tert-Butyl peroxy-3-phenylphthalide

  • 3-tert-Butylperoxy-3-phenylphthalide
  • 3-(tert-butyldioxy)-3-phenylphthalide
  • 5-tert-Butylperoxy-2-oxo-5-phenyl-2,5-dihydro-3,4-benzofuran
  • 1(3H)-Isobenzofuranone, 3-[(1,1-dimethylethyl)dioxy]-3-phenyl-
Formula
C18H18O4
Structure

Registry Numbers and Inventories.
CAS
25251-51-8
EC (EINECS/ELINCS)
246-759-3
UN (DOT)
2596
Beilstein/Gmelin
5347960

Properties.
Formula
C18H18O4
Formula mass
298.34
Melting point, °C
282
Boiling point, °C
427
Critical temperature
645
Critical pressure
23.3
Solubility in water
Insoluble
Partition coefficient, pKow
5.54

Hazards and Protection.
Storage
Keep in a cool, dry, dark location in a tightly sealed container or cylinder. Keep away from incompatible materials, ignition sources and untrained individuals. Secure and label area. Protect containers/cylinders from physical damage.
Handling
All chemicals should be considered hazardous. Avoid direct physical contact. Use appropriate, approved safety equipment. Untrained individuals should not handle this chemical or its container. Handling should occur in a chemical fume hood.
Protection
Wear appropriate protective gloves, clothing and goggles.
Respirators
Wear positive pressure self-contained breathing apparatus (SCBA).
Small spills/leaks
ELIMINATE all ignition sources (no smoking, flares, sparks or flames in immediate area). Keep combustibles (wood, paper, oil, etc.) away from spilled material. Do not touch damaged containers or spilled material unless wearing appropriate protective clothing. Keep substance wet using water spray. Stop leak if you can do it without risk. SMALL SPILLS: Take up with inert, damp, noncombustible material using clean non-sparking tools and place into loosely covered plastic containers for later disposal.
Stability
No data.

Fire.
Fire fighting
SMALL FIRES: Water spray or fog is preferred; if water not available use dry chemical, carbon dioxide or regular foam. LARGE FIRES: Flood fire area with water from a distance. Use water spray or fog; do not use straight streams. Move containers from fire area if you can do it without risk. Do not move cargo or vehicle if cargo has been exposed to heat. Fight fire from maximum distance or use unmanned hose holders or monitor nozzles. Cool containers with flooding quantities of water until well
Fire potential
May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect.
Hazards
May explode from heat or contamination. May ignite combustibles (wood, paper, oil, clothing, etc.). May be ignited by heat, sparks or flames. May burn rapidly with flare-burning effect. Containers may explode when heated. Runoff may create fire or explosion hazard.
Combustion products
Fire may produce irritating, corrosive and/or toxic gases.
 
Special
O

Health.
Exposure effects
The toxological properties of this substance have not been fully investigated.
   Inhalation
May cause severe injury or burns.
   Skin
See Inhalation.
   Eyes
See Inhalation.

First aid
 
   Ingestion
Seek medical assistance.
   Inhalation
Move victim to fresh air. Apply artificial respiration if victim is not breathing. Administer oxygen if breathing is difficult.
   Skin
Remove and isolate contaminated clothing and shoes. Remove material from skin immediately. Immediately flush with running water for at least 20 minutes. Keep victim warm and quiet.
   Eyes
Immediately flush eyes with running water for at least 20 minutes.

Transport.
UN number
2596
Response guide
Hazard class
5.2