Description

Arochlor 1221 is a specific polychlorinated biphenyl (PCB) mixture, identified by the CAS registry number 11104-28-2. This product is valued for its historical role as a stable dielectric fluid and flame retardant in various industrial applications. It is primarily utilized in research, analytical reference standards, and specialized legacy system maintenance within sectors such as electrical equipment manufacturing and environmental analysis.

Application

• Primary use as a dielectric fluid and coolant in transformers and capacitors (historical/legacy systems).
• Employed as a plasticizer and flame retardant additive in certain polymers and sealants.
• Serves as a critical analytical reference standard for environmental testing and PCB congener analysis.
• Used in research and development for studying PCB behavior, degradation, and remediation techniques.
• Application in heat transfer fluids and hydraulic systems in specific industrial settings.
• Component in some specialized adhesives and coating formulations requiring chemical resistance.

Basic Information

Product Name	Arochlor 1221
CAS No.	11104-28-2
Molecular Formula	C12H10-nCln (n ≈ 1-2, average)
Molecular Weight	~188-223 g/mol (Average)
Synonyms	PCB 1221; Polychlorinated Biphenyl 1221; Aroclor 1221; Chlorinated Biphenyl; 1-Chlorobiphenyl mixture; Dichlorobiphenyl mixture; Kanechlor 300; Phenochlor DP3; Askarel (component)
EINECS	234-315-8

Quality Control

Our Arochlor 1221 is produced and handled under strict quality protocols to ensure batch-to-batch consistency and purity for research and analytical applications. Each lot is analyzed to confirm congener distribution and absence of major contaminants. A comprehensive Certificate of Analysis (COA) detailing congener-specific data, purity, and physical properties is provided with every shipment to support your compliance and research needs.

Storage

Preserve in a tightly closed container, protected from light. Store in a cool, dry, and well-ventilated area away from strong acids and organic solvents. Recommended storage temperature is 2-8°C to maximize stability. Keep container tightly sealed when not in use to prevent volatilization.

Specification

Item	Specification
Appearance	Clear, colorless to pale yellow viscous liquid
Identification (GC/MS)	Complies (PCB congener pattern matches Arochlor 1221)
Chlorine Content	20.0 - 22.0 % (w/w)
Primary Congeners	Monochlorobiphenyls and Dichlorobiphenyls
Purity (Total PCBs by GC)	≥ 98.0 %
Water Content (KF)	≤ 0.1 %
Density at 25°C	~1.15 g/mL

Note: Specifications can be tailored. Please contact us for the detailed technical data sheet of a specific grade.