At a glance
Based on the row for 1 % aqueous, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, PVC Rigid, Viton (FPM), SS 316, SS 304, Aluminium, LDPE, FEP (11)
- Rated B, good resistance
- none (0)
- Rated C, limited resistance
- EPDM, NBR, Nylon (PA), Acetal (POM), Polycarbonate (5)
- Rated D, not resistant
- PVC Flexible (1)
- No data in the source
- ECTFE/ETFE, Silicone, Polystyrene, Polysulfone, PETG, PMP, SAN
- Rated lower at 50 °C than at 20 °C
- NBR (C → D)
Based on the row for 1 % aqueous, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 88-89-1
- Formula
- C6H3N3O7
- Hazard symbols in the source
- T (toxic) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- 1 % aqueous
- Name in the source (German)
- Pikrinsäure
Resistance table: Picric Acid, 1 % aqueous
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | – | |
| LDPE | A | – | |
| PP | A | A | |
| PVC Rigid | A | – | |
| PVC Flexible | D | D | |
| Polycarbonate | C* | – | |
| Acetal (POM) | C* | – | |
| Nylon (PA) | C | – | |
| Fluoropolymers | |||
| PTFE | A | – | |
| FEP | A | – | |
| PVDF | A | A | |
| Elastomers | |||
| EPDM | C | – | |
| Viton (FPM) | A | – | |
| NBR | C | D | |
| Metals | |||
| SS 316 | A | – | |
| SS 304 | A | – | |
| Aluminium | A | – | |
* estimated rating, given in the source without a temperature
Not rated in the source, so not in the table: PMP, Polystyrene, SAN, 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 Picric Acid at high concentrations?
The materials with an A rating (resistant) for Picric Acid at 20 °C are: PTFE, HDPE, PP, PVDF, PVC Rigid, Viton (FPM), SS 316, SS 304. These can generally be used in direct contact.
Which materials should be avoided with Picric Acid?
Materials rated D (not resistant) for Picric Acid are: PVC Flexible. These should not be used in contact with Picric Acid.
Does temperature affect chemical resistance to Picric Acid?
Yes. 1 of 4 tested materials show a worse rating at 50 °C than at 20 °C for Picric Acid. Materials affected include: NBR.
Is PTFE safe for Picric Acid?
PTFE is rated A for Picric Acid 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.