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Chemical Identification
Common Name
Dichlorophen
中文通用名
双氯酚
IUPAC
4,4′-dichloro-2,2′-methylenediphenol
CAS
2,2′-methylenebis[4-chlorophenol]
CAS No.
97-23-4
Molecular Formula
C13H10Cl2O2
Molecular Structure
Physical Properties
Molecular weight:269.1; Physical form:Colourless, odourless crystals; ( tech., light tan powder, with a slight phenolic odour). Melting point:177-178 °C; ( tech., 164 °C); Vapour pressure:1.3×10-5 mPa (25 °C); Henry constant:1.17×10-7 Pa m3 mol-1 ( calc.); pKa: pKa1 7.6; pKa2 11.6, weak acid; Solubility:In water 30 mg/l (25 °C). In ethanol 530, isopropanol 540, acetone 800, propylene glycol 450 (all in g/l, 25 °C). Soluble in methanol, isopropyl ether, and petroleum ether. Sparingly soluble in toluene.; Stability:Slowly oxidised in air. Acidic in reaction, and forms salts with aqueous alkalis. Photolysis in acidic solution in the absence of oxygen results in hydrolysis of one chlorine atom, to give the corresponding phenol.
Toxicology
Oral:Acute oral LD50 for rats 2690 mg/kg, mice 1000 mg/kg, guinea pigs 1250 mg/kg, dogs 2000 mg/kg.
Environmental Profile
Ecotoxicology: 
Fish:Toxic to fish.
WATER SOLUBILITY: 30 mg/l at 25° C
Transport Information
Signal Word:CAUTION; Hazard Class:III (Slightly hazardous)

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