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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
Platinum Soluble Salts7440-06-4FF-N959001/2/3+
7940/7990
.002 mg/m3 (o)(t)4 mg/m3 (as PT)
Acrylamide79-06-1OV/P1007100+7940
8100+8940
.03mg/m3 (t)*;
.3mg/m3 (o)
-skin-
60mg/m3t-A3; -*Measured as inhalable fraction and vapor
Wood Dust, Western Red Cedar
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
.5 mg/m3*
-SEN-
Inhalable fraction,
t-A4
Rhodium, Soluble Compounds (as Rh)NRP1002730N100
2360P100
7940/7990
8940/8990
0.001 mg/m3(o);
0.01 mg/m3 (t)
2 mg/m3 (as Rh)t-A4
Beryllium & Compounds (as Be)7440-41-7NRP1002730N100
2360P100
8940/8990
7940/7990
0.002mg/m3 (o)(t)
0.005mg/m3 (c)-(o);
0.01 mg/m3 (c)-(t) [0.025mg/m3 for
30 min. peak/8 hr. shift (c)-(o)]
4mg/m3t-A1; ACGIH NIC to 0.0005 mg/m3 (inhalable fraction), 0.0002 STEL/CEIL (inhalable fraction) SEN, Skin.
Tert-Butyl Chromate (as CrO3)1189-85-1NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.005 mg/m3 (c)-(o)(t);
-skin-
15mg/m3 as Cr(VI)
Zinc Chromate as crNEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.01 mg/m3
0.1 mg/m3 (c)-(t) as CrO3
t-A1
Silver, Soluble Compounds (as Ag)NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.01 mg/m3 (o)(t)
{water based}
10 mg/m3 (as Ag)
Silver, Metal; Dust7440-22-4NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.01 mg/m3(o);
0.1 mg/m3 (t)
10 mg/m3 (as Ag)
4,4-Methylenedianilene101-77-9NRP1002730N100
2360P100
7940/7990
8940/7990
0.01 ppm (o);
0.1 ppm (t);
0.1 ppm (s)-(o); -skin-
Need OV/NRP100 if heat is involved. See 29 CFR 1910.1050; O-Ca; t-A3

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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