, you may require a inhibited glycol product.
  2. Do I need an FDA (food grade) regulated product? FDA regulated facilities regulated certified product in case the process water stream contacts the food or beverage. This product may be a USP grade inhibited glycol or a straight Proylene Glycol USP.
  3. What is the freeze point protection required? This will tell us how much glycol vs water you need.
  4. How critical is the application? For very critical applications, you may require DI water instead of soft water.
  5. Do I need premixed glycol (example 30% premixed) or can I mix it yourself? Buying concentrated products will save you money, since you do not have to purchase and transport water. For applications, that require premixed glycol, ChemWorld does offer this product on another website.

Is Ethylene Glycol the same as Propylene Glycol?
No. Do not confuse Propylene Glycol with Ethylene Glycol. These are 2 different chemicals. Be careful when ordering any chemical. Always confirm the CAS Registration Number. There are many different grades of Glycols.


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Propylene Glycol USP

How much Propylene Glycol Antifreeze should I add to my system?
The propylene glycol freeze chart is located in the left navigation menu, but here are a few number as a guide line"
  • 30% solutions provide Antifreeze protection to 5F.
  • 40% solutions provides Antifreeze protection to -20F.
  • 50% solutions provide Antifreeze protection to -35F.
Download the Propylene Glycol Freeze Chart to determine the dilution ratio of Propylene Glycol required.

How do I check my freeze temperature of my Propylene Glycol?
There are two ways to check the freeze protection of your propylene glycol solution. The first are use nitrite residual test strips. This is more of a general range. You should not use nitrite test strips if you need the exact freeze temperature. If you require to know your exact freeze point temperature use a glycol refractometer.

What is the difference between Propylene Glycol and Inhibited Propylene Glycol?
Inhibited Propylene Glycol contains corrosion inhibitors that protect water systems from corrosion. Propylene Glycol is just pure 99.9% PG. If your facility requires FDA certification purchase USP grade Corrosion Inhibited Propylene Glycol.

What is the difference between Industrial Grade Propylene Glycol and USP?
USP Propylene Glycol meets the requirements of Industrial Grade, while Industrial Grade does not meet USP requirements.

What is the difference between Technical Grade Propylene Glycol and Industrial Grade?
These are the same products. Just 2 different ways people refer to it as.

What is HVAC grade Glycol?
Some corrosion inhibitors used in propylene glycol are silica based. Silica based corrosion inhibitors should not be used in HVAC systems. All Corrosion Inhibitors used in HVAC systems should organic based or phosphate based. At ChemWorld we only carry organic based corrosion inhibitors. When we refer to it as organic, we are not referring to the organic term commonly referenced in foods, but referenced towards ortho and organo phosphates.

Is Propylene Glycol safe to use in PVC systems?
This is a really good question. We have had many inquires about this. We do not have any actual field data to support this, but we have had many people calling and complaining over the past 2 years about PVC pipes and PVC elbows cracking after 4 to 10 years of service.  Considering the amount of complaints, this has raised a red flag on Propylene Glycol use in PVC systems.  If you have a refrigeration system that requires freeze protection and you have extensive PVC, you may consider using a solution of 50% glycerin mixed with water. Also, make sure to keep the pH neutral (7.0 to 8.0) in PVC systems. If you are reading this and have any data please email it us so we can share your findings.

What is type of Propylene Glycol is used to make Boiler Antifreeze?
Most Boiler Systems use a Corrosion Inhibited Propylene Glycol to increase heat transfer efficiency and to protect against freezing during down times. Typically, Propylene Glycol is diluted to 20 to 40% in boiler systems depending on your freeze point protection. the corrosion inhibitor used in Inhibited Glycol is good to a dilution of 20%.

I intend to use this Glycol in a hot water solar system. Are there any issues with this type application?
No, Propylene Glycol will work fine in a hot water solar system. Check with the manufacture to see what dilution they want you to keep your glycol at.

I already have some PG in the system and will be adding this PG. Is it compatible with other PG's?
Pure Propylene Glycol products are compatible with each other and in most cases the corrosion inhibitors are very similar in composition.

Do you have 15 and 30 of Propylene gallon containers as well? What are the prices (including shipping)?
When you ship 5 gallon pails, the product will ship Fedex ground. The maximum Fedex ground will ship is 80 pounds. A 15 gallon container of propylene glycol weighs 132 pounds. This means it has to ship LTL. The minimum shipping on an LTL shipment is around $100. So it may not be economical to ship 15 gallon containers. In some cases, shipping 30 gallon containers of propylene glycol may break even or may save a bit.




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Propylene Glycol

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