Which materials are likely to produce toxic hydrogen cyanide when burned?

• A. Wood and paper products
• B. Upholstered furniture and carpets
• C. Plastics and metals
• D. Glass and ceramics

Answer: (B)

Upholstered furniture and carpets are the correct choice because they often contain materials like polyurethane foam, synthetic fibers, and adhesives, which release toxic hydrogen cyanide (HCN) when subjected to combustion. HCN is a highly toxic gas that can be produced during the burning of organic materials and is particularly associated with certain synthetic materials found in furniture and carpeting.

In contrast, while wood and paper products can generate various harmful smoke and gases when burned, they do not typically produce significant amounts of hydrogen cyanide. Plastics, especially those that include elements like nitrogen, can also release HCN upon combustion, but the specific concern often centers around the materials present in upholstered items, which are prevalent contributors to HCN in fire scenarios. Glass and ceramics, on the other hand, are inorganic materials that do not release toxic gases like hydrogen cyanide when burned, emphasizing the unique risk posed by upholstery and carpeting in fire situations.