EN ISO 374-1: 2016
Protective gloves against dangerous chemicals and micro-organisms

Part 1: Terminology and performance requirements

Classified into three levels:      
Type A:             Glove to resist permeation from six chemicals for at least 30 minutes.
Type B:             Glove to resist permeation from three chemicals for at least 30 minutes.
Type C:             Glove to resist permeation from one chemicals for at least 10 minutes.

Table regarding permeation:
Breakthrough time        Index
> 10 min                         Level 1
> 30 min                         Level 2
> 60 min                         Level 3
> 120 min                       Level 4
> 240 min                       Level 5
> 480 min                       Level 6

Defined chemicals and related code:

Code     Chemical  
A            Methanol
B            Acetone
C            Acetonitrile
D            Dichloromethane
E            Carbon disulphide
F            Toluene
G            Diethylamine
H            Tetrahydrofuran
I              Ethyl acetateJn-Heptane
K            Sodium hydroxide 40 %
L            Sulphuric acid 96 %
M            Nitric acid 65 %
N            Acetic acid 99 %
O            Ammonium hydroxide 25 %
P            Hydrogen peroxide 30 %
S            Hydrofluoric acid 40 %
T            Formaldehyde 37 %

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