Trichloroethylene (TCE) is one of the solvents that will eventually work through nitrile, which is why gloves carry a breakthrough time rather than a claim of resistance forever. ASTM F739 measures how long it takes before a chemical is detected on the inside of the glove under continuous contact. For TCE, that window can be short, so glove choice and change-out interval matter more than the material label.
What does permeation testing actually measure?
Permeation testing puts the glove material between two chambers. The challenge chemical sits on one side and a collection medium on the other, and the lab watches for the chemical to appear on the inside face. The elapsed time until detection is the breakthrough time, and the rate at which it then moves is the permeation rate.
This is different from degradation testing, which looks at the physical damage a chemical does to the material. A glove can show no visible damage and still let a solvent through at the molecular level, so both tests answer different questions.
What do ASTM F739 and EN 374 each tell you?
| Test | Region | What it reports |
|---|---|---|
| ASTM F739 | North America | Breakthrough time and permeation rate for a specific chemical |
| EN 374 | Europe | Performance levels across a defined panel of chemicals |
| Degradation | Both | Physical change in the material after chemical contact |
Why is trichloroethylene a demanding solvent for nitrile?
TCE is a chlorinated solvent with low surface tension and high volatility, so it wets and penetrates polymer films more aggressively than many mild chemicals. Nitrile performs better than latex or vinyl against TCE, but even nitrile has a finite breakthrough time, which is why the standard practice is to treat any glove as a short-interval barrier rather than permanent protection.
Concentration, temperature and the specific nitrile formulation all shift the breakthrough time. A hotter solution or a purer solvent shortens the time before the chemical crosses the film.
How does thickness change performance with solvents?
All else equal, a thicker film buys more time before breakthrough. A 6 mil black nitrile glove provides a longer barrier window than a lighter examination glove, which makes it the better pick when handling solvents. A standard 4 mil blue nitrile glove is suited to exams and light tasks where solvent contact is brief or absent.
Thickness is not a licence to ignore breakthrough time. Even a heavy glove should be changed on a schedule set from the measured breakthrough time, not from a guess that it still feels fine.
How should a clinic set a safe change-out interval?
Start from the manufacturer breakthrough data for the chemical you actually handle, then apply a safety margin, typically a fraction of the measured breakthrough time. Document the interval in your chemical handling procedure and train staff to change gloves at or before that point, or immediately if a glove is contaminated or damaged.
If you want the wider testing picture, the nitrile glove collection groups the thickness grades side by side.
Ordering for a clinic, lab or care home? Wholesale and multi-site ordering covers case pricing and account setup, and the B2B wholesale collection lists the lines stocked for institutional buyers.
Related Reading
- ASTM F739 and EN 374 Chemical Permeation Testing for Gloves
- 4 mil vs 6 mil vs 8 mil: Which Nitrile Glove Thickness Is Right?
Not sure which consumable fits your set-up? Start with the BI 5-pack trial (CA $12.99, shipping included).
Frequently Asked Questions
Does nitrile protect against trichloroethylene?
Nitrile resists trichloroethylene better than latex or vinyl, but it still has a finite breakthrough time, so gloves must be changed within a measured safe interval.
What is the difference between breakthrough and degradation?
Breakthrough is the time a chemical takes to cross the glove film and appear inside, while degradation is the physical change the chemical causes to the material itself.
Does a thicker nitrile glove block solvent breakthrough completely?
No. A thicker glove extends the breakthrough time but does not block permeation permanently, so a documented change-out interval is still required.
CliniEco Medical is a licensed medical device establishment (MDEL #35334).
0 comments