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Viton (FPM) and Iodine Pentafluoride: Chemical Resistance

Fluoroelastomer (FKM/FPM)

Rating

Concentration20 °C50 °CRemark
concentration not statedDD

Material comparison at 20 °C

Iodine Pentafluoride: Material comparison at 20 °CViton (FPM): D (highlighted); PTFE: B; Aluminium: C; PP: C; PVDF: C; EPDM: D.PTFE: BAluminium: CPP: CPVDF: CEPDM: DViton (FPM): DFPMNBR: DNylon (PA): DPolycarbonate: DPETG: DAcetal (POM): DECTFE/ETFE: –FEP: –HDPE: –LDPE: –PMP: –Polystyrene: –Polysulfone: –PVC Rigid: –PVC Flexible: –SAN: –Silicone: –SS 304: –SS 316: –
A very good resistanceB good resistanceC limited resistanceD not resistantno data
Each bar is one material. Taller bars indicate better resistance. The highlighted bar is the current material.

Resistance overview

Viton (FPM) is not resistant (D) to Iodine Pentafluoride and should not be used in direct contact. The chemical is expected to cause rapid degradation, which can include dissolution, cracking, severe swelling, or complete structural failure of the material.

Application context

Iodine Pentafluoride is commonly encountered in bleaching and water disinfection. Viton (FPM) (Fluoroelastomer (FKM/FPM)) is an elastomer typically used for seals, O-rings, hoses and flexible connections. Because Iodine Pentafluoride is classified as corrosive, the choice of containment material is especially critical to prevent leaks, equipment damage, and safety hazards.

Practical recommendation

Viton (FPM) is not recommended for use with Iodine Pentafluoride. The D rating indicates that the material will suffer rapid and severe degradation, which may include cracking, dissolution, severe swelling, or complete structural failure. Using this combination risks equipment damage, leaks, and potential safety incidents.

Did you know?

Fluoroelastomer (FKM/FPM) is commonly chosen for seals, O-rings, hoses and flexible connections because of its combination of chemical resistance, mechanical strength, and cost-effectiveness.

Materials rated A or B at 20 °C

Fluoropolymers
PTFE B

About Viton (FPM)

Fluoroelastomer (Viton, FKM/FPM) resists fuels, oils and many acids. Ketones, esters, amines and hot water or steam attack it.

Rating scale

A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.

All materials for Iodine PentafluorideAll chemicals for Viton (FPM)

About this data

The ratings come from the chemical resistance list published by Bürkle GmbH, which compiled them from raw-material manufacturers’ data. They describe laboratory tests on the raw material at 20 °C and 50 °C.

A finished part also sees pressure, mechanical stress, welds and mixtures that a laboratory test does not. Treat the rating as a first filter and test under your own conditions before relying on it.