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Chemical Respiratory Guide


Chemical Agent
CAS Number
Chemical Respiratory Chart

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Chemical NameCAS NumberFilter TypeSuggested ProductTLV(t) PEL(o)IDLHComments
Mercury, Aryl Compounds (as Hg)
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (t);
0.1 mg/m3 (c)-(o); -skin-
For dust with no vapor pressure; Substance for which ACGIH BEI exists
Cobalt, Metal Dusts and Fumes (as Co)7440-48-4NRP1002730N100
2360P100
7940/7990
8940/8990
0.1 mg/m3(o);

0.02 mg/m3 (t)
20 mg/m3t-A3; substances for which an ACGIH BEI exists
Copper, Fume (as Cu)7440-50-8N2310/2315N99
2400/2800N95
0.1 mg/m3(o);
0.2 mg/m3 (t)
100 mg/m3
Rhodium, Metal* and Insoluble Compounds, Dusts and Mists (as Rh)*7440-16-6
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3(o);
1 mg/m3 (t)
{water-based}
100 mg/m3
(as Rh)
t-A4
2,4,6-Trinitrotoluene118-96-7OV/N7100+8910
8100+8910
0.1 mg/m3(t);
1.5 mg/m3 (o)
-skin-
500 mg/m3Substance for which an ACGIH BEI (Methemoglobin inducer) exists
Bromine7726-95-6FF-OV/AG9001/2/3+
7300/7600
0.1 ppm (o)(t)
0.2 ppm (s)-(t)
3 ppm
Perchloromethyl Mercaptan594-42-3OV7100
8100
0.1 ppm (o)(t)10 ppm
Quinone106-51-4FF-OV/N959001/2/3+
7100+8910
0.1 ppm (o)(t)22 ppm
Chloropicrin76-06-2FF-OV9001/2/3+
7100
0.1 ppm (o)(t)2 ppmt-A4
Phenyl Mercaptan108-98-5OV7100
8100
0.1 ppm (t)
Skin

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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