Frequent Questions

Is Hexabromocyclododecane (HBCD) subject to TRI reporting?

Hexabromocyclododecane (HBCD) is a brominated flame retardant used mainly in expanded polystyrene foam and extruded polystyrene foam for thermal insulation boards in the building and construction industry. Is this chemical subject to EPCRA §313 TRI release reporting?

Yes. On November 28, 2016, EPA issued a final rule that added an HBCD category to the TRI list of reportable chemicals (81 FR 85440). The category covers HBCD as identified through two primary Chemical Abstract Service (CAS) numbers, 3194-55-6 (1,2,5,6,9,10-hexabromocyclododecane) and 25637-99-4 (hexabromocyclododecane). HBCD meets the TRI chemical listing criteria because it presents potential human health concerns for developmental and reproductive effects, is highly toxic to aquatic and land-dwelling organisms, bioaccumulates, and is persistent in the environment. Based on the bioaccumulation and persistence data for HBCD, it meets the criteria for a persistent, bioaccumulative, and toxic (PBT) chemical, and a 100-pound threshold has been established for TRI reporting.

This rulemaking is a part of EPA’s ongoing efforts to examine the scope of TRI and provide communities with more complete information on chemicals. Additional information regarding the proposed rule is available at the following URL: 

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