EN 374-3: 2003 Gloves providing protection against chemicals and microorganisms – Part 3: Determination of resistance to permeation by chemicals

This standard specifies the methods used to determine the resistance of protective glove materials to permeation by potentially hazardous non-gaseous chemicals that the glove has been in continuous contact with. Since these test methods do not endeavor to replicate conditions likely to be found on worksites, use of the results from these tests should be restricted to general comparisons of materials’ durability (e.g., breakthrough times). Gloves with the chemical resistant symbol have attained a level 2 protection score in the EN 374-2 test (see EN 374-2) in which gloves must achieve the same protection scores when exposed to water and any three of the following chemicals:

 Code letter  Chemical  CAS number  Category
 A  Methanol  67-56-1  Primary alcohol
 B  Acetone 67-64-1  Ketone 
 C  Acetonenitrile 75-05-8   Nitrile compound
 D  Dichloromethane 75-9-2   Chlorinated paraffin
 E  Carbon disulfide 75-15-0  Sulphur containing organic compound
 F  Toluene 108-88-3  Aromatic hyrdrocarbon
 G  Diethylamine  109-89-7  Amine
 H  Tetrhydrofuran (THF)  109-99-9  Heterocyclic and ethereal
 I  Ethyl acetate 141-78-6   Ester
 J n-Heptane 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 according to its breakthrough time (i.e., performance levels 0 to 6)

 Measured breakthrough time  Production index  Measured breakthrough time  Protection index
 >10 mitues  Class 1  >120 minutes  Class 4
 >30 minutes  Class 2  >240 minutes  Class 5
 >60 minutes  Class 3  >480 minutes  Class 6