Respiratory Protection eTool
Using a Math Model Table to Determine a Cartridge's Service Life » Comparing Predicted Calculation with Experimental Data
The following table provides a comparison of breakthrough times calculated using the Wood† model versus experimental data‡. The percent variation of the calculated from the experimental values is also presented.
- † Wood, G.O., Estimating Service Lives of Organic Vapor Cartridges, American Industrial Hygiene Association Journal, 55:11-15 (1994).
- ‡ Nelson, G.O., A.N. Correia, Respirator cartridge efficiency studies: VIII. Summary and conclusions, American Industrial Hygiene Association Journal, 37:514-525 (1976).
OSHA used the following standard conditions:
- Contaminant concentration: 1000 ppm
- Number of respirator cartridges: 2
- Sorbent: Activated charcoal, the specific source varied with manufacturer
- Sorbent mass per cartridge:
- Experimental - 25-40 g, the amount varied with manufacturer
- Calculated - 26 g
- Flow rate: 53.3 liters per minute
- Temperature: 22 degrees Celsius
- Relative humidity: 50%
- Preconditioning humidity: 50% (for experimental)
|
Compound Name |
1% Breakthrough |
10% Breakthrough |
||||
|---|---|---|---|---|---|---|
|
|
Model | Experimental | Model vs Exp. | Model | Experimental | Model vs Exp. |
| Aromatics | ||||||
| Benzene |
56 |
73 |
-22.3% |
68 |
88 |
-23.1% |
| Toluene |
61 |
94 |
-34.5% |
72 |
114 |
-36.4% |
| Ethylbenzene |
60 |
83 |
-27.4% |
70 |
105 |
-33.1% |
| m-Xylene |
60 |
98 |
-38.3% |
70 |
116 |
-39.3% |
| Cumene |
56 |
81 |
-30.5% |
64 |
103 |
-37.2% |
| Mesitylene |
57 |
85 |
-33.3% |
65 |
105 |
-37.6% |
| p-Cymene |
52 |
75 |
-30.8% |
59 |
92 |
-36.0% |
| Alcohols | ||||||
| Methanol |
2 |
0 |
990.0% |
5 |
3 |
54.3% |
| Ethanol |
30 |
28 |
7.1% |
43 |
45 |
-4.8% |
| Isopropanol |
47 |
54 |
-12.1% |
61 |
81 |
-24.8% |
| Allyl alcohol |
69 |
65 |
5.9% |
87 |
105 |
-16.5% |
| Propanol |
56 |
85 |
-34.2% |
73 |
123 |
-40.5% |
| sec-Butanol |
58 |
96 |
-38.7% |
72 |
121 |
-39.8% |
| Butanol |
68 |
115 |
-40.3% |
84 |
141 |
-40.3% |
| 2-Pentanol |
63 |
86 |
-27.4% |
75 |
111 |
-32.2% |
| 3-Methyl-1-butanol |
66 |
97 |
-31.9% |
78 |
121 |
-34.8% |
| 4-Methyl-2-pentanol |
57 |
75 |
-23.2% |
67 |
96 |
-29.4% |
| Pentanol |
66 |
103 |
-35.1% |
79 |
130 |
-38.6% |
| 2-Ethyl-1-butanol |
61 |
76 |
-19.2% |
72 |
101 |
-28.3% |
| Monochlorides | ||||||
| Methyl chloride |
2 |
0 |
3821.5% |
2 |
0 |
320.8% |
| Vinyl chloride |
7 |
3 |
94.6% |
9 |
6 |
44.5% |
| Ethyl chloride |
18 |
5 |
220.2% |
22 |
10 |
114.0% |
| 2-Chloropropane |
27 |
26 |
5.7% |
34 |
35 |
-4.7% |
| Allyl chloride |
32 |
30 |
5.9% |
40 |
44 |
-9.6% |
| 1-Chloropropane |
43 |
24 |
78.3% |
52 |
38 |
36.9% |
| 2-Chloro-2-methylpropane |
46 |
37 |
23.7% |
54 |
52 |
3.6% |
| 1-Chlorobutane |
51 |
72 |
-28.1% |
61 |
88 |
-30.4% |
| 2-Chloro-2-methylbutane |
46 |
58 |
-20.2% |
55 |
79 |
-30.3% |
| 1-Chloropentane |
52 |
74 |
-29.1% |
62 |
96 |
-35.6% |
| Chlorocyclopentane |
|
77 |
|
|
106 |
|
| Chlorobenzene |
72 |
107 |
-32.6% |
83 |
131 |
-36.3% |
| 1-Chlorohexane |
53 |
77 |
-30.6% |
62 |
95 |
-35.1% |
| o-Chlorotoluene |
65 |
102 |
-35.3% |
76 |
122 |
-37.5% |
| 1-Chloroheptane |
49 |
81 |
-39.7% |
56 |
101 |
-44.1% |
| 3-(Chloromethyl) heptane |
42 |
63 |
-33.1% |
48 |
80 |
-40.1% |
| Dichlorides | ||||||
| Dichloromethane |
21 |
10 |
111.8% |
28 |
15 |
77.8% |
| trans-1,2-Dichloroethylene |
35 |
33 |
7.5% |
44 |
50 |
-12.1% |
| 1,1-Dichloroethane |
29 |
23 |
24.4% |
35 |
40 |
-10.4% |
| cis-1,2-Dichloroethylene |
40 |
29 |
36.5% |
50 |
42 |
19.2% |
| 1,2-Dichloroethane |
48 |
54 |
-10.7% |
60 |
79 |
-24.3% |
| 1,2-Dichloropropane |
55 |
65 |
-14.0% |
67 |
90 |
-25.6% |
| cis-1,2-Dichloropropene |
|
85 |
|
|
110 |
|
| trans-1,2-Dichloropropene |
|
108 |
|
|
129 |
|
| 1,4-Dichlorobutane |
54 |
109 |
-49.9% |
64 |
132 |
-51.3% |
| o-Dichlorobenzene |
70 |
|
|
81 |
|
|
| Trichlorides | ||||||
| Chloroform |
42 |
33 |
27.7% |
52 |
52 |
0.0% |
| Methyl chloroform |
48 |
40 |
19.3% |
57 |
58 |
-1.8% |
| Trichloroethylene |
56 |
55 |
2.7% |
68 |
83 |
-17.7% |
| 1,1,2-Trichloroethane |
65 |
71 |
-9.4% |
77 |
112 |
-30.4% |
| 1,2,3-Trichloropropane |
69 |
111 |
-37.5% |
81 |
132 |
-38.2% |
| Tetrachlorides | ||||||
| Carbon tetrachloride |
51 |
77 |
-33.1% |
61 |
90 |
-31.5% |
| Perchloroethylene |
65 |
107 |
-38.5% |
77 |
129 |
-40.0% |
| 1,1,2,2-Tetrachloroethane |
69 |
104 |
-33.2% |
81 |
131 |
-37.7% |
| Pentachlorides | ||||||
| Pentachloroethane |
63 |
93 |
-31.5% |
73 |
117 |
-36.8% |
| Acetates | ||||||
| Methyl acetate |
27 |
32 |
-14.9% |
36 |
46 |
-22.3% |
| Vinyl acetate |
39 |
55 |
-27.8% |
49 |
81 |
-39.0% |
| Ethyl acetate |
43 |
66 |
-35.1% |
53 |
84 |
-37.1% |
| Isopropyl acetate |
47 |
64 |
-26.8% |
56 |
85 |
-34.2% |
| Isopropenyl acetate |
|
80 |
|
|
106 |
|
| Propyl acetate |
51 |
78 |
-34.6% |
61 |
99 |
-37.9% |
| Allyl acetate |
|
75 |
|
|
95 |
|
| sec-Butyl acetate |
|
82 |
|
|
101 |
|
| Butyl acetate |
53 |
77 |
-31.1% |
62 |
96 |
-35.7% |
| Isopentyl acetate |
51 |
70 |
-26.9% |
59 |
88 |
-32.3% |
| 1,3-Dimethylbutyl acetate |
|
60 |
|
|
76 |
|
| Pentyl acetate |
52 |
72 |
-28.2% |
60 |
87 |
-31.2% |
| Hexyl acetate |
48 |
67 |
-28.2% |
55 |
85 |
-35.4% |
| Ketones | ||||||
| Acetone |
23 |
37 |
-37.7% |
30 |
46 |
-33.4% |
| 2-Butanone |
42 |
81 |
-48.2% |
52 |
94 |
-43.9% |
| 2-Pentanone |
52 |
104 |
-49.8% |
62 |
121 |
-48.0% |
| 3-Pentanone |
53 |
93 |
-43.3% |
63 |
114 |
-44.0% |
| 4-Methyl-2-pentanone |
53 |
96 |
-44.8% |
62 |
111 |
-43.7% |
| Mesityl oxide |
61 |
122 |
-49.8% |
72 |
139 |
-48.2% |
| Cyclopentanone |
68 |
141 |
-51.5% |
83 |
161 |
-48.3% |
| 2,4-Pentanedione |
65 |
130 |
-49.7% |
78 |
144 |
-45.7% |
| 3-Heptanone |
54 |
91 |
-40.1% |
63 |
105 |
-39.7% |
| 2-Heptanone |
47 |
101 |
-53.4% |
54 |
114 |
-52.1% |
| Cyclohexanone |
68 |
126 |
-45.3% |
81 |
144 |
-43.1% |
| 5-Methyl-3-heptanone |
|
86 |
|
|
99 |
|
| 3-Methylcyclohexanone |
|
100 |
|
|
123 |
|
| Diisobutyl ketone |
46 |
70 |
-34.8% |
52 |
83 |
-37.0% |
| 4-Methylcyclohexanone |
|
111 |
|
|
126 |
|
| Alkanes | ||||||
| Pentane |
30 |
60 |
-49.4% |
37 |
71 |
-48.1% |
| 2,3-Dimethylbutane |
38 |
72 |
-46.3% |
45 |
81 |
-43.8% |
| Hexane |
40 |
52 |
-21.9% |
48 |
64 |
-25.6% |
| Methylcyclopentane |
45 |
62 |
-27.3% |
53 |
76 |
-29.5% |
| Cyclohexane |
49 |
68 |
-28.3% |
58 |
82 |
-29.0% |
| 2,2,4-Trimethylpentane |
42 |
68 |
|
48 |
80 |
|
| Heptane |
45 |
78 |
-33.3% |
52 |
89 |
-34.3% |
| Methylcyclohexane |
51 |
68 |
-34.7% |
59 |
80 |
-33.8% |
| 1,3,5-Cycloheptatriene |
|
121 |
|
|
136 |
|
| 2,2,5-Trimethylhexane |
42 |
67 |
-64.8% |
48 |
80 |
-64.4% |
| 5-Ethylidene-2-orbornene |
|
86 |
|
|
101 |
|
| Cyclooctane |
46 |
96 |
-46.8% |
53 |
113 |
-47.4% |
| Nonane |
44 |
76 |
-53.7% |
51 |
89 |
-54.7% |
| Decane |
42 |
70 |
-44.3% |
48 |
81 |
-46.2% |
| Amines | ||||||
| Methylamine |
1 |
12 |
-89.5% |
2 |
17 |
-88.8% |
| Dimethylamine |
10 |
17 |
-40.3% |
13 |
21 |
-37.7% |
| Ethylamine |
18 |
40 |
-53.3% |
24 |
49 |
-51.4% |
| Isopropylamine |
23 |
65 |
-63.5% |
30 |
75 |
-60.2% |
| Propylamine |
29 |
90 |
-66.7% |
37 |
111 |
-66.0% |
| Diethylamine |
41 |
88 |
-52.8% |
49 |
105 |
-52.5% |
| Butylamine |
47 |
110 |
-56.9% |
57 |
125 |
-54.0% |
| Triethylamine |
45 |
81 |
-43.4% |
53 |
91 |
-41.2% |
| Dipropylamine |
50 |
93 |
-45.8% |
58 |
105 |
-44.1% |
| Diisopropylamine |
44 |
77 |
-42.4% |
51 |
87 |
-40.8% |
| Cyclohexylamine |
59 |
112 |
-47.2% |
69 |
128 |
-45.9% |
| Dibutylamine |
47 |
75 |
-36.8% |
54 |
84 |
-35.7% |
| Miscellaneous | ||||||
| Methyl iodide |
39 |
11 |
241.3% |
49 |
17 |
179.6% |
| Acrylonitrile |
72 |
48 |
50.1% |
90 |
61 |
48.7% |
| Dibromomethane |
73 |
82 |
-10.4% |
89 |
121 |
-26.1% |
| Pyridine |
71 |
119 |
-39.5% |
87 |
>134 |
-34.9% |
| Epichlorohydrin |
67 |
85 |
-20.9% |
84 |
110 |
-23.4% |
| 2-Methoxyethanol |
|
116 |
|
|
145 |
|
| 1,2-Dibromoethane |
76 |
>141 |
-45.8% |
91 |
165 |
-44.8% |
| 1-Nitropropane |
65 |
143 |
-54.3% |
80 |
164 |
-50.8% |
| 2-Ethoxyethanol |
67 |
77 |
-12.5% |
81 |
123 |
-33.4% |
| Acetic anhydride |
67 |
124 |
-45.2% |
83 |
138 |
-39.6% |
| 2-Methoxyethyl acetate |
60 |
93 |
-35.0% |
71 |
113 |
-36.5% |
| Bromobenzene |
73 |
142 |
-48.1% |
84 |
159 |
-46.6% |
| 2-Ethoxyethyl acetate |
56 |
79 |
-28.8% |
66 |
96 |
-31.6% |