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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
Chlorine7782-50-5AG7200/8200
7300/8300
7600/8600
0.5 ppm (t);
1 ppm (c)(s)-(o)(t)
10 ppmChemical goggles required when using a half mask, t-A43
Chlorine Dioxide10049-04-4AG7200/8200
7600/8600
0.1 ppm (t)(o);
0.3 ppm (s)-(t)
5 ppmChemical goggles required when using a half mask
Chloroacetophenone532-27-4FF-OV/N959001/2/3+
7100+8910
0.05 ppm (o)(t)2.3 ppmt-A4
Chlorobenzene108-90-7OV7100
8100
75 ppm (o);
10 ppm (t)
1,000 ppmSubstance for which ACGIH BEI exists; t-A3
Chlorodiphenyl (42% chlorine)53469-21-9FF-OV/N959001/2/3+
7100+8910
1 ppm (o)(t)
-skin-
5 mg/m3
Chlorodiphenyl (54% chlorine)11097-69-1FF-OV/N959001/2/3+
7100+8910
0.5 ppm (o)(t)5 mg/m3t-A3
Chloropicrin76-06-2FF-OV9001/2/3+
7100
0.1 ppm (o)(t)2 ppmt-A4
Chromium (II) Compounds - (as Cr)
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95

0.5mg/m3 (o)
250mg/m3For specific information, refer to:
NIOSH Pocket Guide to Chemical Hazards
Chromium (III) Compounds - (as Cr)

N
EZ22/EZ23N95
2200/2300N95
2600/2700N95


0.5mg/m3 (o)(t)
25mg/m3For specific information, refer to
NIOSH Pocket Guide to Chemical Hazards;
t-A4
Chromium (VI) Compounds - Dusts; Water Soluble (as Cr) Includes Chromic Acid and (see also Lead and Zinc Chromate)
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.05mg/m3 (t);
0.005mg/m3 (o);
as Cr(VI)
0.1mg CrO3/m3 (c)-(o)
15mg/m3t-A1; Also see specific compounds. Substance for which an ACGIH BEI exists. For specific information, refer to OSHA 29CFR1910.1026

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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