IRIS

Ammonia

CASRN 7664-41-7

Noncancer Assessment

Reference Dose for Oral Exposure (RfD) (PDF) (10 pp, 309 K)
Not assessed under the IRIS Program.

 


Reference Concentration for Inhalation Exposure (RfC) (PDF) (10 pp, 309 K) Last Updated: 09/20/2016

System RfC (mg/m3) Basis PoD Composite UF Confidence
Respiratory 5 x 10-1 Decreased lung function and respiratory symptoms NOAEL (ADJ): 4.9
mg/m3
10 Medium

 

Cancer Assessment

Weight of Evidence for Cancer (PDF) (10 pp, 309 K)
Not assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Oral Exposure (PDF) (10 pp, 309 K)

Not assessed under the IRIS Program.

Quantitative Estimate of Carcinogenic Risk from Inhalation Exposure (PDF) (10 pp, 309 K)

Not assessed under the IRIS Program.


Note: The ammonia (re)assessment was suspended in Dec 2018, but may be restarted as Agency priorities change.

Assessment Manager(s): James Avery (avery.james@epa.gov)

Step Assessment Materials Released to the Public Release Date Public Meeting Date
1 Problem Formulation Materials 04/2018 05/2018
  Suspended 12/2018  

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