Table 4 Group 2 solvents detected in laboratory air, as classified by research fields
From: Use of organic solvents in large research institutions in Japan
Group 2 solvents | Research fields | p by χ 2 test | |||||
|---|---|---|---|---|---|---|---|
AGR | BIOL | MED | SCI | T&E | Total | ||
No. of laboratories surveyed | 594 | 664 | 1017 | 1089 | 1153 | 4517 | |
Acetone (%)a | 123 (20.7) | 172 (25.9) | 185 (18.2) | 328 (30.1) | 555 (48.1) | 1363 (30.2) | <0.01 |
1-Butanol (%)a | 34 (6.3) | 30 (4.5) | 34 (3.3) | 16 (1.5) | 24 (2.1) | 138 (3.1) | <0.01 |
2-Butanol (%)a | 0 (0.0) | 1 (0.2) | 6 (0.6) | 7 (0.6) | 6 (0.5) | 20 (0.4) | na |
n-Butyl acetate (%)a | 0 (0.0) | 3 (0.5) | 0 (0.0) | 2 (0.2) | 2 (0.2) | 7 (0.2) | na |
Chlorobenzene (%)a | 0 (0.0) | 5 (0.8) | 0 (0.0) | 6 (0.6) | 10 (0.9) | 21 (0.5) | na |
Cresol (%)a | 1 (0.2) | 1 (0.2) | 2 (0.2) | 6 (0.6) | 0 (0.0) | 10 (0.2) | na |
Cyclohexanol (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 3 (0.3) | 3 (0.1) | na |
Cyclohexanone (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 2 (0.2) | 3 (0.3) | 5 (0.1) | na |
o-Dichlorobenzene (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 3 (0.3) | 3 (0.1) | na |
Dichloromethane (%)a | 33 (5.6) | 26 (3.9) | 17 (1.7) | 111 (10.2) | 187 (16.2) | 374 (8.3) | <0.01 |
N,N-Dimethylformamide (%)a | 34 (5.7) | 58 (8.7) | 57 (5.6) | 46 (4.2) | 64 (5.6) | 259 (5.7) | <0.01 |
1,4-Dioxane (%)a | 6 (1.0) | 3 (0.5) | 3 (0.3) | 2 (0.2) | 10 (0.9) | 24 (0.5) | na |
EG monoethyl ether (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (0.1) | 0 (0.0) | 1 (0.0) | na |
EG monomethyl ether (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 4 (0.4) | 0 (0.0) | 4 (0.1) | na |
Ethyl acetate (%)a | 85 (14.3) | 46 (6.9) | 31 (3.0) | 99 (9.1) | 245 (21.2) | 506 (11.2) | <0.01 |
Ethyl ether (%)a | 80 (13.5) | 83 (12.5) | 156 (15.3) | 69 (6.3) | 140 (12.1) | 528 (11.7) | <0.01 |
Hexane (%)a | 68 (11.4) | 65 (9.8) | 50 (4.9) | 112 (10.3) | 314 (27.2) | 609 (13.5) | <0.01 |
Isobutyl alcohol (%)a | 4 (0.7) | 5 (0.8) | 1 (0.1) | 4 (0.4) | 3 (0.3) | 17 (0.4) | na |
Isopentyl acetate (%)a | 4 (0.7) | 2 (0.3) | 0 (0.0) | 0 (0.0) | 0 (0.0) | 6 (0.1) | na |
Isopentyl alcohol (%)a | 26 (4.4) | 3 (0.5) | 14 (1.4) | 15 (1.4) | 1 (0.1) | 59 (1.3) | na |
Isopropyl alcohol (%)a | 139 (23.4) | 155 (23.3) | 249 (24.5) | 136 (12.5) | 155 (13.4) | 834 (18.5) | <0.01 |
Methyl acetate (%)a | 2 (0.3) | 8 (1.2) | 2 (0.2) | 3 (0.3) | 3 (0.3) | 18 (0.4) | na |
Methyl alcohol (%)a | 215 (36.2) | 258 (38.9) | 348 (34.2) | 272 (25.0) | 403 (35.0) | 1496 (33.1) | <0.01 |
Methyl ethyl ketone (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 8 (0.7) | 8 (0.7) | 16 (0.4) | na |
Methyl isobutyl ketone (%)a | 0 (0.0) | 0 (0.0) | 0 (0.0) | 1 (0.1) | 4 (0.3) | 5 (0.1) | na |
Styrene (%)a | 0 (0.0) | 3 (0.5) | 0 (0.0) | 1 (0.1) | 10 (0.9) | 14 (0.3) | na |
Tetrahydrofuran (%)a | 27 (4.5) | 22 (3.3) | 7 (0.7) | 18 (1.7) | 146 (12.7) | 220 (4.9) | <0.01 |
Toluene (%)a | 44 (7.4) | 36 (5.4) | 32 (3.1) | 56 (5.1) | 236 (20.5) | 404 (8.9) | <0.01 |
Xylenes (%)a | 40 (6.7) | 51 (7.7) | 235 (23.1) | 54 (5.0) | 79 (6.9) | 459 (10.2) | <0.01 |