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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
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
Tin, Organic Compounds (as Sn)OV/N7100+8910
8100+8910
0.1 mg/m3 (o)(t);
0.2 mg/m3 (s)-(t); -skin-
25 mg/m3t-A4
Octachloronapthalene2234-13-1OV/N7100+8910
8100+8910
0.1 mg/m3 (o)(t);
0.3 mg/m3(s)-(t);
-skin-
1mg/m3*Add 8910 if particulate is present.
*NIOSH set “Effective” IDLH at 10x the Recommended Exposure Limit (REL)
Triorthocresyl Phosphate78-30-8R/P2740R95
7940/7990
8970/8940
8990
0.1 mg/m3 (o)(t); -skin-
40 mg/m3t-A4, substance for whichas ACGIH BEI exists (Acetylcholinesterase Inhibiting Pesticide)
Picric Acid88-89-1NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (o)(t); -skin-75 mg/m
Endrin72-20-8OV/NRP1007100+7940
8100+8940
0.1 mg/m3 (o)(t); -skin-2 mg/m3t-A4
Thallium*, Elemental and Soluble Compounds (as Ti)*7440-28-0NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (o);
0.02 mg/m3 (t)*
-skin-
15 mg/m3 (as Ti)Measured as inhalable fraction and vapors
Parathion56-38-2OV/P1007100+7940
8100+8940
0.1 mg/m3 (o); -skin-
-05 mg/m3 (t)*
-skin-
10 mg/m3Substance for which an ACGIH BEI exists; t-A4; *Measured as inhalable fraction and vapor
Indium, Dusts7440-74-6NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (t)
{water soluble}
Nickel, Soluble Compounds (as Ni)N
{water soluble}
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (t)*
1 mg/m3 (o)
10 mg/m3 (as Ni)*Inhalable fraction,
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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