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Ultradur PRO B4521

BASF · PBT · Polyesters (PBT, copolyester)

Ultradur PRO B4521 is a PBT grade from BASF. The cited source lists it as compatible with gamma and EtO sterilization; notes limited steam/autoclave compatibility. Source

Data comes from public supplier literature (cited on each grade page). A blank cell means not stated in the source, not "no". Always confirm with the supplier's current documentation before use.
Reference only: Compiled from public manufacturer literature for reference only; it may be incomplete or outdated. Before using any grade in a device, verify the current manufacturer data sheet and complete your own testing and regulatory review.
USP VInot stated
ISO 10993not stated
Gamma✔
EtO✔
Autoclavelimited
VHPnot stated
FDA master filenot stated
Autoclave / steam (as stated)121 °C: limited resistance; 134/143 °C: no resistance (depends on conditions, duration and number of cycles)
Data note: BASF sterilization table: Ultradur PRO steam 121 °C limited, gamma/e-beam and EtO full resistance, plasma limited.
Related: All Polyesters (PBT, copolyester) grades · PBT family · Gamma-compatible grades · EtO-compatible grades · Gamma sterilization guide · Autoclave guide

Source: https://download.basf.com/p1/8a8081c57fd4b609018021fe1bcc1c95/en/Ultraform%C2%AE_PRO_%28POM%29_and_Ultradur%C2%AE_PRO_%28PBT%29_-_Engineering_Plastics_for_Medical_Solutions_Brochure_English.pdf?view=

Last checked: 2026-10-16 · How we source data · Suggest a correction