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The standard defines a list of 18 chemicals. The minimum breakthrough time for a Type A glove is 30 mins (Level 2) for 6 chemicals, for a Type B it is 30 mins for at least 3 chemicals, and for Type C it is 10 mins (Level 1) for at least 1 chemical on the list.

The chemical resistant glove pictogram must be accompanied by code letters for the tested chemicals for Type A and Type B gloves. Type C marked gloves are without any code letter.

List of chemicals:

Letter code Chemical CAS number Class

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 hydrocarbon

E Carbon disulphide 75-15-0 Organic compound containing sulphur

F Toluene 108-88-3 Aromatic hydrocarbon

G Diethylamine 109-89-7 Amine

H Tetrahydrofurane 109-99-9 Heterocyclic ether

I Ethyl acetate 141-78-6 Ester

J n-Heptane 142-82-5 Saturated hydrocarbon

K Caustic soda 40% 1310-73-2 Inorganic base

L Sulfuric acid 97% 7664-93-9 Inorganic mineral acid

M 65% Nitric acid 7697-37-2 Inorganic mineral acid, oxidizing

N 99% Acetic acid 64-19-7 Organic acid

O 25% Ammonium hydroxide 1336-21-6 Organic base

P 30% Hydrogen peroxide 7722-84-1 Peroxide

S 40% Hydrofluoric acid 7664-39-3 Inorganic mineral acid, contact poison

T 37% Formaldehyde 50-00-0 Aldehyde

EN ISO 374-5: 2016 Protection against micro-organisms

EN 16523-1: 2015 (replaces EN 374-3) Resistance to chemical permeation

Transition period until 21st April 2023

From 21/04/2018

Micro-organisms are defined by the standard as bacteria, fungi or viruses. To claim resistance to bacteria and fungi the glove must pass the penetration resistance test according to standard EN 374-5: 2016. If the glove passes ISO 16604: 2004 (method B) test it can claim resistance to viruses as well, and the term VIRUS will be added below the biohazard pictogram.

Test method to measure the resistance of the PPE material to permeation by hazardous chemicals at molecular level and under continuous contact. The resulting value is the breakthrough time or the time needed by the hazardous liquid or gas to get in contact with the skin. The glove is classified in terms of breakthrough time performance level 1 to 6.

Measured breakthrough time

Permeation performance index

> 10 1 > 30 2 > 60 3 > 120 4 > 240 5 > 480 6

Type of gloves Breakthrough time

A ≥30 min for at least 6 chemicals

B ≥30 min for at least 3 chemicals

C ≥10 min for at least 1 chemical

EN ISO 374-5 EN ISO 374-5

A B C

VIRUS

UVWXYZ XYZ

N EW

C H

EM IC

A LS

See more at ChemRest.com

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