Meltable flame retardant compositions and fibers fabricated thereof are provided. Compositions of the present disclosure comprise a polymer, a nitrogenous compounds and/or a phosphorus compound. Fibers and compositions of the present disclosure can be used to make fabrics. When fibers, fabrics, and compositions of the present disclosure are exposed to flame, non-flammable gases are released such that the flames is retarded and/or extinguished.
