DexMetal

CRT and Display Panel Guidelines

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Cathode ray tubes and display panels require special classification consideration due to high concentrations of hazardous materials including lead glass and mercury backlights.

CRT (Cathode Ray Tube) Classification

ALWAYS CLASSIFY AS A1181 - NO EXCEPTIONS

LEAD CONTENT:

  • Panel glass (screen): 1-3% lead by weight
  • Funnel glass (back cone): 18-25% lead by weight
  • Neck glass: Up to 30% lead by weight
  • Total lead per unit: 1.5 to 4 kg depending on screen size

OTHER HAZARDOUS COMPONENTS:

  • Barium in panel glass
  • Strontium in funnel glass
  • Phosphor coatings on screen (may contain heavy metals)
  • Electron gun assembly with lead solder

H-CODES FOR CRTs:

  • H6.1: Acute toxicity from high lead concentration
  • H11: Chronic toxicity from prolonged lead exposure
  • H12: Ecotoxic due to lead, barium, strontium
  • H13: Yields hazardous substances as glass breakdown releases lead

CRT Types and Lead Content

MONOCHROME CRTs (Lower lead content):

  • Older computer monitors and oscilloscopes
  • Lead content: 1-2 kg per unit
  • Simpler construction, less leaded glass

COLOR CRTs (Higher lead content):

  • Television sets and color computer monitors
  • Lead content: 2-4 kg per unit for large screens
  • Shadow mask contains additional metals

LARGE FORMAT CRTs (Highest lead content):

  • Projection TVs with 3 CRT tubes
  • Commercial displays and video walls
  • Lead content: 6-12 kg per unit

CRT Glass Management

INTACT CRTs:

  • Implosion risk due to vacuum
  • Must maintain vacuum seal during transport
  • UN approved packaging required for A1181 classification
  • Special handling to prevent breakage

PROCESSED CRT GLASS:

  • Panel glass separated from funnel glass
  • Still classified as A1181 due to lead content
  • Different recycling pathways for panel versus funnel glass
  • Some facilities accept only separated glass

CRT GLASS EXPORT RESTRICTIONS:

  • Many countries prohibit CRT glass import even for recycling
  • Check import country policy before notification
  • Lead smelters increasingly reluctant to accept CRT glass
  • Alternative: Domestic glass-to-glass recycling where available

LCD Panel Classification

DEPENDS ON BACKLIGHT TYPE AND MANUFACTURING DATE

LCD WITH MERCURY BACKLIGHTS (A1181):

  • Manufactured before 2009-2010 (CCFL backlights)
  • Mercury content: 2-5 mg per lamp
  • Multiple lamps per panel (4-24 lamps typical)
  • Total mercury: 10-100 mg per panel

H-CODES FOR MERCURY LCD:

  • H6.1: Acute toxicity from mercury vapor if broken
  • H11: Chronic toxicity from mercury bioaccumulation
  • H12: Ecotoxic due to mercury persistence
  • H13: Mercury release during disposal

LCD WITH LED BACKLIGHTS (Potentially Y49):

  • Manufactured after 2010 for most consumer products
  • No mercury in LED backlights
  • May still contain small amounts of heavy metals in driver circuits
  • Classification depends on driver board composition

TO CLASSIFY LED-BACKLIT LCD AS Y49:

  • Verify LED backlight (no mercury)
  • Driver circuits use lead-free solder (post-2006 preferred)
  • No cadmium in quantum dots (newer technology)
  • BFR content in plastic frame below 1000 ppm

Plasma Display Classification

TYPICALLY A1181 DUE TO MULTIPLE FACTORS

HAZARDOUS COMPONENTS:

  • Lead in glass substrate (0.5-1% by weight)
  • Mercury in plasma cells (small amounts per cell, significant total)
  • Driver circuits with lead solder
  • Large BFR-containing plastic housings

H-CODES FOR PLASMA DISPLAYS:

  • H6.1: Lead and mercury content
  • H11: Chronic toxicity from heavy metals and BFRs
  • H12: Ecotoxic from multiple hazardous constituents
  • H13: Leaching potential for lead and mercury

OLED and Newer Display Technologies

OLED DISPLAYS:

  • Generally lower hazardous material content
  • No mercury or lead in display elements
  • Classification depends on driver circuits and housing materials
  • May qualify as Y49 if RoHS-compliant throughout

QUANTUM DOT DISPLAYS:

  • Early versions contained cadmium (A1181)
  • Newer cadmium-free versions potentially Y49
  • Verify quantum dot composition before classification

Display Panel Disassembly Considerations

BACKLIGHT REMOVAL:

  • Mercury-containing CCFL lamps can be removed and segregated
  • Separate notification for mercury lamps versus LCD glass
  • Specialized facilities required for lamp processing
  • Economic viability depends on panel size and quantity

GLASS AND HOUSING SEPARATION:

  • LCD glass may contain indium (valuable recovery)
  • Plastic housing often contains BFRs (A1181 if above threshold)
  • Driver boards should be removed and classified as circuit boards
  • Metal frames can potentially classify as Y49 if clean

Manufacturing Date Determination

HOW TO IDENTIFY DISPLAY AGE:

  • Date code on label (month/year of manufacture)
  • Model number research (manufacturer specification sheets)
  • Technology type (CRT = pre-2010, LED = post-2010 typical)
  • Serial number decoding (varies by manufacturer)

WHEN DATE IS UNKNOWN:

  • CRTs: Always A1181 regardless of date
  • LCD panels: Presume mercury backlights (A1181) unless LED verified
  • Plasma: Always A1181
  • When uncertain, classify as A1181 to avoid rejection

Special Handling Requirements

FOR CRTs:

  • UN approved packaging to prevent implosion
  • Cushioning to protect glass during transport
  • Proper labeling for hazardous materials
  • Carrier must have dangerous goods certification

FOR MERCURY-CONTAINING LCDS:

  • Prevent breakage to avoid mercury release
  • Packaging to contain mercury if lamps break
  • Temperature control during storage (avoid extreme heat)

Common Classification Errors

  • Classifying CRTs as Y49 (never acceptable due to lead content)
  • Assuming all LCD panels are Y49 without verifying backlight type
  • Not accounting for mercury in pre-2010 LCD panels
  • Classifying plasma displays as non-hazardous
  • Not documenting manufacturing date or backlight technology

When completing your notification, seeBlock 16: Composition and Propertiesfor guidance on documenting display panel hazardous components.

References

Section: E-Waste · Type: guide