Propylene oxide CAS#75-56-9

Boiling point 

34 °C(lit.)

density 

0.83 g/mL at 25 °C(lit.)

vapor density 

2 (vs air)

vapor pressure 

29.43 psi ( 55 °C)

refractive index 

n20/D 1.366(lit.)

Fp 

−35 °F

storage temp. 

2-8°C

solubility 

425-450g/l

form 

Liquid

color 

Clear

Odor

Ethereal; characteristic; sweet, alcoholyc; like natural gas.

explosive limit

1.9-36%(V)

Water Solubility 

40 g/100 mL (20 ºC)

FreezingPoint 

-112.13℃

Merck 

14,7856

BRN 

79763

Henry's Law Constant

Not an environmentally important parameter because propylene oxide reacts rapidly with water

Exposure limits

TLV-TWA 50 mg/m3 (20 ppm) (ACGIH), 240 mg/m3 (100 ppm) (OSHA); IDLH 2000 ppm.

Stability:

Stable. Incompatible with acids, bases, oxidizing agents, copper, copper alloys, brass, bronze, iron, metal chlorides, peroxides and a wide variety of other materials. Reacts with compounds containing labile hydrogen. Extremely flammable - note low boiling point, low flash point and very wide explosion limits. Moisture sensitive.

InChI

1S/C3H6O/c1-3-2-4-3/h3H,2H2,1H3

InChIKey

GOOHAUXETOMSMM-UHFFFAOYSA-N

SMILES

CC1CO1

LogP

0.030

CAS DataBase Reference

75-56-9(CAS DataBase Reference)

NIST Chemistry Reference

Propylene oxide(75-56-9)

IARC

2B (Vol. Sup 7, 60) 1994

EPA Substance Registry System

Propylene oxide (75-56-9)

Safety Information

Risk Statements 

45-46-12-20/21/22-36/37/38

Safety Statements 

53-45

RIDADR 

UN 1280 3/PG 1

WGK Germany 

3

RTECS 

TZ2975000

Autoignition Temperature

430 °C

TSCA 

TSCA listed

HS Code 

2910 20 00

HazardClass 

3

PackingGroup 

I

Storage Class

3 - Flammable liquids

Hazard Classifications

Acute Tox. 3 Dermal
Acute Tox. 3 Inhalation
Acute Tox. 4 Oral
Carc. 1B
Eye Irrit. 2
Flam. Liq. 1
Muta. 1B
STOT SE 3

Hazardous Substances Data

75-56-9(Hazardous Substances Data)

Toxicity

LD50 orally in rats: 1.14 g/kg (Smyth)

IDLA

400 ppm