ALC OH OLS IV: MET HO D 140 3, Issue 3, dated 15 M arch 200 3 - Page 5 o f 5
TABLE 1.
Exposure Limits and Physical Properties
Compound
OSHA (p pm )
NIOSH (ppm )
ACG IH (ppm )
mg/m 3 = 1ppm @ NTP
MW
BP (°C)
Den sity @ 20°C (g/mL)
VP @ 20°C , KPa (mm Hg)
2-m eth oxyeth anol
25 (skin)
0.1 (skin)
5 (skin)
3.16
76.09
124
0.966
0.8 (6)
2-ethoxyethanol
200 (skin)
0.5 (skin)
5 (skin)
3.75
90.12
135
0.931
0.5 (4)
2-butox yeth anol
50 (skin)
5 (skin)
25 (skin)
4.91
118.17
171
0.902
0.11 (0.8)
TABLE 2. Method Evaluation Analytical Methodb
Overall Methoda Compound
Range
Accuracy
Breakthrough
Bias
@ 3
(m g/m )
2-methoxyethanol 2-ethoxyethanol 2-butoxyethanol
a) b) c) d) e)
Precision Sr T
2 x OSHA PEL
Range studied
LOD
( : g/sample)
( : g/sample)
Ave. DE
Storage Stability Measurement Precision Sr
Levels
Recovery
( : g/sample)
(% )
44-160
0.41
128 Lc
NSe
0.072
2-387
0.8
97.8
0.024
120.5
103.7
340-1460
0.11
> 10 Ld
NS
0.056
2-373
0.7
100.2
0.022
118.0
101.7
0.14
c
NS
0.071
3-361
1.3
99.9
0.024
90.0
82
124-490
> 44 L
Generated air sample data in References 7 and 8. Data for analytical method in Reference 10. Tes ting done in dry air. Te stin g done in 90% rela tive hum idity. NS = not significant
NIOSH Manual of Analytical Methods, Fourth Edition
