English name:Cyhalofop-butyl
Cas No. 122008-85-9
Product Description:

Information:

IUPAC name : butyl (R)-2-[4-(4-cyano-2-fluorophenoxy)phenoxy]propionate   

Chemical formula: C₁₆H₁₂FNO₄

Molecular mass (g mol-1)：357.38

Physical state : White crystalline solid

Properties :

Melting point (°C) : 45.5

Bulk density : 1.17 g/cm³

Vapour pressure at 20°C (mPa)：0.053

Solubility - In water at 20°C (mg l-1) ：0.44

Solubility - In organic solvents at 20°C (mg l-1) ：n-Heptane：6060 ；Xylene：250000；Acetone ：250000；Methanol ：250000

ECOTOXICOLOGY

Mammals - Acute oral LD50 (mg kg-1) ：> 5000

Mammals - Short term dietary NOEL(mg kg-1)：3

Birds - Acute LD50 (mg kg-1)：> 2250

Birds - Short term dietary (LC50/LD50)：> 5620 mg kg feed-1

Fish - Acute 96 hour LC50 (mg l-1) ：0.79

Fish - Chronic 21 day NOEC (mg l-1)：0.13

Aquatic invertebrates - Acute 48 hour EC50 (mg l-1): > 2.7

Aquatic invertebrates - Chronic 21 day NOEC (mg l-1): 100

Earthworms -Acute 14 day LC50 (mg kg-1)> 1000

Algae - Acute 72 hour EC50, growth (mg l-1)  > 0.96

Honeybees (Apis spp.)  Contact acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1): > 100

Oral acute LD50 (worst case from 24 , 48 and 72 hour values - μg bee-1): > 100

TOXICOLOGY

Mammals - Acute oral LD50 (mg kg-1) > 5000 Rat

Mammals - Dermal LD50 (mg kg-1 body weight) > 2000 Rat

Mammals - Inhalation LC50 (mg l-1) > 5.04 Rat, 4 hr (nose only)

ADI - Acceptable Daily Intake (mg kg-1bw day-1): 0.01  Mouse 

AOEL - Acceptable Operator Exposure Level - Systemic (mg kg-1bw day-1): 0.016

Cyhalofop-methyl is the only novel herbicide with high safety to rice and environmentally friendly among aryloxyphenoxypropionate herbicides. It is mainly used for post-emergence weeding in rice seedling field, direct seeding field and transplanting field. Control effect, especially for the control of dry gold, and it can also effectively control weeds that are resistant to herbicides such as sulfonylurea amides and quinclorac, but they are resistant to sedge weeds and broad-leaved Weed is invalid