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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
Ethylene Glycol107-21-1OV/N7100+8910
8100+8910
100 mg/m3 (c)-(t)t-A4
Fibrous Glass Dust, Glass Fibers, Glass Wool, Rock Wool, Slag Wool, Continuous Filament Glass Fibers**N95EZ22/EZ23N95
2200/2300N95
2600/2700N95
1 f/cc (t)*;
Total 15 mg/m3 (o);
respirable fraction
5 mg/m3 (o);
**5mg/m3 (measured as inhalable fraction)
*(t)-A3
Respirable fiber longer than 5 u; diameter; aspect ratio >3:1 as det. by mem. Filt. meth 400-450 X mag (4mm obj.) phas. cont.illum.
**(t)-A4
Glycerin, Mist56-81-5RP2740R95/8970
7940, 7990
8940, 8990
Total dust 15 mg/m3 (o),
10 mg/m3 (t)
Respirable fraction
5 mg/m3 (o)
Grain Dust (Oat, Wheat, Barley)
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
4 mg/m3(t)*;
10 mg/m3 (o)
-SEN
*Inhalable dust
Graphite (Synthetic) all forms except fibers)7440-44-0
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 15 mg/m3 (o);
Respirable fraction
5 mg/m3 (o), 2.0 mg/m3 (t)*
*All forms except graphite fibers
Hexane (Isomers other than n-Hexane)OV7100
8100
500 ppm (t);
1,000 ppm (s)-(t)
Hydrogenated Terphenyls61788-32-7RP2740R95
7940/7990
8940/8970/8990
0.5 ppm (t)
Indene95-13-6OV7100
8100
5 ppm (t)
Indium, Dusts7440-74-6NEZ22/EZ23N95
2200/2300N95
2600/2700N95
0.1 mg/m3 (t)
{water soluble}
Iron Salts, Soluble (as Fe)
N
EZ22/EZ23N95
2200/2300N95
2400/2800N95
1 mg/m3 (t)

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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