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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
Asbestos, all forms1332-21-4, 12172-73-5, 12001-2NRP1008940/8990
7940/7990
0.1 f/cc (o) (t)*;
1.0 f/cc (s)-(o) 30 minutes
*Fiber longer than 5 um; aspect ratio > 3:1 set by 400-450 X mag. (4 mm objective) pcm. See 29CFR1910.1001 & 1926.58; A-1; O-Ca
Borates, compounds, Inorganic12179-04-3, 1303-96-4, 1330-43NEZ22/EZ22N95
2200/2300N95
2600/2700N95
2.0mg/m3 (t) inhalable
6.0mg/m3 (s)-(t) inhalable
Boron Oxide1303-86-2NEZ22/EZ22N95
2200/2300N95
2600/2700N95
Total Dust
10mg/m3 (t),15mg/m3 (o)
2,000mg/m3
Iron Salts, Soluble (as Fe)
N
EZ22/EZ23N95
2200/2300N95
2400/2800N95
1 mg/m3 (t)
4, 41-Thiobis (6 Tert-Butyl-m-Cresol)96-69-5NEZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10 mg/m3 (t),
15 mg/m3 (o);
Respirable fraction 5mg/m3
t-A4
Pentaerythritol115-77-5
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10 mg/m3 (t),
15mg/m3 (o);
Respirable fraction
5 mg/m3 (o)
Perlite93763-70-3
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total Dust
15 mg/m3 (o); Respirable
fraction 5 mg/m3 (o)
t-A4
Acetylsalicylic Acid50-78-2NEZ22/EZ23N95
2200/2300N95
2600/2700N95
5mg/m3 (t)
a-Alumina1344-28-1
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dust 10mg/m3 (t),
15 mg/m3 (o);
Respirable fraction 5mg/m3 (o)
Dust containing no asbestos and <1% Crystalline Silica
t-A4
Aluminum, Metal Dust7429-90-5
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total dusts 15mg/m3 (o); Respirable dusts 5mg/m3 (o) 1mg/m3 (t) respirable fractionT-A4

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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