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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
Warfarin81-81-2NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (o)(t)100 mg/m3
1,2 Dichloroethylene540-59-0, 156-59-2, 156-60-3OV7100
8100
200 ppm (o)(t)1,000 ppm
Welding Fumes (Not Otherwise Classified)
N

2200/2315N99
2400/2800N95
Dicyclopentadiene77-73-6OV/N7100+8910
8100+8910
5 ppm (t)
Dicyclopentadienyl Iron102-54-5NEZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10mg/m3 (t),15 mg/m3 (o);
Respirable fraction 5 mg/m3 (o)
m-Xylene a,a-Diamine1477-55-0OV/N7100+8910
8100+8910
0.1 mg/m3 (c)(t); -skin-
2 Diethylaminoethanol100-37-8OV7100
8100
10 ppm (o);
2 ppm (t); -skin-
100 ppm
Yttrium*, Metal & cpds; Dusts & Metals (as Y)*7440-65-5NEZ22/EZ23N95
2200/2300N95
2600/2700N95
1 mg/m3 (o)(t)500 mg/m3
Zinc Chloride, Fume7646-85-7N2310/2315N99
2400/2800N95
1 mg/m3 (o)(t);
2 mg/m3 (s)-(t)
50 mg/m3
Zinc Oxide, Dust1314-13-2NEZ22/EZ23N95
2200/2300N95
2600/2700N95
Total particulates
15 mg/m3 (o);
Respirable fraction
5 mg/m3 (o)
10 mg/m3 (s)-(t)
2 mg/m3 (t)
500 mg/m3

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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