Standard EN374
Gloves Providing Protection from Chemicals and Mico Organisms

This standard explains the capability of a glove to protect the user against chemicals and/or micro-organisms. There are 3 pictograms which relate to this EN standard:

Standard EN374 Resistance to Water PenetrationDetermination of Resistance to Water Penetration

This measures glove quality, gloves must pass this test in order to prove that they provide an effective barrier against liquids and microorganisms. This tests for leakages, pin holes or other imperfections in the glove material. Gloves are graded according to the acceptable quality levels (AQL) of the gloves and must meet the minimum of AQL level 2 to carry this pictogram.

This is measured in ascending order from level 1-3:

  • Level 1 – AQL 4.0
  • Level 2 – AQL 1.5
  • Level 3 – AQL 0.65

Standard EN374 Resistance to Permeation by ChemicalsDetermination of Resistance to Permeation by Chemicals

This measures the time it takes for a chemical to break through the glove material. Multiple samples from the palm of the tested glove have chemicals placed onto the surface of the sample. The time it takes for the chemical to pass through to the inside of the sample is known as the breakthrough time. This is then graded from level 0-6:

Measured Breakthrough Time Performance Level
> 10 minutes Level 1
> 30 minutes Level 2
> 60 minutes Level 3
> 120 minutes Level 4
> 240 minutes Level 5
> 480 minutes Level 6

Gloves need to have a breakthrough time of at least 30 minutes for 3 out of 12 standard defined chemicals to carry this pictogram. Chemicals are identified by the letters below:

Code Chemical CAS Number* Class
A Methanol 67-56-1 Primary Alcohol
B Acetone 67-64-1 Ketone
C Acetonitrile 75-05-08 Nitrile Compound
D Dichloromethane 75-09-2 Chlorinated Paraffin
E Carbon Disulfide 75-15-0 Sulphur containing Organic compound
F Toluen 108-88-3 Aromatic Hydrocarbon
G Diethylamine 109-89-7 Amine
H Tetrahydrofurane 109-99-9 Heterocyclic and Ether compount
I Ethyl Acetate 141-78-6 Ether
J n-Heptan 142-85-5 Saturated Hydrocarbon
K Sodium Hydroxide 40% 1310-73-2 Inorganic Base
L Sulphuric Acid 96% 7664-93-9 Inorganic Mineral Acid

*CAS Number is a unique numerical identifier assigned by Chemical Abstracts Service (CAS) to every chemical substance.

Standard EN374 Low Chemical ResistanceLow Chemical Resistance

Gloves that have passed the initial penetration test, but have not achieved a breakthrough time of at least 30 minutes for a minimum of 3 of the standard defined chemicals will show this pictogram. This is also known as the waterproof glove pictogram.

 

 

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