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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
Sodium Aluminum Flouride15096-52-3NEZ22/EZ23N95
2200/2300N95
2600/2700N95
2.5 mg/m3 (o)(t)250 mg/m3 (as F)t-A4
Sodium Bisulfite7631-90-5AG/N7200+8910
8100+8910
5 mg/m3 (t)t-A4
Sodium Flouride7681-49-4NEZ22/EZ23N95
2200/2300N95
2600/2700N95
2.5 mg/m3 (o)(t)250 mg/m3 (as F)t-A4
Sodium Fluoroacetate62-74-8NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.05 mg/m3 (o)(t);
-skin-
2.5 mg/m3
Sodium Hydroxide1310-73-2NEZ22/EZ23N95
2200/2300N95
2600/2700N95
2 mg/m3(o);
2 mg/m3 (c)-(t)
10 mg/m3
Sodium Metabisulfite7681-57-4AG/N7200+89105 mg/m3 (t)t-A4
Starch9005-25-8
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10 mg/m3(t),
15 mg/m3 (o);
Respirable fraction
5 mg/m3 (o)
t-A4
Stoddard Solvent8052-41-3OV7100
8100
100 ppm (t)
500 ppm (o)
20,000 mg/m3
Strychnine57-24-9NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.15 mg/m3 (o)(t)3 mg/m3
Styrene, Monomer100-42-5OV7100
8100
20 ppm (t)*;
100 ppm -(o); -
40 ppm (s)-(t)
200 ppm (c)-(o)
[600 ppm (c)-(o);
5 min peak / any 3 hrs]
700 ppm*Substance for which an ACGIH BEI exists; A-4

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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