Propylene Glycol (FFG)
Propylene Glycol (FFG)
1,2 -Propanediol/2-Hydroxypropanol/1,2- Dihydroxypropane
Propylene Glycol (Food & Flavor Grade) play a significant role in industry due to their wide range of practical applications. It is an organic compound having molecular formula Propylene Glycol (Food & Flavor Grade) chemistry centers on the two hydroxyl (OH) groups that characterize them as glycols. They, therefore, have intermediate properties between alcohols, with a single hydroxyl group and glycerin with its three hydroxyl groups. Likewise, the solubility characteristics of glycols tend to be between those of the simple
alcohols and glycerin. Propylene Glycol (Food & Flavor Grade) are liquids with high boiling and low freezing points, which permit volume storage in a wide range of climates, usually without special insulation or heating requirements. Vent losses are minimal since their vapor pressures are relatively low, and glycols are easily pumped and metered in industrial processes. Propylene Glycol is aliphatic organic compounds having two hydroxyl groups per molecule. PG resemble water in that they are essentially clear, colorless liquids with
practically no odor. PG are excellent solvents for many organic compounds and are completely water-soluble. Since they can undergo chemical reactions on one or both hydroxyl groups, they are important as chemical intermediates.
Application
• Antifreeze/Coolant Formulations
• Heat Transfer Fluids
• Solvents
• Food
• Flavours and Fragrances
• Cosmetics and Personal Care Products
• Pharmaceuticals
• Chemical Intermediates
• Hydraulic Fluids
• Plasticizers
Chronic Oral Toxicity
Glycols vary considerably in chronic oral toxicity. Propylene glycol (PG) toxicity is especially low in this respect; studies in which rats were provided with drinking water containing as much as 10% propylene glycol over a period of 140 days showed no apparent ill effects. Other investigations have revealed that rats can tolerate up to 4.9% PG in the diet for 24month periods without significant effect on growth rate; however, minor liver damage was observed. Because of its low chronic oral toxicity, PG is generally considered safe for use in foods and pharmaceuticals.
Vapor Inhalation and Eye Exposure
Inhalation of the vapors of propylene glycol (PG) appears to present no significant hazard in ordinary applications. However, limited human experience indicates that breathing of mists of propylene glycols may be irritating to some individuals.
Prolonged inhalation of saturated vapors of PG have produced only minor effects in animals (irritation). However, such concentrations may be irritating to the upper respiratory tract and eyes of humans.
Therefore, breathing spray mists of these materials should be avoided. In general, OMPL does not support or recommend the use of our glycols in applications where breathing or human eye contact with the spray mists of these materials is likely, such as fogs for theatrical productions or antifreeze solutions for emergency eye wash stations.
Physical Properties of Propylene Glycol(FFG)
Molecular Weight : 76.1
Appearance : Clear, Colourless viscous liquid. Hygroscopic
Purity : Not less than 99.5%
Specific gravity(20oC) : 1.036 min
Boiling Point : 186oC
Freezing Point : -59.4oC
Viscosity(20oC) : Not less than 50.0 mPa.S
Refractive Index 1.431-1.433
Solubility in water : Completely miscible in all proportion
Specific Heat : 2.48 KJ/Kg/oC
Thermal Conductivity(20oC) : 0.187 W/m/oC
Electrical Conductivity at 20oC : 4.41 μS/m
The above typical properties are published as a guide to potential users of the product.
Storage
Propylene Glycol is hygroscopic in nature and must be stored under condition such that contamination is prevented. The storage temperature is not critical, in that there will be no hazardous condition created by storage of this product at any ambient temperature like to be encountered. At below freezing temperature viscosity of Propylene Glycol become too high for transfer from the storage containers with the pumps.
Propylene Glycol should be kept in HDPE barrels/container, non-rusted stainless steel. Hoses should be of Polypropylene or Stainless steel. Barrels must be stored in dry condition away from sources of direct heat/sun light. Opened container/barrels must be reclosed tightly immediately after drawing out the glycol.
Packing
It is available in 215kg HDPE barrel/50kg HDPE Jar.
Shelf Life
24 months if stored properly.