Chlorflurenol

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Chemical Identification | General Product Information | Physical & Safety Data

Chemical Identification

Common Name

Chlorflurenol

中文通用名

整形醇

IUPAC

(RS)-2-chloro-9-hydroxyfluorene-9-carboxylic acid

CAS

2-chloro-9-hydroxy-9H-fluorene-9-carboxylic acid

CAS No.

2464-37-1

Molecular Formula

C₁₄H₉ClO₃

Molecular Structure

General Product Information

Category

Plant growth regulators > Growth inhibitors
Herbicides > Unclassified herbicides

Activity

Plant growth regulator, herbicide

Physical & Safety Data

Physical Properties

Molecular weight:274.7; (acid, 260.7); Physical form:White crystals; (tech., pale yellow or brown). Density:1.496 (20 °C); Composition:Tech. is 97%; contains methyl 2-chloro-9-hydroxyfluorene -9-carboxylate (65-70%), methyl 2,7-dichloro-9-hydroxyfluorene-9-carboxylate (10-15%) and methyl 9-hydroxyfluorene-9-carboxylate (15-20%). Melting point:155 °C; Vapour pressure:0.13 mPa (25 °C, gas saturation method); Henry constant:7.9×10-4 Pa m3 mol-1; Partition coefficient(n-octanol and water):logP = 1.6; Solubility:In water 21 mg/l (20 °C), 26 mg/l (pH 5, 20 °C). In acetone 260, methanol 150, ethanol 80, benzene 70, isopropanol 24, carbon tetrachloride 24, cyclohexane 2.4 (all in g/kg, 20 °C).; Stability:Aqueous hydrolysis DT50 <1 d (pH 9, 22 °C). Aqueous photolysis DT50 4-20 h. Unstable above m.p.

Toxicology

Oral:Acute oral LD₅₀ for rats 12 800, dogs >6400 mg/kg. Percutaneous:Acute percutaneous LD₅₀ for rats and rabbits >10 000 mg/kg. Not irritating to skin and eyes. Inhalation:LC₅₀ for rats >101.5 mg/l.

Environmental Profile

Ecotoxicology:
Birds:Acute oral LD₅₀ for quail >10 000 mg/kg. Daphnia:EC₅₀ (48 h) 5.1 mg/l.Fish:LC₅₀ (96 h) for rainbow trout 3.2, bluegill sunfish 7.2, carp c. 9 mg/l.
Environmental fate:
Animals:In rats, following oral administration of chlorflurenol-methyl, almost complete elimination occurs within 24 hours.Soil:Degrades rapidly in light, air, water and soil; DT₅₀ of chlorflurenol-methyl in soil c. 1.5 d, in water c. 2 d. The main metabolite is the corresponding carboxylic acid; minor metabolites are 2-chloro-8-hydroxyPlant:DT₅₀ of chlorflurenol-methyl on turf c. 2 d.

Transport Information

Hazard Class:III (Slightly hazardous)