Safety & Loss Prevention

Z-Table

University of Wisconsin System Administration
29 CFR Ch. XVII (7-1-92 Edition)
Table Z-1-A -- Limits for Air Contaminants
    TRANSITIONAL LIMITS FINAL RULE LIMITS**
                 
PEL* TWA STEL (c) CEILING
SUBSTANCE CAS NO (f) ppm(a) mg/m3(b) SKIN ppm(a) mg/m3(b) ppm(a) mg/m3(b) ppm(a) mg/m3(b) SKIN
Hafnium 7440-58-6 0.5 0.5
Heptachlor 76-44-8 0.5 X 0.5 X
Heptane (n-Heptane) 142-82-5 500 2000 400 1600 500 2000
Hexachlorobutadiene 87-68-3 0.02 0.24
Hexachlorocyclo-pentadiene 77-47-4 0.01 0.1
Hexachloroethane 67-72-1 1 10 X 1 10 X
Hexachloronaphthalene 1335-87-1 0.2 X 0.2 X
Hexafluoracetone 684-16-2 0.1 0.7 X
n-Hexane 110-54-3 500 1800 50 180
Hexane isomers Varies With Compound 500 1800 1000 3600
2-Hexanone (Methyl n-butyl ketone) 591-78-6 100 410 5 20
Hexone (Methyl isobutyl ketone) 108-10-1 100 410 50 205 75 300 1/8
sec-Hexyl acetate 108-84-9 50 300 50 300
Hexylene glycol 107-41-5 25 125
Hydrazine 302-01-2 1 1.3 X 0.1 0.1 X
Hydrogenated terphenyls 61788-32-7 0.5 5
Hydrogen bromide 10035-10-6 3 10 3 10
Hydrogen chloride 7647-01-0 (C)5 (C)7 5 7
Hydrogen cyanide 74-90-8 10 11 X 4.7 5 X
Hydrogen fluoride (as F) 7664-39-3 Tbl. Z2 3 6
Hydrogen peroxide 7722-84-1 1 1.4 1 1.4
Hydrogen selenide (as Se) 7783-07-5 0.05 0.2 0.05 0.2
Hydrogen sulfide 7783-06-4 Tbl. Z2 10 14 15 21
Hydroquinone 123-31-9 2 2
2-Hydroxypropyl acrylate 999-61-1 0.5 3 X
A

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