Summary
- PMP is rated better with
- Alkalis (+55 points); Mineral acids (+51 points); Oxidising agents and halogens (+38 points); Ketones and aldehydes (+16 points); Organic acids (+15 points)
- PETG is rated better with
- Vegetable and animal oils, fats, essential oils (+71 points); Fuels, mineral oils and aliphatic hydrocarbons (+68 points); Halogenated hydrocarbons (+29 points); Amines and nitrogen compounds (+28 points); Esters and ethers (+21 points)
- Within 10 points of each other
- Salts and salt solutions; Alcohols and glycols; Foods and beverages
Points are the difference in the share of rows rated A or B.
The two materials
PMP
Polymethylpentene (TPX)
Polymethylpentene (TPX) is a transparent polyolefin used for labware. It resists many acids and alkalis, while aromatic and chlorinated solvents and strong oxidisers attack it.
Rated rows: 416. A 55 %, B 6 %, C 7 %, D 32 %
PETG
Polyethylene terephthalate glycol (co-polyester)
PETG is a co-polyester for clear containers. Strong acids and alkalis and most organic solvents attack it.
Rated rows: 619. A 55 %, B 23 %, C 4 %, D 18 %
Share of rows rated A or B, by chemical class
How often the two ratings agree
Chemical classes were assigned by this site, not by the source. Mixtures and trade products without a clear class are not counted.
By chemical class
| Chemical class | PMP: rated A or B | PETG: rated A or B |
|---|---|---|
| Mineral acids | 71 % (35 rows) | 20 % (41 rows) |
| Organic acids | 85 % (26 rows) | 70 % (33 rows) |
| Alkalis | 100 % (17 rows) | 45 % (20 rows) |
| Salts and salt solutions | 100 % (67 rows) | 100 % (159 rows) |
| Oxidising agents and halogens | 67 % (30 rows) | 29 % (38 rows) |
| Alcohols and glycols | 96 % (28 rows) | 100 % (40 rows) |
| Ketones and aldehydes | 37 % (27 rows) | 21 % (24 rows) |
| Esters and ethers | 36 % (42 rows) | 57 % (28 rows) |
| Amines and nitrogen compounds | 50 % (10 rows) | 78 % (9 rows) |
| Aromatic hydrocarbons | 10 % (10 rows) | – |
| Fuels, mineral oils and aliphatic hydrocarbons | 30 % (37 rows) | 98 % (65 rows) |
| Vegetable and animal oils, fats, essential oils | 29 % (14 rows) | 100 % (34 rows) |
| Halogenated hydrocarbons | 3 % (33 rows) | 32 % (25 rows) |
| Foods and beverages | 100 % (13 rows) | 100 % (43 rows) |
Where the ratings differ most
Rows where the two ratings at 20 °C are at least two grades apart: 83 in total, the first 40 shown.
| Chemical | Concentration | PMP | PETG |
|---|---|---|---|
| 1,3-Butadiene | D | A | |
| Acetic Acid | 90 % | A | D |
| Battery Acid | 38 % | A | D |
| Benzaldehyde | A | D | |
| Bitter Almond Oil | A | D | |
| Bromochloromethane | 100 % | D | A |
| Carbon Tetrachloride | D | A | |
| Chloroacetic Acid | A | D | |
| Chlorobenzene | D | A | |
| Cyclohexane | D | A | |
| Dibutyl Ether | technical grade | D | A |
| Diethyl Ether | technical grade | D | A |
| Hexene | D | A | |
| Hydrochloric Acid | 35 % | A | D |
| Hydrochloric Acid | concentrated | A | D |
| Hydrofluoric Acid | 4 % | A | D |
| Hydrofluoric Acid | 50 % | A | D |
| Isooctane | technical grade | D | A |
| Isopropyl Ether | technical grade | D | A |
| Lemon Peel Oil | D | A | |
| Methylcyclohexane | D | A | |
| Methylcyclopentane | D | A | |
| Nitrobenzene | D | A | |
| Nitrotoluene | technical grade | D | A |
| Phenol | 10 % | A | D |
| Phenol | 100 % | A | D |
| Potassium Hydroxide | 1 % | A | D |
| Potassium Hydroxide | 30 % | A | D |
| Potassium Hydroxide | 50 % | A | D |
| Potassium Hydroxide | concentrated | A | D |
| Propane | gaseous | D | A |
| Regular Fuel | D | A | |
| Sodium Hydroxide (Caustic Soda) | 30 % | A | D |
| Sodium Hydroxide (Caustic Soda) | 45 % | A | D |
| Sodium Hydroxide (Caustic Soda) | 50 % | A | D |
| Sodium Hydroxide (Caustic Soda) | 60 % | A | D |
| Styrene | 100 % | D | A |
| Sulfuric Acid | 40 % | A | D |
| Sulfuric Acid | 60 % | A | D |
| Sulfuric Acid | 80 % | A | D |
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.
More comparisons
Frequently Asked Questions
Is PMP or PETG more chemical-resistant?
Of 292 chemicals rated for both materials at 20 °C, PMP and PETG share the same rating in 145 rows (50 %). PMP is rated better in 96 rows and PETG in 51 rows.
How do PMP and PETG compare for chemical resistance?
Based on 292 chemicals tested for both: PMP is rated better with Alkalis, Mineral acids, Oxidising agents and halogens, Ketones and aldehydes. PETG is rated better with Vegetable and animal oils, fats, essential oils, Fuels, mineral oils and aliphatic hydrocarbons, Halogenated hydrocarbons, Amines and nitrogen compounds. They perform similarly with Salts and salt solutions, Alcohols and glycols, Foods and beverages.
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.