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EC number: 211-185-4
CAS number: 632-79-1
Tetrabromophthalic anhydride is expected to rapidly hydrolyze to
tetrabromophthalic acid in the environment. TBPA acid's properties are
Environmental Fate Parameters for Tetrabromophthalic Acid using EPI
Photodegradation in Air
Overall OH rate constant: 1.0464 E-012 cm3/molecule-sec
Half-life: 10.222 days (12-hr day; 1.5E6 OH/cm3)
Program cannot estimate for this structure.
Photodegradation in Water
Photodegradation in Soil
LEVEL III Fugacity Model using Biowin Ulitmate, AOPwin
Half-life: 1440 hours
Water and Sediment
Half-life in sediment: 1.296E+004 hours
Half-life: 2880 hours
Mode of Degradation in Actual Use
STP Fugacity Model
Primary sludge: 37.88%, Waste Sludge 24.21%, Total Biodegradation 0.57%, Total Removal 62.65%, Final Water Effluent 37.35%
Linear Model: Does Not Biodegrade Fast
Non-Linear Model: Does Not Biodegrade Fast
Ultimate Biodegradation Timeframe: Months
Primary Biodegradation Timeframe: Weeks-Months
MITI Liner Model: Biodegrades Fast
MITI Non-Linear Model: Does Not Biodegrade Fast
Anaerobic Model: Biodegrades Fast
Ready Biodegradation Prediction: NO
Estimated Log BCF=0.500
Transport and Distribution
Koc may vary with pH
Henry’s Law Constant, 25°C
LEVEL III Fugacity Model
Emissions of 1000 kg/hr to air, water and soil
Air: 5.34E-007%, half-life 245 hr
Water: 7.362%, half-life 1.44E+03 hr
Soil: 82.8%, half-life 2.88E+03 hr
Sediment: 9.381%, half-life 1.3E+04
Other Distribution Data
Volatilization from Water
Log Koa (octanol/air): 16.278
Koa (octanol/air): 1.897E+016
Sorption to aerosols at25°C: Kp (particle/gas partition coef.) 0.183 m3/ug (Mackay model); 4.66E+003m3/ug (Octanol/air model); Fraction sorbed to airborne particulates (phi): 0.869 Junge-Pankow, 0.936 Mackay, and 1 Octanol/air models.
Half life: 1.253x10+007 years (River); 1.367x10+008 years (Lake)
The primary environmental compartment for TBPA-acid, the hydrolysis
product of TBPA, is expected to be soil (82.8%). Sediment and water are
the next largest expected compartments (9.38% and 7.36%, repectively).
Negligible amounts are expected to partition to air.
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