The low-smoke, low-toxicity flame retardants market is projected to grow from USD 957.3 million in 2026 to USD 2,245.6 million by 2036, at a CAGR of 8.9%. Phosphorus-Based Smoke-Suppression FRs will dominate with a 30.0% market share, while rail & metro interior materials (en 45545) will lead the application segment with a 28.0% share.