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4-chlorobenzene-1,2-diol (Molecular Formula: C6H5ClO2)
Product Name: 4-chlorobenzene-1,2-diol
CAS Registry Number: 2138-22-9
EINECS: 218-381-9  
Synonyms: Pyrocatechol; 4-chloro-; 4-Chloro-1,2-benzenediol; 2138-22-9;4-chlorobenzene-1,2-diol; 1,2-Benzenediol; 4-Chloropyrocatechol;
Molecular Structure:
Molecular Formula: C6H5ClO2
Molecular Weight: 144.5557
Density:  1.471 g/cm3
Boiling Point:  140ºC 10,5mm
Melting Point:  90-94 ºC
Flash Point:  115.3
Refractive index:  1.629
Risk Codes:  S26;S36/37/39;S45
Safety Statements:  R34
Hazard Symbols:  C: Corrosive;
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