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MERCANTA 2.0 Chemical Hazards Whether total immersion or merely splash is involved, any substance which could irritate, inflame or burn the skin is classified as a chemical hazard. Some substances may cause the skin to become sensitised over a period of time while other have an immediate and painful effect. Caution: Gloves with knitted wrists and/or open backs are not suitable for chemical protection! EN374 CHEMICAL HAZARDS The “Chemical resistant“ glove pictogram must be accompanied by a 3- digit code. This code refers to the code letters of 3 chemicals (from a list of 12 standard defined chemicals), for which a breakthrough time of at least 30 minutes has been obtained. e. g. : A F L RESISTANCE TO TEST CHEMICAL RANK (1 = lowest) PERMEATION TIME (EN 374 - 3) A METHANOL 1 — 6 Rank 1 > 10 min Rank 2 > 30 min Rank 3 > 60 min Rank 4 > 120 min Rank 5 > 240 min Rank 6 > 480 min B ACETONE 1 — 6 C ACETONITRILE 1 — 6 D DICHLOROMETHANE 1 — 6 E CARBON DISULFIDE 1 — 6 F TOLUEN 1 — 6 G DIETHYLAMINE 1 — 6 H TETRAHYDROFURAN 1 — 6 I ETHYL ACETATE 1 — 6 J n - HEPTAN 1 — 6 K SODIUM HYDROXIDE 40% 1 — 6 L SULFURIC ACID 96% 1 — 6 2.1 Category III — Mortal Risks (Complex Design) EN374 The “micro-organism” pictogram is to be used when the glove conforms to at least a performance level (=rank) 2 for the penetration test conducted with 3 out of the 12 test chemicals listed above. Such gloves are used in areas/applications that can seriously or irreversibly harm health. In addition to the CE type test, category III gloves will also have to be either produced under an approved quality system or to be type tested on an annual basis. 3.0 Thermal Hazards Thermal hazards come in many forms: Heat can be radiated or conducted, or it may be actual flames. Cold can be anything from cold water to frozen gases. It is important to know the type of hazard and the temperatures involved to select the suitable protection. 3.1. Thermal Hazards - Heat Contact heat: A sample is taken from the palm area of a glove. The outside of the glove is put on a hot surface and the temperature of the inside of the material is then monitored. The temperature of the inside of the glove must take min. 15 seconds to rise by 10°C from room temperature. 79

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