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PP and Hydroquinone: Chemical Resistance

Polypropylene

Rating

Concentration20 °C50 °CRemark
saturatedA–

Materials rated A or B at 20 °C

Based on the row for saturated, 20 °C.

Thermoplastics
PVC Rigid A, LDPE A, PETG A, SAN A
Fluoropolymers
PTFE A, FEP A
Metals
SS 316 A, SS 304 A, Aluminium A

About PP

Polypropylene resists most acids, alkalis and salt solutions. Concentrated oxidising acids, chlorinated solvents and aromatic hydrocarbons attack it, and it turns brittle below about 0 °C.

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.

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.