Penoxsulam 
Action/Use:
- Herbicide
Use:
Granite*, Grasp*, Grasp* Xtra, RebelEX* for use on rice. Galleon* is an aquatic herbicide. Pindar* for use on bearing and nonbearing tree nuts. Sapphire* for use on established turfgrass.
Identification
Common Name(s): Penoxsulam (BSI, ISOPA)
Chemistry
Formula: C16H14F5N5O5S.
Properties: Melting point 212°C. Vapor pressure 9.55 x 10-11 mPa (25°C).
Mode of Action / Resistance Management
Chemical Group: Triazolopyrimidine
Mode of Action: Inhibition of acetolactate synthase ALS (acetohydoxyacid synthase AHAS)
Action Group: HRAC Group B
Environmental Guidelines
Hazards: Fish: LC50 (96 h) >101 mg/l (carp), >103 (bluegill sunfish); >102 mg/l (rainbow trout), >129 mg/l (silverside); EC50 (24 h and 48 h) >98.3 mg/l (Daphnia). Bird: LD50 >2000 (mallard duck), >2025 (bobwhite quail) mg/kg b.w. Dietary LC50 (8 d) >4310 (mallard duck), >4411 (bobwhite quail) ppm. Bee: LD50 (oral, 48 h) >110 µg/bee; (contact, 48 h) >100 µg/bee (honeybee)
Water Solubility: 5.7 ppm at pH 5, 410 ppm at pH 7 and 1,460 ppm at pH 9
Safety Guidelines
Toxicity: (Rat): Oral LD50 >5000 mg/kg. Inhalation LC50 >3.50 mg/l (Rabbit): Dermal LD50 >5000 mg/kg.
Handling/storage Cautions: Store in a cool dry area
Suppliers and Branded Products
Basic Producers:
Dow AgroSciences LLC (Granite*, Grasp*, Sapphire*)
SePRO Corp. (Galleon*)
Premix Products:
+ Cyhalofop-butyl
- Clinton* — BMC Group Co., Ltd.
- RebelEX* — Dow AgroSciences LLC
+ Oxyfluorfen
- Pindar* GT — Dow AgroSciences LLC
+ Triclopyr
- Grasp* Xtra — Dow AgroSciences LLC
