Hazardous Characteristics Assessment

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Question:What are Basel Annex III hazardous characteristics and how are H-codes used in practice?

Quick Answer:Annex III of the Basel Convention lists hazardous characteristics (H-codes) such as toxicity, corrosivity, flammability, and ecotoxicity, which are used to determine whether a waste must be treated as hazardous. In practice, H-codes translate your analytical and technical data into a standardized hazard profile that authorities can compare across shipments, and they support decisions such as when a load must be classified as A1181 instead of Y49.

Overview

Assigning proper H-codes (hazardous characteristics H1-H13 fromBasel Annex III) is required for all A1181 e-waste and demonstrates due diligence even for Y49 waste classification.

List of Basel Annex III Hazardous Characteristics

H1: EXPLOSIVE

• Definition: Capable of producing gas, heat, or pressure through chemical reaction
• E-waste context: Lithium batteries with thermal runaway risk, pressurized components
• When to assign: Equipment contains lithium-ion or lithium-polymer batteries exceeding 100Wh capacity

H3: FLAMMABLE LIQUIDS

• Definition: Liquids with flash point below 60.5°C
• E-waste context: Electrolytes in batteries and capacitors, cleaning solvent residues
• When to assign: Equipment contains wet electrolytic capacitors or unsealed batteries

H4.1: FLAMMABLE SOLIDS

• Definition: Solids readily combustible or may cause or contribute to fire
• E-waste context: Magnesium components, certain plastics with low ignition temperature
• When to assign: Rarely applicable to e-waste; magnesium laptop cases are primary example

H6.1: ACUTE TOXICITY

• Definition: Fatal or harmful if swallowed, inhaled, or through skin contact
• E-waste context: Lead, mercury, cadmium, arsenic, beryllium
• When to assign: ANY presence of lead in solder or CRT glass, mercury in switches or backlights, cadmium in batteries or pigments

H6.2: INFECTIOUS SUBSTANCES

• Definition: Contains viable microorganisms causing disease
• E-waste context: NOT applicable to standard e-waste; only medical equipment contaminated with biological materials
• When to assign: Do not assign for standard consumer or commercial electronics

H8: CORROSIVE

• Definition: Causes severe damage to living tissue or corrodes steel or aluminum
• E-waste context: Battery electrolytes such as sulfuric acid and potassium hydroxide
• When to assign: Equipment contains unsealed lead-acid or alkaline batteries

H10: LIBERATION OF TOXIC GASES

• Definition: Releases toxic gases upon contact with air or water
• E-waste context: Certain battery chemistries, phosphorus compounds
• When to assign: Equipment contains sodium-sulfur batteries or reactive phosphorus compounds (rare in consumer electronics)

H11: TOXIC (DELAYED OR CHRONIC)

• Definition: Causes long-term health effects through prolonged or repeated exposure
• E-waste context: Brominated flame retardants (BFRs), PCBs, certain heavy metals
• When to assign: Plastics contain BFRs above 1000 ppm, equipment manufactured before 1980 with PCB risk

H12: ECOTOXIC

• Definition: Presents immediate or delayed danger to environment
• E-waste context: Heavy metals including lead, mercury, and cadmium; persistent organic pollutants
• When to assign: Presence of any heavy metals or POPs that bioaccumulate in environment

H13: CAPABLE OF YIELDING HAZARDOUS SUBSTANCES

• Definition: Can release hazardous materials after disposal through leaching or decomposition
• E-waste context: All circuit boards and components containing heavy metals or POPs
• When to assign: Equipment contains materials that can leach under landfill conditions

How to Assign H-Codes

CIRCUIT BOARDS WITH LEAD SOLDER:

• H6.1 (Acute toxicity from lead)
• H11 (Chronic toxicity from lead and BFRs)
• H12 (Ecotoxic due to lead accumulation)
• H13 (Can yield hazardous substances through lead leaching)

CRT MONITORS AND TELEVISIONS:

• H6.1 (Acute toxicity from lead in glass, up to 4 kg per unit)
• H11 (Chronic toxicity from lead exposure)
• H12 (Ecotoxic from lead, barium, strontium)
• H13 (Can yield hazardous substances as glass breakdown releases lead)

LCD PANELS WITH MERCURY BACKLIGHTS:

• H6.1 (Acute toxicity from mercury vapor if broken)
• H11 (Chronic toxicity from mercury bioaccumulation)
• H12 (Ecotoxic due to mercury environmental persistence)
• H13 (Can yield hazardous substances through mercury release)

EQUIPMENT WITH LITHIUM BATTERIES:

• H1 (Explosive from thermal runaway risk)
• H3 (Flammable liquids from electrolyte)
• H6.1 (Acute toxicity from lithium and cobalt)
• H12 (Ecotoxic from heavy metal content)

PLASTIC COMPONENTS WITH BFRs:

• H11 (Chronic toxicity from brominated flame retardants)
• H12 (Ecotoxic as persistent organic pollutants)
• H13 (Can yield hazardous substances as degradation releases brominated compounds)

Presumptive H-Code Assignment

When testing is not feasible, competent authorities often accept presumptive H-code assignment based on known component composition:

PRESUME H6.1, H11, H12, H13 FOR:

• Any circuit boards (assume lead solder unless proven otherwise)
• CRT glass (lead content well-documented in technical literature)
• Pre-2010 LCD panels (mercury backlights standard until LED transition)

PRESUME H1, H3 FOR:

• Equipment with lithium batteries exceeding 100Wh capacity
• Power tools with high-capacity battery packs

PRESUME H11, H12 FOR:

• Plastic housings from pre-2008 equipment with high BFR likelihood
• Equipment from industries with flame retardant requirements such as aviation and industrial control

Multiple H-Codes

ASSIGN ALL APPLICABLE H-CODES:E-waste typically exhibits multiple hazardous characteristics. Do not select only one H-code; list all that apply to the waste stream.

EXAMPLE - Laptop computers (typical assignment):

• H1: Lithium battery
• H3: Battery electrolyte
• H6.1: Lead solder on motherboard
• H11: BFRs in plastic case, lead chronic exposure
• H12: Heavy metals ecotoxicity
• H13: Lead and BFR leaching potential

Competent Authority Review

Competent authorities scrutinize H-code assignments during notification review. Insufficient H-codes (underestimating hazards) causes more rejections than excessive H-codes (overestimating hazards).

BEST PRACTICE:When uncertain whether an H-code applies, include it with explanatory note. Example: "H11 assigned presumptively due to potential BFR content in plastics; testing available upon request."

For guidance on documenting H-codes in your notification, seeBlock 14: Waste Identification and ClassificationandBlock 16: Composition and Properties.

Testing and Evidence Required

WHEN TESTING IS REQUIRED:

• Equipment manufacturing date unknown or pre-2006
• Competent authority specifically requests test data
• Mixed equipment types with uncertain composition
• First-time exporter establishing baseline characterization

ACCEPTABLE TEST METHODS:

• XRF (X-ray fluorescence) for heavy metals screening
• ICP-MS (Inductively Coupled Plasma Mass Spectrometry) for precise quantification
• TCLP (Toxicity Characteristic Leaching Procedure) for H13 assessment
• GC-MS (Gas Chromatography-Mass Spectrometry) for BFRs and POPs

DOCUMENTATION TO INCLUDE IN NOTIFICATION:

• Laboratory test reports from certified facility
• Manufacturer specifications showing RoHS compliance if applicable
• Photographic evidence of equipment types
• Bill of materials for disassembled components
• Previous notification approvals for same waste stream if available

Linking H-Codes to Y49 vs A1181

H-codes translate your analytical and technical data into a standardized hazard profile that authorities can compare across shipments, and they support decisions such as when a load must be classified as A1181 instead of Y49.

Common Mistakes

• Assigning only H6.1 for circuit boards when should also include H11, H12, H13
• Not assigning H1 for lithium batteries exceeding 100Wh
• Overlooking H11 and H12 for BFRs in plastics
• Failing to assign H13 because nearly all e-waste can yield hazardous substances
• Using H6.2 (infectious) for non-medical equipment

FAQs

FAQ – Do I need lab tests for every H-code?

When testing is not feasible, competent authorities often accept presumptive H-code assignment based on known component composition. Testing is required when equipment manufacturing date is unknown or pre-2006, the competent authority specifically requests test data, mixed equipment types with uncertain composition, or when a first-time exporter is establishing baseline characterization.

FAQ – What happens if different H-codes apply to one shipment?

E-waste typically exhibits multiple hazardous characteristics. Assign all applicable H-codes; do not select only one H-code; list all that apply to the waste stream.

References

• Basel Annex III - Hazardous Characteristics
• Basel Technical Guidelines on E-Waste
• Basel Convention Text

COP-17 update: Annex IV and e-waste guidelines

COP-17 was held from 28 April to 9 May 2025 and adopted 28 Basel Convention decisions. Operators should treat those decisions as the current reference point when preparing Basel Convention files for transboundary movements.

BC-17/15 adopted a replacement Annex IV. The update is scheduled to become effective on 1 January 2030, following depositary communication on 1 July 2029. Until national implementation is confirmed, use current domestic rules but plan workflows, contracts, and recovery/disposal references for the 2030 Annex IV replacement.

BC-17/4 adopted new technical guidelines on transboundary movements of e-waste and used electrical and electronic equipment (EEE). For e-waste and used EEE movements, reference these COP-17 guidelines when preparing classification, PIC, ESM, and supporting documentation.

Practical operator note: for 2025–2029 files, record which Basel decision basis is being used, confirm competent-authority expectations, and revisit Annex IV and e-waste assumptions before shipment approval or renewal.