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Chemical Identification
Common Name
Nuarimol
中文通用名
氟苯嘧啶醇
IUPAC
(RS)-2-chloro-4′-fluoro-α-(pyrimidin-5-yl)benzhydryl alcohol
CAS
α-(2-chlorophenyl)-α-(4-fluorophenyl)-5-pyrimidinemethanol
CAS No.
63284-71-9
Molecular Formula
C17H12ClFN2O
Molecular Structure
Physical Properties
Molecular weight:314.7g/mol; Physical form:Colourless crystals. Density:0.6-0.8 (bulk); Melting point:126-127℃; Vapour pressure:<0.0027 mPa (25℃); Henry constant:<3.27 × 10-5 Pa m3 mol-1 (calc.); Partition coefficient(n-octanol and water):logP = 3.18 (pH 7); Solubility:In water 26 mg/l (pH 7, 25℃). In acetone 170, methanol 55, xylene 20 (all in g/l, 25℃). Readily soluble in acetonitrile, benzene, and chloroform. Slightly soluble in hexane.Stability:Decomposed rapidly by u.v. light. Stable at 52℃.
Toxicology
Oral:Acute oral LD50 for male rats 1250, female rats 2500, male mice 2500, female mice 3000, beagle dogs 500 mg/ kg. Percutaneous:Acute percutaneous LD50 for rabbits >2000 mg/kg. No skin irritation; slight eye irritant (rabbits). Not a skin sensitiser (guinea pigs). Inhalation:Rats essentially unaffected after 1 h by 0.37 mg tech./l air.
Environmental Profile
Ecotoxicology:
Algae: EC50 (96 h) for Selenastrum capricornutum 2.5 mg/l.Bees:Not toxic to bees; LC50 (contact) >1 g/l.Birds:Acute oral LD50 for bobwhite quail 200 mg/ kg.Daphnia: LC50 (48 h) >25 mg/l.Fish: LC50 (96 h) for bluegill sunfish c. 12.1 mg/l.Worms: NOEC (14 d) for earthworms 100 g/ kg soil.

Environmental fate:
Animals:In rats, following oral administration, elimination is rapid.Soil:Microbial degradation is accelerated by light; DT50 (lab.) 344 d, (field) c. 150 d. Koc 2-6, depending on soil type; Kd not determinable due to strong absorption.Plant:Numerous photodegradation products are formed.
Transport Information
Signal Word:CAUTION; Hazard Class:III(Slightly hazardous)

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