1. Basic Identification Information

Parameter	English Specification/Value
IUPAC Name	4-Chloro-3,5-dimethylphenol
Common Name(s)	Chloroxylenol; PCMX; p-Chloro-m-xylenol; 4-Chloro-3,5-xylenol
CAS Registry Number	88-04-0
EC/EINECS Number	201-793-8
Molecular Formula	C₈H₉ClO
Molecular Weight	156.61 g/mol
Chemical Class	Halogenated phenol derivative; broad-spectrum antimicrobial agent; antiseptic; preservative

2. Physicochemical Properties

Property Category	Specific Parameter	Specification/Value
Structural Features	Functional Groups	Phenolic hydroxyl (-OH); chlorine substituent (-Cl); two methyl groups (-CH₃) on aromatic ring
Physical Appearance	State & Color	White to off-white crystalline powder; faint phenolic/camphor-like odor
	Melting Point	114–116 °C (lit.)
	Boiling Point	246 °C (lit.; slight decomposition above boiling point)
	Density (25 °C)	1.20 g/cm³ (crystalline form)
Solubility	Polar Solvents	Soluble in ethanol (1 g/3 mL), propylene glycol (1 g/5 mL), acetone; slightly soluble in water (0.03 g/100 mL at 25 °C, solubility increases in alkaline systems via sodium salt formation)
	Non-polar Solvents	Moderately soluble in cosmetic esters (e.g., isopropyl myristate) and mineral oil; freely soluble in toluene and hexane