Propylene glycol is used as antifreeze agent and industrial coolant in different industries where contamination with food is possible, de-icing solutions etc. Propylene glycol is generally regarded as safe for use in food. It is used in the industries like food, beverage etc for heat transfer, also used in vehicles. Antifreeze Coolant should be efficient in transferring the heat as well as preventing scale and corrosion.

Propylene glycol [HO-CH2-CH(OH)-CH3] is pronounced as pro'puh-leen-gly'col. It is a clear, colorless, slightly syrupy liquid at room temperature. The compound may exist in air in the vapor form though it must be heated or briskly shaken to produce a vapor. It is actually a multi-variant chemical compound. Propylene glycol - in an industrial cooling and heating process terminology is referred as industrial coolant or heat transfer fluid (HTF) or the common fluid that is used in large installations for transporting heat from one place to another.

Features :

• serves as a solvent
• offers outstanding stability with high flash and boiling points
• reduces the freezing point
• increases the boiling point
• helps to bind and transport other substances (excipient)
• holds and dissolves active ingredients equally in a medium
• connects and stabilizes insoluble fluids (emulsifier)
• attracts/holds water/moisture (hygroscopic)
  

Usage :

• As an emulsification agent in Angostura and orange bitters
• As a moisturizer in medicines, cosmetics, food, toothpaste, shampoo, mouth wash, hair care and tobacco products
• As a carrier in fragrance oil
• To produce polyester compounds
• As a base in deicing solution
• In smoke machines to make artificial smoke for use in firefighters' training and theatrical productions
• As a solvent for food colors and flavorings
• As an ingredient, along with wax and gelatin, in the production of paintballs
• As a wetting agent, used to determine drying time in paints and coatings
  

A non-toxic substitute of Ethylene Glycol :

Propylene Glycol is the replacement of Ethylene Glycol in newer automotive antifreezes and de-icers in aircrafts. Like Ethylene Glycol, Propylene Glycol also has the special physical characteristics of depression of freezing point when mixed with water. It happens due to disruption of hydrogen bonding. Pure water freezes at 0OC. But aqueous solution of Propylene Glycol (10% by weight) has a freezing point of -3OC. 30% by weight aqueous solution of Propylene Glycol freezes at -12OC and a 60% by weight Propylene Glycol and water mixture can further lower down this freezing point to -51OC.

Why Glycol turned into red color ?

Because of the extensive corrosion & rust in the system metal makes the glycol turn reddish in color. At this point the glycol is fouled with iron contaminants that increase the glycol degradation rate. It is important to add corrosion inhibitor to the glycol system to avoid such degradation of glycol.

Application Areas :

Beverages & Juices, Breweries & Distilleries, Packaged Food Freezing, Canneries & Preservers, Fish Processing Units, Pharmaceutical & Bulk Drugs, Poultry Processing Industry, Thermal Storage System, Heating and Cooling Systems, Snow Melting and Refrigeration, Ice Skating Rinks, Vegetable Oil Industry, Ice Manufacturer, Cold Storage Systems etc.

Product Physio-Chemical Data :

• Form and Appearance - Clear, colorless liquid
• Assay as Propylene Glycol - 99.8%
• Specific Gravity - 1.04 (approx.)
• Molecular Wt. -  76.0548 gm/mol
• Solubility in Water - 100%
  

Handling Measures, Precaution & Storage :

Propylene Glycol is slightly hygroscopic & the storage temperature is not critical, it must be stored under conditions so that contamination with water and adsorption of moisture are prevented. It should be noted however for product quality reasons the storage temperature should not go above 40°C. At below freezing temperatures the product viscosity might become too high for transfer from the storage containers with the pumps available. PG is a stable chemical and is not expected to deteriorate significantly with time provided if it is stored as indicated. The drums should be stored in dry condition, better to use the original drums rather than the other drums and if the drums are opened then it must be closed tightly at unused situation. The chemical can be stored up to 6 months. 

_ Engine Coolant or Radiator Coolant is based on Inhibited Ethylene or Propylene Glycol solution or concentrate. These are used by all vehicles for heat transfer. Antifreeze Coolant should be efficient in transferring the heat as well as preventing scale and corrosion of the radiator and the engine cooling system.

              This coolant can also function as antifreeze in low temperature brine chilling plant application (also known as Brine). Radiator Coolant helps the engine to give optimum performance.

              Chemtex range of Industrial Coolants replaces all products of DOW FROST (Heat Transfer Fluid based on Propylene Glycol), DOW THERM (Heat Transfer Fluid based on Ethylene Glycol), NORKOOL and AMBITROL range, more economically and effectively.

              Inhibited Propylene Glycol Brine (Inhibited PG) is used as an industrial coolant, antifreeze heat transfer agent. The corrosion inhibitor package in the PG is designed to protect brass, copper, solder, steel, cast iron, aluminum and other metals commonly found in the industrial cooling and heating systems.

              The effectiveness of Inhibited Propylene Glycol Brine (Inhibited PG) in preventing corrosion has been proven in extensive laboratory and in actual service tests. Using Inhibited Propylene Glycol Brine (Inhibited PG) for heat transfer applications instead of brine solutions or uninhibited propylene glycol reduces maintenance costs and improves heat transfer efficiency.

              Chemtex's Inhibited Propylene Glycol Brine (Inhibited PG) outperforms Dowfrost and Ambitrol range of inhibited propylene glycol based heat transfer fluids
 

Applications   :        Beverages & Juices, Breweries & Distilleries, Canneries & Preservers, Packaged Food Freezing, Pharmaceutical & Bulk Drugs, Fish Processing Units, Poultry Processing Industry, Heating and Cooling Systems, Thermal Storage System, Snow Melting and Refrigeration, Ice Skating Rinks, Vegetable Oil Industry, Ice Manufacturer, Cold Storage Systems

 
Specification    :

Chemical Type  :  Inhibited Propylene Glycol Brine (Inhibited PG)
Form  :  Liquid
Appearance  :    Clear, Colorless Liquid
Assay as (HO-CH2CH2(OH)-CH3)  :   96.0% - 97.0%
Concentration of Inhibitor  :   3.0% - 4.0%
Solubility  :  Completely Soluble in Water

Brine or glycol coloring agent is a unique leak detecting instrument that is very easy and economical to use. Small amount of ALSTA GLO added to the system turns the whole glycol, brine or coolant solution to turn bright florescent green color. This color is unique in the way that it starts glowing in presence of UV light.

Now have comes two questions in mind - Why? And How? Especially when Propylene Glycol or Inhibited Propylene Glycol is used as heat transfer agent in food, beverage or brewery industries, there lays a possibility of contamination even though Propylene Glycol is harmless to our health up to a certain level. But to keep ourselves on the safer side of the problem, something has to be done to detect the leakage of Glycol from the system. But we are fortunate enough that it had already done. Chemtex’s continuous innovation blesses us with a perfect blend of Inhibited Mono Ethylene Glycol or Inhibited Propylene Glycol and a colored leak detecting media. This media turns the Glycol solution to fluorescent green or orange colored solution. So, whenever there is any leakage from Glycol systems, it will be visible during the daylight and even in the night time due to its fluorescent color.

The leak detection dye also has a very special feature that can make it very easy to detect small pinhole punctures or leakages at its very nascent stage before it takes a shape of a large puncture or burst and cause production and maintenance havoc. This special mechanism of the Brine leak detection dye is its ability to glow in the dark in presence of UV light. However, the bright green or orange color of colored Glycol remains easily detectable whenever or wherever there is a leakage and thus helps us to avoid unwanted contamination of Ethylene or Propylene Glycol especially with food items and other chemicals used in the system.

               At the last but not the least we can conclude with this belief that Chemtex is one of the leading international ISO 9001:2008 certified companies which provides its clients Inhibited Ethylene Glycol and Inhibited Propylene Glycol over the last few decades and will continue in near future. 

Inhibited Propylene Glycol is used in chillers, glycol systems, boiler systems, solar panels, and many other water based systems. It is usually produced from either propylene oxide or glycerol. For Chemtex’s Inhibited Propylene Glycol contact us at +91-33-7111-1111 or [email protected]