When selecting a filtering device, a number of factors that can not be defined a priori and which can only be deduced from a correct and accurate risk analysis, must be considered.
The type of application, concentration, temperature, humidity, olfactory threshold, and individuality of the operator are just some of the aspects that contribute to the correct choice of the filter device.

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| Nombre de la sustancia | CAS Number | Fórmula | B.P.°C | Filtrar | Color ESA | Umbral Olfativo mg/m3 | TLV mg/m3 | TLV PPM | Physiological Action |
|---|---|---|---|---|---|---|---|---|---|
| Methylethylketone (MEK) | 78-93-3 | C4H8O | 80 | A | 0,7375 | 600 | 200,000 | narcótico irritante | |
| Nickel carbonyl | 13463-39-3 | Ni(CO)4 | 43 | COP3 |
|
0,21 | 0,01 | - | Mareos, trastornos de sangrado gástrico, carcinógeno |
| Nitrobenzene | 98-95-3 | C6H5NO2 | 211 | A | 0,0235 | 1 | 0,2 | Cianosis, dolor de cabeza, mareos, náuseas | |
| Nitroglycerin | 55-63-0 | C3H5N3O9 | 160 | B | - | 0,46 | 0,05 | Cefale, mareos, cirrosis, temblor | |
| Nitrogen Oxide | 10102-44-0 | NO2 | 21 | NO P3 |
|
2 | 0,96 | 0,5 | irritación de las vías respiratorias, tos, disnea, edema pulmonar |
| Carbon oxide | 630-08-0 | CO | -191,5 | CO | - | 23 | 20 | Altamente tóxico, náuseas, cefale, mareos | |
| Ethylene oxide | 75-21-8 | C2H4O | 10,7 | AX | 520 | 1,8 | 1 | , náuseas, problemas respiratorios altamente tóxicos | |
| Turpentine oil | 8006-64-2 | - | 160 | A | 560 | 28 | 5 | alteraciones visuales cefale, irritante | |
| Tetraethylplumbane | 78-00-2 | C8H20Pb | 84 | AP3 |
|
- | 0,05 | - | El insomnio, la hipotermia, temblores, dolor de cabeza, náuseas |
| Ethane trichloride | 79-00-5 | C2H3Cl3 | 74,1 | A | 542,8 | 1910 | 350 | Narcótico, irritante | |
| Pyridine | 110-86-1 | C5H5N | 115 | A | 0,009 | 16 | 5 | Narcotic, irritación, dolores de cabeza, eczema | |
| Powders | - | - | - | P3 | - | - | - | - | |
| Trichloroethylene | 79-01-6 | C2HCl3 | 87 | A | 1,134 | 82,2 | 10 | trastornos de dolor de cabeza de intoxicación gastici | |
| Propane | 74-98-6 | C3H8 | -42,1 | ** | - | 1800 | 1000 | Anestésico, asfixiante | |
| Trifluoromethane | 75-46-7 | CHF3 | -82,2 | *** | - | 5600C | 1000C | trastornos gástricos, dolores de cabeza, intoxicación | |
| Carbon disulfide | 75-15-0 | CS2 | 46,5 | AX | 0,0243 | 31 | 10 | Dolor de cabeza, mareos, delirio, vómitos | |
| Xylene | 1330-20-7 | C8H10 | 139,1 | A | 0,348 | 220 | 50 | Tóxico, irritante. carcinógeno | |
| Styrene | 100-42-5 | C8H8 | 146 | A | 0,43 | 86 | 20 | Miosi, fijeza, narcótico irritante | |
| TCE | 79-34-5 | C2H2Cl4 | 146 | A | 21 | 7 | 1 | trastornos de dolor de cabeza de intoxicación gastici | |
| TDI | 584-84-9 | C9H6N2O2 | 251 | A-P3 |
|
- | 0,035 | 0,005 | dermatitis, espasmo bronquial |