At a glance
Based on the row for concentration not stated, 20 °C.
- Rated A, very good resistance
- PTFE, HDPE, PP, PVDF, EPDM, Viton (FPM), NBR, SS 316, SS 304, Aluminium, LDPE, FEP, ECTFE/ETFE, Nylon (PA), Acetal (POM), Polycarbonate, Polystyrene, PETG, PMP, SAN (20)
- Rated B, good resistance
- PVC Rigid (1)
- Rated C, limited resistance
- PVC Flexible, Polysulfone (2)
- Rated D, not resistant
- none (0)
- No data in the source
- Silicone
- Rated lower at 50 °C than at 20 °C
- PVC Rigid (B → D), Polystyrene (A → B), PMP (A → B)
Based on the row for concentration not stated, 20 °C.
Rating profile by material family
Effect of temperature, 20 °C to 50 °C
Substance
- CAS number
- 57-13-6
- Formula
- CH4N2O
- Hazard symbols in the source
- Xi (irritant) (pre-GHS European symbols; check the current safety data sheet)
- Concentrations listed
- aqueous; concentration not stated
- Name in the source (German)
- Harnstoff
Rating by concentration
Show as a table
| Material | aqueous | concentration not stated |
|---|---|---|
| Thermoplastics | ||
| HDPE | A | A |
| LDPE | A | A |
| PP | A | A |
| PVC Rigid | – | B |
| PVC Flexible | – | C |
| PMP | – | A |
| Polystyrene | – | A |
| SAN | – | A |
| Polycarbonate | A | A |
| PETG | A | A |
| Acetal (POM) | A | A |
| Nylon (PA) | A | A |
| Polysulfone | – | C |
| Fluoropolymers | ||
| PTFE | A | A |
| FEP | A | A |
| PVDF | A | A |
| ECTFE/ETFE | A | A |
| Elastomers | ||
| EPDM | A | A |
| Viton (FPM) | A | A |
| NBR | A | A |
| Silicone | – | – |
| Metals | ||
| SS 316 | A | A |
| SS 304 | A | A |
| Aluminium | A | A |
Resistance table: Urea, aqueous
Remark: Urea, Carbamid u.a.
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| Polycarbonate | A | A | |
| PETG | A | – | |
| Acetal (POM) | A | A | |
| Nylon (PA) | A | – | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | A | |
| ECTFE/ETFE | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | A | |
| NBR | A | A | |
| Metals | |||
| SS 316 | A | – | |
| SS 304 | A | – | |
| Aluminium | A | A | |
Not rated in the source, so not in the table: PVC Rigid, PVC Flexible, PMP, Polystyrene, SAN, Polysulfone, Silicone
Resistance table: Urea, concentration not stated
Remark: Urea, Carbamid u.a.
| Material | 20 °C | 50 °C | Remark |
|---|---|---|---|
| Thermoplastics | |||
| HDPE | A | A | |
| LDPE | A | A | |
| PP | A | A | |
| PVC Rigid | B | D | |
| PVC Flexible | C | C | |
| PMP | A | B | |
| Polystyrene | A | B | |
| SAN | A | A | |
| Polycarbonate | A | A | |
| PETG | A | – | |
| Acetal (POM) | A | A | |
| Nylon (PA) | A | – | |
| Polysulfone | C | C | |
| Fluoropolymers | |||
| PTFE | A | A | |
| FEP | A | A | |
| PVDF | A | A | |
| ECTFE/ETFE | A | A | |
| Elastomers | |||
| EPDM | A | – | |
| Viton (FPM) | A | A | |
| NBR | A | A | |
| Metals | |||
| SS 316 | A | – | |
| SS 304 | A | – | |
| Aluminium | A | A | |
Not rated in the source, so not in the table: 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 Urea at high concentrations?
The materials with an A rating (resistant) for Urea at 20 °C are: PTFE, HDPE, PP, PVDF, EPDM, Viton (FPM), NBR, SS 316. These can generally be used in direct contact.
Does temperature affect chemical resistance to Urea?
Yes. 3 of 18 tested materials show a worse rating at 50 °C than at 20 °C for Urea. Materials affected include: PVC Rigid, Polystyrene, PMP.
Is PTFE safe for Urea?
PTFE is rated A for Urea 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 Urea?
Yes. Urea is tested at 2 concentrations (aqueous, concentration not stated). 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.