Chicago house fire 7-28-13
This from Eric Haak: At approximately 8:15 Sunday morning, a fire broke out in this 25×50 1.5 story brick on the 900 block of north Harding in Chicago’s 13th Battalion.  Engine 95 was first due and reported the home to be fully involved on arrival.  There was a enclosed wood frame porch at the rear of the structure where it appeared the fire originated.  The home had been vacant for a while and had several break-ins.  The fire eventually communicated to the home to the north and caused damage to the frame dormer of a 1.5 story ordinary.  Companies working on the scene were Engines 95 and 76, Trucks 35 and 26, Truck 36 was RIT with the 12th Battalion. Eric Haak photo Eric Haak photo Eric Haak photo Eric Haak photo Eric Haak photo
Tert-Butyl peroxybenzoate (TBPB) a chemical compound from the group of peresters. It is often used as a radical initiator in polymerization reactions, such as the production of LDPE from ethylene, and for crosslinking, such as for unsaturated polyester resins.
As peroxo compound, TBPB contains about 8.16 wt% of active oxygen and has a self accelerating decomposition temperature (SADT) of about 60 °C. The SADT is the lowest temperature at which self-accelerating decomposition in the transport packaging can occur within a week, and which should not be exceeded while storage or transportation.[2] TBPB should therefore be stored between minimum 10 °C (below solidification) and maximum 50 °C. Dilution with a high-boiling solvent increases the SADT. The half-life of TBPB, in which 50% of the peroxy ester is decomposed, is 10 hours at 104 °C, one hour at 124 °C and one minute at 165 °C. Amines, metal ions, strong acids and bases, as well as strong reducing and oxidizing agents accelerate the decomposition of TBPB even in low concentrations.[ However, TBPB is one of the safest peresters or organic peroxides in handling. The main decomposition products of tert-butyl peroxybenzoate are carbon dioxide, acetone, methane, tert-butanol, benzoic acid and benzene.
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