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HYD RO CAR BO NS, BP 36-216 °C : MET HO D 150 0, Issue 3, dated 15 M arch 200 3 -Page 6 of 8
TABLE 2. EXPOSU RE LIMITS, PPM [5-7] OSHA Substance
TW A
PEAK
NIOSH TW A
C
AC GIH TLV
STEL
m g/m 3 per ppm
cyclohexane
300
300
300
3.44
cyclohexene
300
300
300
3.36
n-decane
none
none
none
5.82
n-dodecane
none
none
none
6.97
500
85
500
50
50
3.52
500
400
400
4.01
n-nonane
none
200
200
5.25
n-octane
500
75
385
300
375
4.67
n-pentane
1000
120
610
600
750
2.95
n-undecane
none
none
n-heptane n-hexane
a
methylcyclohexane
a
440
400
500
none
The ACG IH recomm endation for other hexane isomers is: TLV 500, STEL 1000.
NIOSH Manual of Analytical Methods (NMAM), Fourth Edition
4.10
6.39
