BFR (BFR)

Brominated Flame Retardants (BFRs) are a family of bromine-containing chemical additives historically incorporated into plastic casings of electronics, printed circuit board substrates, cables, and upholstery foams to slow ignition and burn rate. The major BFR classes — polybrominated diphenyl ethers (PBDEs), tetrabromobisphenol-A (TBBPA), hexabromocyclododecane (HBCD), polybrominated biphenyls (PBBs) — account for most legacy BFR mass in Indian e-waste streams. PBDEs and PBBs are listed under the Stockholm Convention on Persistent Organic Pollutants, with PBDE production banned in most countries since the late 2000s.

The recycling problem with BFRs is severe. Mechanical recycling of plastics containing BFRs simply concentrates the chemicals into recycled plastic resin, where they enter new products including consumer goods. Thermal processing — incineration or pyrolysis — releases brominated dioxins and furans (PBDD/F), among the most toxic compounds known, requiring activated carbon scrubbers and 1,100°C+ combustion to break down completely. As a result, BFR-containing plastics from e-waste sorting are typically segregated and either exported to certified high-temperature incinerators or sent to authorised hazardous waste landfills — both at significant cost rather than revenue.

For Indian e-waste recyclers, BFR identification is a non-trivial operational challenge. Visual identification is unreliable (most BFR-containing plastics look identical to non-BFR plastics). Bromine content can be detected by handheld XRF (X-ray fluorescence) analysers at ₹3–8 lakh capex, with detection threshold of 500 mg/kg total bromine. Plastics above this threshold are diverted from the recycling stream into hazardous disposal. Typical BFR fraction in e-waste plastic is 15–30% of total plastic mass — meaning recyclers can monetise only 70–85% of dismantled plastic as recycled resin. The Indian E-Waste Management Rules 2022 explicitly prohibit mixing BFR-containing plastics into the general recycled plastic stream, with CPCB audits checking for chain-of-custody documentation. Producers and recyclers progressively shifting to halogen-free flame retardants (alumina trihydrate, phosphorus-based, nitrogen-based) ease the long-term problem.

• Bromine-containing flame retardants in plastic casings, PCBs, cables, upholstery.
• Major classes: PBDEs, TBBPA, HBCD, PBBs; several under Stockholm Convention listing.
• Thermal processing releases brominated dioxins — requires 1,100°C+ incineration and scrubbers.
• XRF detection above 500 mg/kg bromine diverts plastic from recycling to hazardous disposal.