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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
Plaster of Paris26499-65-0
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10 mg/m3 (t)*
15 mg/m3 (o); Respirable
fraction 5 mg/m3 (o)
Total dust containing no Asbestos and <1% Crystalline Silica measured as inhalable fraction of aerosol
Platinum Metal, Dusts and Mist7440-06-4
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
1 mg/m3 (t)
{water-based}
Antimony* & Compounds (as Sb), Dusts & Mists*7440-36-0
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.5mg/m3 (o)(t)
{water based mists}
50mg/m3 (as Sb)
Portland Cement65997-15-1
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust
1 mg/m3 (t) 15mg/m3 (o)
or 50mppcf (o);
Respirable fraction
5 mg/m3 (o)
5,000 mg/m3Particulate matter containing no Asbestos and <1% t-A4
Potassium Hydroxide1310-58-3
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
2 mg/m3 (c)-(t)
Barium Sulfate7725-43-7
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10mg/m3 (t),
15mg/m3 (o);
Respirable fraction 5mg/m3 (o)
Total dust containing no Asbestos and <1% Crystalline Silica
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
Rhodium, Metal Fume (as Rh)7440-16-6
N

2310/2315N99
2400/2800N95
0.1 mg/m3 (o)
1 mg/m3 (t)
100 mg/m3
(as Rh)
Rouge1309-37-1
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust
15 mg/m3 (o);
Respirable fraction
5 mg/m3 (o)
Silica-Amorphous, Diatomaceous Earth (Uncalcined)61790-53-2
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
20 mppcf (o) or
80 mg/m3 (o)
----------------
%SiO2
3000 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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