MenuMenu

EN 374

Gloves Giving Protection from Chemicals and Micro-Organisms








In many contries there are more than 15 000 different chemicals in use in more than 60 000 products within industry, construction, agriculture etc. Tested and approved chemical gloves are the right solution against many of this chemicals.
You have to find out the name of the chemical and approximately how long time you need to be in contact with the chemical. Than we will help you to find the correct kind of glove.
The chemical gloves that is not approved according to EN 374-2004, but is approved according to the old EN 374-1994 have the pictogram (1). EN 374-1994 is still relevant. If the chemical glove are approved according to EN 374-2004 have the pictogram (2).

Scope

This standard specifies the capability of gloves to protect the user against chemicals and/or micro-organisms.

Definitions - The gloves length of life.

Degradation is rated according to the change in integrity following chemical exposure. The rate of degradation depends on which chemical the glove has come in contact with.

Penetration - is the flow of chemicals and micro-organisms through the porous material, seams, small holes or other small defects in the glove material.

Permeation - is the process where a chemical passes through the glove’s material on a molecular level. Permeation means the following: a chemical’s molecules penetration through the outer material of the glove. Diffusion is the movement of molecules through the material. Desorption is the outward flow of molecules from inside the glove.

Requirements

  • Minimum liquid proof section: The minimum liquid proof section of the glove shall be at least equal to the minimum length of the gloves specified in EN 420.

  • Penetration: A glove shall not leak when tested to an air and/or water leak test, and shall be tested and inspected in compliance with the Acceptable Quality Level.


 

Performance level Acceptable quality level unit Inspection levels
Level 3 > 0.65 G1
Level 2 > 1.5 G1
Level 1 > 4.0 S4

The ‘Chemical resistant’ glove pictogram must be accompanied by a 3-digit code. This code refers to the code letters of 3 chemicals (from a list of 12 standard defined chemicals), for which a breakthrough time of at least 30 minutes has been obtained.

 
Code letter Chemical Cas number Category
A
Methanol
67-56-1
Primary alcohol
B
Acetone
67-64-1
Ketone
C
Acetonitrile
75-05-8
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
Tetrahydrofuran
109-99-9
Heterocyclic and ethereal compound
I
Ethyl acetate
141-78-6
Ester
J
n-Heptan
142-85-5
Saturated hydrocarbon
K
Sodium hydroxide 40%
1310-73-2
Inorganic base
L
Sulfuric acid 96%
7664-93-9
Inorganic mineral acid
 
  • Permeation: Each chemical tested is classified in terms of breakthrough time (performance level 0 to 6).

 
Measured breakthrough time Protection Index Measured breakthrough time Protection Index
> 10 minutes class 1 > 120 minutes class 4
> 30 minutes class 2 > 240 minutes class 5
> 60 minutes class 3 > 480 minutes class 6


The ‘Low Chemical resistant’ or ‘Waterproof ’ glove pictogram is to be used for those gloves that do not achieve a breakthrough time of at least 30 minutes against at least three chemicals from the defined list, but which comply with the Penetration test.

The ‘Micro-organism’ pictogram is to be used when the glove conforms to at least a performance level 2 for the Penetration test.

The chart below will help you select the right material suitable against different types of chemicals.

 
Chemical group Natural rubber Nitrile Neoprene PVC PVA Butyl
Solvents
X X - - -  
Ketones
X - X - X X
Acids
X X X X    
Hydrocarbons
- X X - -  
Oils
- X X X X  
Greases
- X X X X  
Organic solvents
- X X - -  
 

Warning: The chemical data information does not necessarily reflect the actual duration in the workplace.