The phosphonate's high effectiveness and high polymer compatibility allows it to be used at low dosage in the foam matrix, which adds to its overall sustainability. By applying Green Urethanes' unique processing characteristics, the amount of flame retardant required for flexible foam to pass the smolder and open flame tests in California TB 117 is reduced by 80 %. Further benefits for PU applications include very good ageing stability, low smoke density and smoke gas corrosivity, and good recyclability. Green Urethane's Technology is already available in the US market and uses natural oil polyols (NOP) to produce a range of standard foams for the North American bedding and furniture industries. These foams have a total bio-renewable content of approximately 35 % by weight. Jeff Rowlands, Director of Green Urethanes Limited comments: "By using these advances in Green Chemistry, the original safety objectives of Cal TB 117 are still being met; but now with the added assurance that it comes with long-term environmental protection from undesirable emissions. These are positive developments for the upholstery sector and also provide a route to reducing the environmental impact of all foam types, including those made for uses which do not need to meet the Cal TB 117 test criteria.