1,3-Propylene glycol

  • Propane-1,3-diol
  • 1,3-Dihydroxypropane
  • 2-Deoxyglycerol
  • PG
  • Trimethylene glycol
Formula
HOCH2CH2CH2OH
Structure
Description
Colorless to pale yellow, viscous liquid, odorless, hygroscopic.
Uses
Intermediate in manufacture of polyesters and other products; by-product in the manufacture of glycerin through the saponification of fat; used to lower the freezing point of water

Registry Numbers and Inventories.
CAS
504-63-2
EC (EINECS/ELINCS)
207-997-3
RTECS
TY2010000
RTECS class
Mutagen
Merck
12,9845
Beilstein/Gmelin
969155
Beilstein Reference
4-01-00-02493
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed
Korea ECL
Listed

Properties.
Formula
C3H8O2
Formula mass
76.10
Melting point, °C
-32
Boiling point, °C
214
Vapor pressure, mmHg
0.075
Saturation Concentration
Low. Probably less than 260 ppm at 20 C (analogy to propylene glycol).
Critical temperature
449
Critical pressure
62.18
Density
1.0597 g/cm3 (20 C)
Solubility in water
Soluble
Viscosity
48.45 cp (20.25 C)
Surface tension
51.144 g/s2 (50 C)
Refractive index
1.4398 (20 C)
Dielectric constant
1.3 (59 C)
Heat of fusion
7.1 kJ/mol
Heat of vaporization
72.4 kJ/mol
Heat of combustion
-1843 kJ/mol

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Store in a cool, dry place. Store in a tightly closed container. Flammables-area.
B3
Handling
Wash thoroughly after handling. Use only in a well ventilated area. Avoid contact with skin and eyes. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Avoid ingestion and inhalation. Do not pressurize, cut, weld, braze, solder, drill, grind, or expose empty containers to heat, sparks or open flames.
Protection
Eyes: Wear appropriate protective eyeglasses or chemical safety goggles as described by OSHA's eye and face protection regulations in 29 CFR 1910.133 or European Standard EN166. Skin: Wear appropriate protective gloves to prevent skin exposure. Clothing: Wear a chemical apron. Wear appropriate protective clothing to minimize contact with skin.
Respirators
Follow the OSHA respirator regulations found in 29CFR 1910.134 or European Standard EN 149. Always use a NIOSH or European Standard EN 149 approved respirator when necessary.
Small spills/leaks
Absorb spill with inert material, (e.g., dry sand or earth), then place into a chemical waste container. Clean up spills immediately, using the appropriate protective equipment. Remove all sources of ignition. Use a spark-proof tool. Provide ventilation.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Strong oxidizing agents, acid chlorides, acid anhydrides, chloroformates, reducing agents.
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
140
Autoignition, °C
405
Upper exp. limit, %
16.6
Lower exp. limit, %
2.6
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. Use water spray to keep fire-exposed containers cool. Containers may explode in the heat of a fire. Combustible Liquid. To extinguish fire use water spray, dry chemical, carbon dioxide, or chemical foam. Cool containers with flooding quantities of water until well after fire is out.

Health.
Exposure effects
   Ingestion
May cause irritation of the digestive tract. May cause central nervous system depression.
   Inhalation
May cause respiratory tract irritation. May cause effects similar to those described for ingestion.
   Skin
May cause skin irritation.
   Eyes
May cause eye irritation.

First aid
 
   Ingestion
If victim is conscious and alert, give 2-4 cupfuls of milk or water. Never give anything by mouth to an unconscious person. Get medical aid immediately.
   Inhalation
Get medical aid immediately. Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen.
   Skin
Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes. Get medical aid if irritation develops or persists. Wash clothing before reuse.
   Eyes
Flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid.

Transport.
20. Alcohols. Glycols
HS Code
2905 39 80