Styrene oxide

  • Phenylethylene oxide
  • Phenyl oxirane
  • Styrene epoxide
  • Styryl oxide
  • (Epoxyethyl)benzene
Formula
C8H8O
Structure
Description
Clear colorless straw-colored liquid with a sweet pleasant odor.
Uses
Used largely as intermed in production of styrene glycol & its derivatives.

Registry Numbers and Inventories.
CAS
96-09-3
EC (EINECS/ELINCS)
202-476-7
EC Index Number
603-084-00-2
EC Class
Carcinogenic Category 2; Harmful; Irritant
R 45 21 36
RTECS
CZ9625000
RTECS class
Tumorigen; Mutagen; Reproductive Effector
UN (DOT)
2436
Beilstein/Gmelin
108582
Beilstein Reference
5-17-01-00577
Swiss Giftliste 1
G-2110
Canada DSL/NDSL
DSL
US TSCA
Listed
Austrailia AICS
Listed
New Zealand
Listed
Japan ENCS (MITI)
Listed

Properties.
Formula
C8H8O
Formula mass
120.15
Melting point, °C
-37
Boiling point, °C
194.1
Vapor pressure, mmHg
0.3 (25 C)
Vapor density (air=1)
4.14
Odor Threshold Odor threshold 0.063 ppm
Density
1.0633 g/cm3 (0 C)
Solubility in water
Slightly soluble
Viscosity
1.99 cp at 20C
Refractive index
1.536 (20 C)
Partition coefficient, pKow
1.61

Hazards and Protection.
Storage
Keep away from heat, sparks, and flame. Keep away from sources of ignition. Store in a tightly closed container. Store in a cool, dry, well-ventilated area away from incompatible substances.
Handling
Wash thoroughly after handling. Remove contaminated clothing and wash before reuse. Use only in a well ventilated area. Avoid contact with eyes, skin, and clothing. Empty containers retain product residue, (liquid and/or vapor), and can be dangerous. Keep container tightly closed. Avoid contact with heat, sparks and flame. 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 appropriate protective clothing to prevent skin exposure.
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.
Disposal code
1
Stability
Stable under normal temperatures and pressures.
Incompatibilities
Oxidizing agents
Decomposition
Carbon monoxide, irritating and toxic fumes and gases, carbon dioxide.

Fire.
Flash Point,°C
84
Autoignition, °C
435
Upper exp. limit, %
22
Lower exp. limit, %
1.1
Fire fighting
Wear a self-contained breathing apparatus in pressure-demand, MSHA/NIOSH (approved or equivalent), and full protective gear. During a fire, irritating and highly toxic gases may be generated by thermal decomposition or combustion. Use water spray to keep fire-exposed containers cool. Combustible Liquid. Containers may explode when heated. To extinguish fire, use water, dry chemical, chemical foam, or alcohol-resistant foam. Use water spray to cool fire-exposed containers. Cool containers with flooding quantities of water until well after fire is out.
Fire potential
This chemical is combustible.
Hazards
Vapors may form explosive mixtures with air. Vapors may travel to source of ignition and flash back. Most vapors are heavier than air. They will spread along ground and collect in low or confined areas (sewers, basements, tanks). Vapor explosion hazard indoors, outdoors or in sewers.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
Health
1
 
Flammability
2
 
 
Reactivity
0
 

Health.
Carcinogin
I-2A, N-2, CP65
Poison_Class
4
Exposure effects
Central nervous system depression occurs in serious exposures.
   Ingestion
May cause irritation of the digestive tract. May be harmful if swallowed.
   Inhalation
May cause respiratory tract irritation.
   Skin
Causes skin irritation. May cause skin sensitization, an allergic reaction, which becomes evident upon re-exposure to this material. May be harmful if absorbed through the skin.
   Eyes
Causes eye irritation. May cause eye injury.

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
Remove from exposure to fresh air immediately. If not breathing, give artificial respiration. If breathing is difficult, give oxygen. Get medical aid.
   Skin
Get medical aid. Flush skin with plenty of soap and water for at least 15 minutes while removing contaminated clothing and shoes.
   Eyes
Immediately flush eyes with plenty of water for at least 15 minutes, occasionally lifting the upper and lower eyelids. Get medical aid immediately.

Transport.
UN number
2436
Response guide
Hazard class
3
Packing Group
II
 
USCG CHRIS Code
SRO
 
HS Code
2910 90 00