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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
Ammonium Chloride12125-02-9solids
N

Liquids
AM/N
EZ22/EZ23N95
2200/2300N95
26002700N95
{water based}
8400+8910
10mg/m3 (t);
20mg/m3 (s)-(t)
Ammonium Sulfamate7773-06-0
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
Total Dust
10mg/m3 (t), 15mg/m3 (o);
Respirable fraction
5mg/m3 (o)
1,500mg/m
Aniline62-53-3OV7100
8100
5 ppm (o)
2 ppm (t)
-skin-
100 ppmt-A3
Anisidine (o-,p-Isomers)o 90-04-0 p 104-94-9OV/RP
OV/N
7100+7940*
7100+8970*
7100+8990?
8100+8970/8940*
8100+8910?
0.5mg/m3 (o)(t);
-skin-
50mg/m3t-A3 for o Isomer
t-A4 for p Isomer
Antimony* & Compounds (as Sb), Dusts & Mists*7440-36-0
N
EZ22/EZ23N95
2200/2300N95
2600/2700N95
0.5mg/m3 (o)(t)
{water based mists}
50mg/m3 (as Sb)
ANTU86-88-4OV/NRP1007100+7940
8100+8940
0.3mg/m3 (o)(t)100mg/m3t-A4
Arsenic, Elemental & Inorganic Compounds (except Arsine) (as As)*7440-38-2NRP1002730N100
2360P100
8940/8990
7940/7990
0.01mg/m3 (o)(t)5mg/m3*See 29CFR1910.1018; O-Ca; t-A1; substance for which an ACGIH BEI exists
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
Asphalt (petroleum; Bitumen) Fume8052-42-4OVRP8100+8970/8940
7100+8970/7940
0.5mg/m3 (t)*
Soluble aerosol as benzene (or equivalent method) inhalable particulate
2740R95/2840R95 may be suitable for some app’s. t-A4
Azinphos-methyl86-50-0OVRP8100+8970/8940
7100+8970/7940
0.2mg/m3 (o)(t); -*skin-
-SEN-
10mg/m3Substance for which an ACGIH BEI exists, t-A4; *measured as inhalable fraction and vapor

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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