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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
Sulfur Monochloride10025-67-9FF-AG9001/2/3+
7200/7300/
7600
1 ppm(c)-(t)
1 ppm (o)
5 ppm
Hydrogen Fluoride (as F)7664-39-3FF-AG9001/2/3+
7200/7300/
7600
0.5 ppm (t)*
2 ppm (c)-(t)*
3 ppm (o)*+
*as F, +15 min
-skin-
30 ppmSubstance for which ACGIH BEI exists
Trimethylamine75-50-3FF-AM9001/2/3+
7400/7600
5ppm (t)N.D.
Phosphoric Acid7664-38-2FF-N959001/2/3+
7940/7990
1 mg/m3 (o)(t)
3 mg/m3 (s)-(t)
1000 mg/m3
Platinum Soluble Salts7440-06-4FF-N959001/2/3+
7940/7990
.002 mg/m3 (o)(t)4 mg/m3 (as PT)
Acetaldehyde75-07-0FF-OV
FF-Form
9001/2/3+
7100/7500
200 ppm (o)
25 ppm (c)-(t)
2000 ppmt-A3
Short service life for OV
Acetic Acid64-19-7FF-OV9001/2/3+
7100
10 ppm (o)(t)50 ppm
2-Pentanone107-87-9FF-OV9001/2/3+
7100
200 ppm (o)
150 ppm (s)-(t)
1500 ppm
Acetic Anhydride108-24-7FF-OV9001/2/3+
7100
5 ppm (o)
1 ppm (t)
200 ppmt-A4
Propionic Acid79-09-4FF-OV9001/2/3+
7100
10 ppm (t)N.D.

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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