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EC number: 284-660-7
CAS number: 84961-70-6
Studies show that HAB is generally considered to be non-toxic to aquatic
organisms at the limits of water solubility. Short-term fish studies
show LC50 values greater than the Water Accommodated Fraction (WAF) or
the highest nominal concentrations. An extended (14-day) acute study
with fish exposed to LAB, the most water soluble component of HAB,
resulted in a NOEC greater than 10 µg/L (0.010 mg/L), the highest
concentration tested using a water accommodated fraction. Acute studies
with Daphnia also demonstrated that EC50 values were greater than the
limits of water solubility. A 21-day chronic study with Daphnia exposed
to LAB, the most water soluble component of HAB, still resulted in an
EC50 of 0.012 mg/L and a NOEC of 0.0075 mg/L. While this latter value
exceeds the criteria, it was accomplished only by testing the most water
soluble component of HAB and then further artificially enhancing
solubility through use of acetone as a solvent.
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