PROPYLENE GLYCOL USP
Propylene glycol is a humectant, which means that it is an ingredient that is added to cosmetics to increase moisture retention in skin and hair. Propylene glycol is well tolerated by the skin and shouldn't cause redness or irritation.
Application
It is used to absorb extra water and maintain moisture in certain medicines, cosmetics, or food products. It is a solvent for food colors and flavors, and in the paint and plastics industries. Propylene glycol is also used to create artificial smoke or fog used in fire-fighting training and in theatrical productions.
Dosage
According to the Material Safety Data Sheet on propylene glycol, the chemical is a strong skin irritant, and has been implicated in contact dermatitis.
Technical Specifications
| Chemical Name | : 1,2-Propanediol |
| Formula | : CH3-CH(OH)-CH2OH; C3H8O2 |
| Molecular Weight (g/mol) | : 76.10 |
| Assay | : >99.8% by weight |
| Moisture | : 0.2% by weight |
| Boiling Point, 101.3 kPa (1 atm) | : 187°C (369°F) |
| Distillation Range, 101.3 kPa (1 atm) | : 186–189°C (367°F–372°F) |
| Vapor Pressure, 25°C | : 0.017 kPa (0.13 mm Hg) |
| Freezing Point | : Super Cools |
| Pour Point | : -57°C |
| Specific Gravity | : 1.075 - 1.077 |
| Refractive Index n20/D, 20°C | : 1.4310–1.4330 |
| Viscosity, 25°C | : 48.6 centipoise (mPa.s) |
| Specific Heat, 25°C | : 2.51 J/g°K |
| Flash Point, Closed Cup | : 104°C (220°F) |
| Autoignition Temperature | : 371°C (700°F) |
| Thermal Conductivity, 25°C | : 0.2061 W/m°K |
| Electrical Conductivity, 25°C | 10 micro S/m |