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When working with dangerous chemicals, you should always research what you will be exposed to and how to best protect yourself from it. Here is a question about working with a dangerous chemical: Does 3M make a respirator cartridge for isocyanate? For the sake of this discussion, I think it is important we all know a little bit about isocyanate. It is a powerful irritant of the mucous membranes, the gastrointestinal tract, and the respiratory system. You can neither smell nor tast …