At a glance
Based on the row for saturated, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316, SS 304, Aluminium, LDPE, FEP, PVC Flexible, Polystyrene, PMP, SAN (16)
- Rated B, good resistance
- Nylon (PA), Acetal (POM), Polycarbonate (3)
- Rated C, limited resistance
- NBR (1)
- Rated D, not resistant
- none (0)
- No data in the source
- ECTFE/ETFE, Silicone, Polysulfone, PETG
Based on the row for saturated, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
No material with a rating at both temperatures changes grade between 20 °C and 50 °C.
Substance
- CAS number
- 7789-00-6
- Formula
- K2CrO4
- Hazard symbols in the source
- T (toxic) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- aqueous; saturated
- Name in the source (German)
- Kaliumchromat
Rating by concentration
Show as a table
| Material | aqueous | saturated |
|---|---|---|
| Thermoplastics | ||
| HDPE | – | A |
| LDPE | – | A |
| PP | A | A |
| PVC Rigid | – | A |
| PVC Flexible | – | A |
| PMP | – | A |
| Polystyrene | – | A |
| SAN | – | A |
| Polycarbonate | B* | B* |
| PETG | – | – |
| Acetal (POM) | B* | B* |
| Nylon (PA) | B* | B |
| Polysulfone | – | – |
| Fluoropolymers | ||
| PTFE | A | A |
| FEP | A* | A* |
| PVDF | A | A |
| ECTFE/ETFE | – | – |
| Elastomers | ||
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | C | C |
| Silicone | – | – |
| Metals | ||
| SS 316 | A* | A* |
| SS 304 | A* | A* |
| Aluminium | A | A |
* estimated rating, given in the source without a temperature
Resistance table: Potassium Chromate, aqueous
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| PP | A | A | |
| Polycarbonate | B* | – | |
| Acetal (POM) | B* | – | |
| Nylon (PA) | B* | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A* | – | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | – | |
| NBR | C | C | |
| Metals | |||
| SS 316 | A* | – | |
| SS 304 | A* | – | |
| Aluminium | A | A | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: HDPE, LDPE, PVC Rigid, PVC Flexible, PMP, Polystyrene, SAN, PETG, Polysulfone, ECTFE/ETFE, Silicone
Resistance table: Potassium Chromate, saturated
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | – | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | A | |
| PVC Flexible | A | – | |
| PMP | A | – | |
| Polystyrene | A | A | |
| SAN | A | A | |
| Polycarbonate | B* | – | |
| Acetal (POM) | B* | – | |
| Nylon (PA) | B | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A* | – | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | – | |
| NBR | C | C | |
| Metals | |||
| SS 316 | A* | – | |
| SS 304 | A* | – | |
| Aluminium | A | A | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: PETG, Polysulfone, ECTFE/ETFE, Silicone
Rating scale
- A very good resistance
- B good resistance
- C limited resistance
- D not resistant
- – no data
- K no general statement possible
A rating marked * is an estimate in the source, not a test result. An estimate is given as one value without a temperature.
Frequently Asked Questions
Which materials resist Potassium Chromate at high concentrations?
The materials with an A rating (resistant) for Potassium Chromate at 20 °C are: PTFE, HDPE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316. These can generally be used in direct contact.
Does temperature affect chemical resistance to Potassium Chromate?
For Potassium Chromate, all tested materials maintain the same rating at both 20 °C and 50 °C.
Is PTFE safe for Potassium Chromate?
PTFE is rated A for Potassium Chromate at 20 °C. A rating of A means resistant, B means limited resistance, C means partly resistant, and D means not resistant.
Does concentration affect chemical resistance to Potassium Chromate?
Yes. Potassium Chromate is tested at 2 concentrations (aqueous, saturated). Some materials change their rating depending on the concentration.
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.
Chemicals with a similar resistance profile
Same 20 °C rating on the share of materials shown.