Page 4 - CBRN Overboots

CHEMICAL CAS NO. METHOD
BREAK THROUGH
Acetic acid (Glacial) 64-19-7 EN 16523 > 12 Hours
Acetone 67-64-1 EN374-3 > 2 Hours
Acetone Cyanohydrin 75-86-5 EN374-3 > 8 Hours
Acetonitrile 75-05-08 EN374-3 > 6 Hours
Acrylic Acid 79-10-7 EN374-3 > 8 Hours
Acrylonitrile 107-13-1 EN374-3 > 2 Hours
Ammonia 33% 1336-21-6 EN 16523 > 32 Hours
Ammonia Gas 7664-41-7 EN374-3 > 8 Hours
Ammonium Hydroxide Solution 5% free NH3
1336-21-6 EN 16523 > 32 Hours
Ammonium
Pentadecafluoro- 3825-26-1 EN374-3 > 8 Hours octanoate (30% in water)
Aniline 62-53-3 EN374-3 > 8 Hours
Anti-knock(Tetraethyl lead 60% Dibromoethane 30%/Dichloroethane 10% TEL-CB)
78-00-2 / 106-03-4 / 107-06-2
EN374-3 > 8 Hours
Aqueous Phenol 85% 108-95-2 EN374-3 > 8 Hours
Arsenic Acid 7778-39-4 EN374-3 > 8 Hours
Benzene 71-43-2 EN374-3 > 4 Hours
Benzyl Chloride 100-44-7 EN374-3 > 8 Hours
Bromine 7726-95-6 EN374-3 > 7 Hours
Buta-1,3diene Gas 106-99-0 EN374-3 > 3 Hours
Butyl Acetate 123-86-4 EN374-3 > 6 Hours
Cable oil EN374-3 > 8 Hours
Carbazole 86-74-8 EN374-3 > 8 Hours
Carbon Disulphide 75-15-0 EN374-3 > 1 Hour
Chlorine Gas 7782-50-5 EN374-3 > 3 Hours
Chloroacetic Acid 85% 79-11-8 EN 16523 > 32 Hours
Chromic Acid 1333-82-0 EN374-3 > 8 Hours
Cyclohexylamine 108-91-8 EN374-3 > 8 Hours
Dichloromethane 75-09-02 EN374-3 > 1 Hour
Diethylamine 109-89-7 EN374-3 > 2 Hours
Diethylene Glycol dimethylether
111-46-6 EN374-3 > 8 Hours
Dimethyl Formamide 68-12-2 EN374-3 > 8 Hours
Dimethylformamide 68-12-2 EN374-3 > 3 Hours
Epichlorohydrin 106-89-8 EN374-3 > 7 Hours
Ethanol (Ethyl Alcohol) 64-17-5 EN374-3 > 8 Hours
Ethyl Acetate 141-78-6 EN374-3 > 4 Hours
Ethylene Glycol 107-21-1 EN374-3 > 8 Hours
Ethylene Dichloride 107-06-2 EN374-3 > 8 Hours
Ethylene Oxide 75-21-8 EN374-3 > 2 Hours
CHEMICAL PERMEATION DATA CBRN OVERBOOT
There are three mechanisms that you need to consider when looking at the use of chemicals with personal protective equipment:
PENETRATION:
Chemical penetration is ingress through a material on
the non-molecular level - i.e. through holes, cracks, pores, seams etc. This is not an issue with moulded footwear until it starts to age (where on some compounds chemical or UV degradation can cause brittleness and cracking), but can be a big problem with leather or synthetic fabric footwear.
CHEMICAL PERMEATION:
Chemical Permeation is the process by which a chemical passes through a material at the molecular level. The rate of permeation will be determined by the material, its thickness and the temperature.
Actual Breakthrough Time - is the time that the chemical is first detected on the on the inner surface of the material, this will depend to an extent on the sensitivity of the detection equipment and method of analysis.
Normalised Breakthrough Time - is the time taken to reach a specific permeation rate (for European standards this
is defined as 0.1μg[min.cm2], for American standards it
is 1μg[min.cm2]). This is the measure used in permeation tables (such as the one on the following pages) as it will be consistent between testing laboratories.
DEGRADATION:
Degradation is the physical change to the material
caused by the chemical, which can include swelling, stiffening, wrinkling, changes in colour, and other physical deterioration. The slower the degradation occurs in the presence of a chemical, the more protective the material is for that specific chemical.