Chemical Identification
Common Name
Clomazone
中文通用名
异噁草松
IUPAC
2-(2-chlorobenzyl)-4,4-dimethyl-1,2-oxazolidin-3-one
or
2-(2-chlorobenzyl)-4,4-dimethylisoxazolidin-3-one
CAS
2-[(2-chlorophenyl)methyl]-4,4-dimethyl-3-isoxazolidinone
CAS No.
81777-89-1
Molecular Formula
C12H14ClNO2
Molecular Structure
Category
Activity
Herbicide
Premix
Bensulfuron-methyl+pretilachlor+clomazone
Acetochlor+clomazone
Clomazone+Quizalofop-P-ethyl+Fomesafen
Propanil+Clomazone
Pyrazosulfuron-ethyl+Clomazone+Pretilachlor
Pyrazosulfuron-ethyl+Clomazone+Butachlor
Pretilachlor+Oxadiargyl+Clomazone
Pretilachlor+Oxadiazon+Clomazone
Pyrazosulfuron-ethyl+Clomazone+Pendimethalin
Cyhalofop-butyl+Clomazone+Fluroxypyr-meptyl
Emulsifiable concentrate, micro-encapsulated. Premix Parters: acetochlor flumetsulam; benazolin; 2,4-D; 2,4-D dicamba; flumetsulam; fluroxypyr; MCPA; picloram; triclopyr.
Physical Properties
Light brown viscous liquid. Specific gravity 1.192 at 20°C. Vapor pressure 1.92 x 10-2 Pa at 25°C, (1.44 x 10-4 mmHg).
Toxicology
Oral:Acute oral LD50 for male rats 2077, female rats 1369 mg/kg. Percutaneous:Acute percutaneous LD50 for rabbits >2000 mg/kg. Practically non-irritating to eyes (rabbits). Inhalation: LC50 (4 h) for rats 4.8 mg/l. Phytotoxicity:Foliar contact or vapours may cause visual symptoms of chlorosis to nearby sensitive plants. ADI:(JMPR) 0.02 mg/kg b.w. [1986].
Environmental Profile
Ecotoxicology: 
Algae:EC50 (48 h) 2.10 mg/l.Birds:Acute oral LD50 for bobwhite quail and mallard ducks >2510 mg/kg. LC50 (8 d) for bobwhite quail and mallard ducks >5620 ppm.Daphnia:LC50 (48 h) 5.2 mg/l.Fish:LC50 (96 h) for bluegill sunfish 34, Atlantic silverside 6.26, rainbow trout 19 mg/l.Worms:LC50 (14 d) for Eisenia foetida 156 mg/kg.Other aquatic spp.:LC50 for pink shrimp 8.9, eastern oyster 5.3 mg/l. 
Environmental fate: 
Soil: DT50 in soil c. 30-135 d. Koc 150-562, suggesting clomazone would be mobile in soil; however, in field trials it was found not to leach beyond the top 10 cm of soil (J. Rosenwald et al). WATER SOLUBILITY: 1100 ppm
Transport Information
Signal Word:WARNING; Hazard Class:II (Moderately hazardous)

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