At a glance
Ratings at 20 °C.
- Rated A, very good resistance
- PTFE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316, SS 304, Aluminium, LDPE, FEP, ECTFE/ETFE, Nylon (PA), Polycarbonate, Polystyrene, PMP (16)
- Rated B, good resistance
- none (0)
- Rated C, limited resistance
- NBR, Acetal (POM), PETG (3)
- Rated D, not resistant
- none (0)
- No data in the source
- HDPE, Silicone, PVC Flexible, Polysulfone, SAN
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
- 10588-01-9
- Formula
- Na2Cr2O7
- Hazard symbols in the source
- T (toxic) (pre-GHS European symbols; check the current safety data sheet)
- Also listed as
- Sodium pyrochromate; Sodium bichromate
- Name in the source (German)
- Natriumdichromat
Resistance table
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | A | – | |
| PMP | A | A | |
| Polystyrene | A | A | |
| Polycarbonate | A | – | |
| PETG | C | – | |
| Acetal (POM) | C* | – | |
| Nylon (PA) | A | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A* | – | |
| PVDF | A | A | |
| ECTFE/ETFE | 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, PVC Flexible, SAN, Polysulfone, 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 Sodium Dichromate at high concentrations?
The materials with an A rating (resistant) for Sodium Dichromate at 20 °C are: PTFE, PP, PVDF, PVC Rigid, EPDM, Viton (FPM), SS 316, SS 304. These can generally be used in direct contact.
Does temperature affect chemical resistance to Sodium Dichromate?
For Sodium Dichromate, all tested materials maintain the same rating at both 20 °C and 50 °C.
Is PTFE safe for Sodium Dichromate?
PTFE is rated A for Sodium Dichromate at 20 °C. A rating of A means resistant, B means limited resistance, C means partly resistant, and D means not resistant.
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.