0.15–0.35 phr (based on polyol) for standard density (20–25 kg/m³) foam; adjust for water level.

Yes, lower to 0.10–0.18 phr and compensate with a slightly higher amine catalyst; also add an antioxidant.

Yes, at 0.02–0.05% on total resin; it promotes faster tack-free time.

Replace T-9 with a milder tin catalyst like T-120, or reduce T-9 to below 0.05 phr.

Approximately 28% tin (as Sn²⁺); it is a viscous liquid.

Yes, highly sensitive; always store under dry nitrogen and use dry polyols (<0.05% water).

Only if the current tin level is very low (<0.1 phr); increase to 0.25 phr may improve tear by 10–15%.

Stannous tin can oxidize to stannic, causing yellowing; use a chelator (e.g., citric acid) to stabilize.

Yes, but it is very fast; use together with a delay amine or reduce to 0.03–0.05 phr.

In a cool, dark place under nitrogen; avoid exposure to air and light; shelf life 6–12 months.