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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
Particulates Not Otherwise Classified (PNOC)NRPSee note**Total dust 15 mg/m3 (o)
or 50mppcf(o);
Respirable fraction;
5 mg/m3 (o
or 15mppcf(o);
**Caution is advised category includes many materials, R or P filter is suggested if oils are present
Tributyl Phosphate126-73-8OV/RP7100+8970/7940
8100+8970/8940
2.2 mg/m3 (t)
5 mg/m3 (o)
30 ppmSubstance for which an ACGIH (Acetylcholi-Nesterase Inhibiting Pesticide) BEI exists
Dibutyl Phthalate84-74-2OV/RP7100+8970/7940
8100+8970/8940
5 mg/m3 (o)(t)4,000 mg/m3
Dibutyl phosphate107-66-4OV/RP7100+8970/7940
8100+8970/8940
1 ppm (o)(t);
2 ppm (s)(t)
30 ppm
Dimethyl Phthalate131-11-3OV/RP7100+8970/7940
8100+8970/8940
5 mg/mc (o)(t)2,000 mg/m3
Nicotine54-11-5OV/RP7100+8970/7940
8100+8970/8940
0.5 mg/m3 (o)(t); -skin-5 mg/m3
o-sec-Butyl-Phenol89-72-5OVRP7100+8970+7940
8100+8970+8940
5 ppm (t); -skin-
Paraquat Dichloride1910-42-5OV/NRP7100+8910/
8970/7940
8100+8910/
8970/8940
1 mg/m3 (t)
Phenol108-95-2OV/N7100+8910
8100+8910
5 ppm (o)(t);
-skin-
250 ppmSubstance for which an ACGIH BEI exists; t-A4
p-Phenylene Diamine106-50-3OV/N7100+8910
8100+8910
0.1 mg/m3 (o)(t);
-skin-
25 mg/m3Use supplied air if heat is involved; t-A4

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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