Chlorinated Paraffin Wax (CPW)

1. Basic Identification Attributes

• Chemical Name (IUPAC): Chlorinated paraffin (complex mixture of polychlorinated n-alkanes)

• Common/Trade Name: Chlorinated Paraffin Wax (CPW)

• CAS Number: 63449-39-8 (varies by chlorination degree)

• HS Code: 2712.90.20

• Molecular Formula: Variable — CnH2n+2-xClx (where n = 10–30+, x = chlorine atoms)

• Synonyms:
  • CPW

  • Chlorinated paraffin

  • Polychlorinated n-alkanes

2. Physical & Chemical Properties

• Physical State: Solid wax (flakes, powder, or pastilles)

• Color & Odor: Light yellow to dark brown; mild characteristic odor

• Melting Point: Typically 50–105°C depending on chlorination and chain length

• Boiling Point: Decomposes before boiling

• Density: Approx. 1.3–1.6 g/cm³ depending on chlorination

• Solubility: Insoluble in water; soluble in organic solvents such as chlorinated solvents, aromatic hydrocarbons, and oils

• Chlorine Content: Typically 40–70% by weight, depending on product grade

• Stability: Chemically stable under normal conditions; decomposes at elevated temperatures releasing HCl

3. Safety & Hazard Attributes

• Hazard Class (GHS): Classified as hazardous depending on chlorination degree and formulation; may be harmful if inhaled or ingested

• NFPA Ratings:
  • Health: 2

  • Flammability: 1

  • Reactivity: 1

• Exposure Limits: Use with appropriate ventilation; avoid inhalation of dust or fumes

• Toxicity: Possible skin and respiratory irritant; suspected to be persistent organic pollutant (varies by grade)

• Reactivity: Stable but may release toxic gases (HCl) on thermal decomposition

4. Storage & Handling Attributes

• Storage Conditions: Store in a cool, dry, well-ventilated area away from heat and ignition sources

• Container Type: Sealed metal drums or fiberboard containers lined with inert materials

• Shelf Life: Up to 3 years if stored properly

• Special Handling: Use PPE including gloves, goggles, and dust masks; avoid dust generation

5. Regulatory & Compliance Attributes

• REACH Status: Subject to restrictions due to environmental and health concerns (varies by chlorine content)

• Transportation: Classified as non-dangerous goods but subject to local regulations

• Waste Disposal: Dispose as hazardous waste in compliance with local regulations; avoid environmental release

• Environmental Restrictions: Some chlorinated paraffins are restricted or banned in certain regions (e.g., EU) due to persistence and bioaccumulation

6. Environmental & Health Impact

• Ecotoxicity: Persistent and bioaccumulative; toxic to aquatic organisms

• Persistence: Very persistent in the environment

• Bioaccumulation: High potential for bioaccumulation in aquatic organisms

• Carcinogenicity/Mutagenicity: Some grades are suspected carcinogens; regulatory agencies recommend caution

Biodegradability: Poorly biodegradable