

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
 TYPE A
Step time ≥ 30 min for at least 6 products
 TYPE B
  TYPE B
Step time ≥ 30 min for at least 3 products
 TYPE C
 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.