

The EN374: 2003 standard is renamed ENISO374: 2016. The purpose of this standard is to classify gloves according to their behavior when exposed to chemical substances.
They are divided into the following parts:
EN ISO 374-1:2016 - Terminology and performance requirements for chemical risks.
EN 374-2:2014 - Determination of resistance to penetration.
EN 16523-1:2015 + A1:2018 - Permeation by liquid chemicals under continuous contact conditions.
EN ISO 374-4:2019 - Determination of resistance to chemical degradation.
EN ISO 374-5:2016 - Terminology and requirements demanded for risks of microorganisms.
Gloves classification according to ENISO374-1: 2016
 Gloves are divided into three types:
 TYPE A
Step time ≥ 30 min for at least 6 products
  TYPE B
Step time ≥ 30 min for at least 3 products
 TYPE C
Step time ≥ 10 min for at least 1 products
 
 
	
		
			| 
			 LETTER 
			 | 
			
			 CHEMICAL SUBSTANCE 
			 | 
			
			 CAS NUMBER 
			 | 
			
			 CLASS 
			 | 
		
		
			| 
			 A 
			 | 
			
			 Methanol 
			 | 
			
			 67-56-1 
			 | 
			
			 Primary alcohol 
			 | 
		
		
			| 
			 B 
			 | 
			
			 Acetone 
			 | 
			
			 67-64-1 
			 | 
			
			 Cetone 
			 | 
		
		
			| 
			 C 
			 | 
			
			 Acetonitrile 
			 | 
			
			 75-05-8 
			 | 
			
			 Nitrile compound 
			 | 
		
		
			| 
			 D 
			 | 
			
			 Dichloromethane 
			 | 
			
			 75-09-2 
			 | 
			
			 Chlorine hydrocarbon 
			 | 
		
		
			| 
			 E 
			 | 
			
			 Carbon disulfide 
			 | 
			
			 75-15-0 
			 | 
			
			 Sulphate organic compound 
			 | 
		
		
			| 
			 F 
			 | 
			
			 Toluene 
			 | 
			
			 108-88-3 
			 | 
			
			 Aromatic hydrocarbon 
			 | 
		
		
			| 
			 G 
			 | 
			
			 Diethylamine 
			 | 
			
			 109-89-7 
			 | 
			
			 Amine 
			 | 
		
		
			| 
			 H 
			 | 
			
			 Tetrahydrofuran 
			 | 
			
			 109-99-9 
			 | 
			
			 Heterocyclic ether 
			 | 
		
		
			| 
			 I 
			 | 
			
			 Ethyl acetate 
			 | 
			
			 141-78-6 
			 | 
			
			 Ester 
			 | 
		
		
			| 
			 J 
			 | 
			
			 n-heptane 
			 | 
			
			 142-85-5 
			 | 
			
			 Saturated hydrocarbon 
			 | 
		
		
			| 
			 K 
			 | 
			
			 Sodium Hydroxide 40% 
			 | 
			
			 1310-73-2 
			 | 
			
			 Inorganic alkaline 
			 | 
		
		
			| 
			 L 
			 | 
			
			 Sulphuric acid 96% 
			 | 
			
			 7664-93-9 
			 | 
			
			 Inorganic, oxidising mineral acid 
			 | 
		
		
			| 
			 M 
			 | 
			
			 Nitric acid 65% 
			 | 
			
			 7697-37-2 
			 | 
			
			 Inorganic, oxidising mineral acid 
			 | 
		
		
			| 
			 N 
			 | 
			
			 Acetic acid 99% 
			 | 
			
			 64-19-7 
			 | 
			
			 Organic acid 
			 | 
		
		
			| 
			 O 
			 | 
			
			 Ammonia Hydroxide 25% 
			 | 
			
			 1332-21-6 
			 | 
			
			 Organic Alkaline 
			 | 
		
		
			| 
			 P 
			 | 
			
			 Hydrogen peroxide 30% 
			 | 
			
			 7722-84-1 
			 | 
			
			 Peroxide 
			 | 
		
		
			| 
			 S 
			 | 
			
			 Hydrofluoric acid 40% 
			 | 
			
			 7664-39-3 
			 | 
			
			 Mineral organic acid 
			 | 
		
		
			| 
			 T 
			 | 
			
			 Formaldehyde 37% 
			 | 
			
			 50-00-0 
			 | 
			
			 Aldehyde 
			 | 
		
	
 
Levels of resistance to permeability
	
		
			| 
			 TAVERAGE PENETRATION TIME 
			 | 
			
			 PERFORMANCE LEVELS 
			 | 
			
			 AVERAGE PENETRATION TIME 
			 | 
			
			 PERFORMANCE LEVELS 
			 | 
		
	
	
		
			| 
			 > 10 
			 | 
			
			 Class 1 
			 | 
			
			 > 120 
			 | 
			
			 Class 4 
			 | 
		
		
			| 
			 > 30 
			 | 
			
			 Class 2 
			 | 
			
			 > 240 
			 | 
			
			 Class 5 
			 | 
		
		
			| 
			 > 60 
			 | 
			
			 Class 3 
			 | 
			
			 > 480 
			 | 
			
			 Class 6 
			 | 
		
	
 
 
 
Gloves classification according to EN374-2:2014
It is the advance of chemical products through the material, seams of the glove at a non-molecular level. Air leak test: the glove is inflated with air and immersed in water. The appearance of air bubbles is controlled within 30 '. Water leak test: the glove is filled with water and the appearance of water droplets is controlled. If these tests are positive, the pictogram will be put on.
Gloves classification according to EN374-4: 2013
Detriment to some of the glove's properties due to contact with a chemical. Eg: discoloration, hardening, softening, etc.Permeation test EN 16523-1. It is the advancement of chemicals at the molecular level. The resistance of the glove material to permeation by a chemical is determined by measuring the time it passes through the material.
Modification of the ENISO374-5: 2016 standard
When the glove passes the test described for virus protection, the word “virus” will appear under the pictogram. If nothing appeared, protection would only be assured against bacteria.