| High molecular weight (≥ 5 kDa) |
| Flours and grains |
bakers, food industry |
| Latex |
health care workers; producers and frequent users of latex products |
| Enzymes |
manufacture and use of detergents; pharmaceutical and food industries |
| Plant-derived products |
agricultural workers |
| Animals and animal-derived products |
laboratories, veterinaries, agricultural workers |
| Fungi |
offices, schools, cleaners |
| Low molecular weight (< 5 kDa) |
| Diisocyanates |
polyurethane production; foam production; automotive paint and polyurethane varnish; plastics industry |
| Persulfates |
hairdressers |
| Metals (chrome, nickel, cobalt, zinc, platinum salts) |
metal coatings (galvanization), welders, pharmaceutical industry, and refineries |
| Quaternary ammonium compounds |
cleaners |
| Acrylates |
dentists, adhesive resins, synthetic fabrics, printer inks, plastics industry, manicurists |
| Wood dust |
carpenters |
| Cleaning products: chloride, ammonia, glutaraldehyde |
cleaners and health care workers |
| Drugs (e.g., antibiotics) |
pharmaceutical industry |
| Phthalic and trimellitic anhydrides |
epoxy resin manufacture, spray paint workers |
