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Phenol

Acute REL (μg/m3)
5800
Species
Human
Acute REL Toxicologic Endpoint
Respiratory and eye irritation
Acute REL Target Organs
Respiratory system, eyes
Chronic Inhalation REL (μg/m3)
200
Chronic Target Organs
Alimentary system (liver), cardiovascular system, kidney, nervous system
Human Data
No
Last Chronic REL Revision
2000
Chronic Reference Exposure Levels Comments

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3

 

Acute Reference Exposure Levels Comments

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D2.

Severity
Mild
Last Acute REL Revision
1999

Xylenes (technical mixture of m, o, p-isomers)

Acute REL (μg/m3)
22000
Species
Human
Acute REL Toxicologic Endpoint
Central nervous system impairment, respiratory and eye irritation
Acute REL Target Organs
Nervous system, respiratory system, eyes
Chronic Inhalation REL (μg/m3)
700
Chronic Target Organs
Nervous system, respiratory system, eyes
Human Data
Yes
Last Chronic REL Revision
2000
Chronic Reference Exposure Levels Comments

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D3

 

Acute Reference Exposure Levels Comments

OEHHA 2008. Technical Supporting Document for Noncancer RELs, Appendix D2.

Severity
Mild
Last Acute REL Revision
1999

Nickel Oxide

Acute REL (μg/m3)
0.2
Species
Mouse
Acute REL Toxicologic Endpoint
Depressed antibody response
Acute REL Target Organs
Immune system
8-Hour Inhalation REL (μg/m3)
0.06
Last 8-Hour REL Revision
2012
Chronic Inhalation REL (μg/m3)
0.02 (inhalation); 11 μg/kg BW-day (oral)
Chronic Target Organs
Inhalation: Respiratory system. Oral: Development
Human Data
No
Last Chronic REL Revision
2012
Chronic Reference Exposure Levels Comments

Inhalation concentrations as micrograms Ni/m3; oral dose as micrograms Ni/kg-day. OEHHA 2012. Nickel Reference Exposure Levels. Nickel oxide listed separately for chronic RELs.

8-Hour Reference Exposure Levels Comments

Inhalation concentrations as micrograms Ni/m3. OEHHA 2013. Technical Support Document for Noncancer RELs, Appendix D1. Updated July 2014. Listed as Nickel (and compounds).

Acute Reference Exposure Levels Comments

Inhalation concentrations as micrograms Ni/m3. OEHHA 2012. Nickel Reference Exposure Levels. Listed as Nickel (and compounds).

Last Acute REL Revision
2012

Proposed Reference Exposure Levels for Toluene Diisocyanate and Methylene Diphenyl Diisocyanate – SRP Drafts

Air
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