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Chemical Respiratory Guide


Chemical Agent
CAS Number
Chemical Respiratory Chart

Download a printable version

Chemical NameCAS NumberFilter TypeSuggested ProductTLV(t) PEL(o)IDLHComments
Coke Oven EmissionsRP2740R95/8970
7940/7990
8940/8990
0.15 mg/m3 (o)
(Benzene soluble fraction)
See 29CFR1910.1029;
O-Ca
Vegetable Oil, Mists (Except Caster, Cashew Nut or Similar Irritant Oils)RP2740R95/8970
7940/7990
8940/8990
Total particulates
15 mg/m3 (o);
Respirable fraction
5 mg/m3 (o)
Diethyl Phthalate84-66-2RP2740R95/8970
7940/7990
8940/8990
5 mg/m3 (t)t-A4
Oil Mist (Mineral);RP2740R95/8970
7940/7990
8940/8990
5 mg/m3 (o)(t)*;
10 mg/m3 (s)(t)
2,500 mg/m3*Measured as inhalable fraction and vapor
Formaldehyde50-00-0FORM7500/7600
8500/8600
0.75 ppm (o);
0.3 ppm (c)-(t);
2 ppm (s)-(o)
20 ppmSee 29CFR1910.1048; O-Ca; t-A2; Dispose of cartridges at the end of each work shift; wear gas-proof goggles with half-mask. Do not use same cartridge for any other gases or vapors; SEN
Benzene71-43-2OV8100
7100
1 ppm (o);
5 ppm (s)-(o);
0.5 ppm (t);
2.5 (s)-(t)
-skin-
500 ppmt-A1. Change cartridge every shift.
See table Z-2 and 29CFR1910.1028;
O-Ca; 1/2 mask allowed with constant monitoring. Substance for which an ACGIH BEI exists.
Benzoyl Peroxide94-36-0OV/N8100+8910
7100+8910
5mg/m3 (o)(t)1,500mg/m3t-A4
Biphenyl92-52-4OV/N8100+8910
7100+8910
0.2 ppm (o)(t)100mg/m3
Asphalt (petroleum; Bitumen) Fume8052-42-4OVRP8100+8970/8940
7100+8970/7940
0.5mg/m3 (t)*
Soluble aerosol as benzene (or equivalent method) inhalable particulate
2740R95/2840R95 may be suitable for some app’s. t-A4
Azinphos-methyl86-50-0OVRP8100+8970/8940
7100+8970/7940
0.2mg/m3 (o)(t); -*skin-
-SEN-
10mg/m3Substance for which an ACGIH BEI exists, t-A4; *measured as inhalable fraction and vapor

EXPLANATION OF GUIDE FORMAT


  • OSHA PermissibleExposure Limits (PEL)
  • American Conference of GovernmentalIndustrial Hygienists (ACGIH)
  • Threshold Limit Values (TLV)
  • ChemicalAbstracts Service (CAS)
  • IDLH (Immediately Dangerous to Life and Health)<
  • LEL (Lower Explosion

Filter Type

  • "N" means Dusts and Non-Oil Based Mists
  • "R" means Dusts, and Oil and Non-Oil Based Mists with time restrictions
  • "P" means Dusts and Oil and Non-Oil Based Mists, extended life for Dusts and Non-Oil Based Mists
  • "AM" means Ammonia/Methylamine
  • "AG" means Acid Gas
  • "FORM" means Formaldehyde
  • "OV" means Organic Vapor
  • "OV/AG" means Organic Vapor/Acid Gas
  • "MULTI" means Multi Gas/Vapor
  • "95" means 95% efficient
  • "99" means 99% efficient
  • "100" means 99.97% efficient
  • "/" means OR. For example, 8970/8940 means you may use either filter.
  • "FF" means full face respirator; 9000 is sugg

TLV(t) PEL(o)

  • An "o" next to exposure limit indicates it is an OSHA PEL.
  • A "t" indicates it is an ACGIH TLV.
  • A"c"indicates that it is a ceiling valuewhich refers to the concentrationthat should not be exceeded at anytime during work exposure.
  • An"s" appears next to a limit this indicates that it is a short termexposure limit (STEL
  • A "skin" designation indicates that the substance can be absorbed throughthe skin, eyes or mucous membranes and appropriate measures must betaken to avoid absorption.
  • A "SEN" indicates TLV-confirmed potential for worker sensitization as a resultof dermal contact and/or inhalation exposure based on the weightof scientific evidence.
Comments list any additional points that should be noted.
ACGIH designates carcinogens as follows:
  • TLV-A1 (t-A1): Confirmed Human Carcinogen
  • TLV-A2 (t-A2): Suspected Human Carcinogen
  • TLV-A3 (t-A3): Confirmed Animal Carcinogen with Unknown Relevance to Humans
  • TLV-A4 (t-A4): Not Classifiable as a Human Carcinogen
  • TLV-A5 (t-A5): Not Suspected as a Human Carcinogen
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