Hexythiazox-d11

Hexythiazox-d₁₁ is intended for use as an internal standard for the quantification of hexythiazox by GC- or LC-MS. Hexythiazox is an acaricide that induces toxicity in two-spotted spider mite (T. urticae) larvae of strains WI and AK (LC₅₀s = 0.15 and 0.58 mg AI/L, respectively) and, to a lesser extent, in strain AU (LC₅₀ = 160 mg AI/L).¹ It also induces toxicity in European red mite (P. ulmi) larvae of strains HS and US (LC₅₀s = 0.23 and 0.62 mg AI/L, respectively) but not strain CE (LC₅₀ = >1,000 mg AI/L).¹ Hexythiazox is toxic to bluegill (L. macrochirus; LC₅₀ = 3.2 mg/L) and D. magna (EC₅₀ = 0.36 mg/L) but not rats (LD₅₀ = >5,000 mg/kg).² Formulations containing hexythiazox have been used in the control of mites in agriculture.