Propylene glycol (PG) 
Property 
CAS No.: 57-55-6
Formula: C3H8O2
Structural formula:

It is a colorless liquid with steady viscosity and good water absorption. It is nearly odorless, uninflammable and minutely toxic. Its molecular mass is 76.09.  Its viscosity (20oC), specific heat capacity (20oC) and latent heat of vaporization (101.3kpa) are respectively 60.5mpa.s, 2.49KJ/(kg. oC) and 711KJ/kg. It can be mixed and solved with alcohol, water and various organic agents.
Application
PG is the raw material for preparing unsaturated polyester resin, antifreeze, etc.It is also a moisture preserving agent for tobacco, cosmetic, etc. Besides, it is a good solvent in coating, paints, and others.
Specifications (It conforms to the Quality System Standard: ISO9001: 2000):

Index	High Grade	Technical Grade
PG content % ≥	99.7	99.5
Moisture %     ≤	0.10	0.20
Color  (Pt-Co) No. ≤	10	16
Relative density d2020 g/cm3	1.035~1.038	1.035~1.040
Index of refraction(nd20)	1.431-1.435	1.428-1.435
Acidity(as acetic acid), % ≤	0.01	0.02
Distillation range(IBP-DP) oC	184~190	183~190
Appearance	Colorless, viscous and transparent liquid, no mechanical impurity

 

Packing, Storage and Transportation:
It can be packed by ISO tank, galvanized iron drum(net weight 215kgs), plastic drum, IBC or flexitank, etc.
This product should be stored in cool and windy special warehouse far from fire and transported as a general chemical product.