United States Nuclear Regulatory Commission - Protecting People and the Environment

U.S. Nuclear Regulatory Commission

Question 425: It appears that some of the oral ingestion

ALIs in Appendix B of 10 CFR 20 are sometimes associated

with the wrong chemical forms; is this the case?

Answer: No. See the answer to Question 71 in section 10

CFR Part 20, Appendix B which indicates that the "Class"

column of 10 CFR Appendix B applies to inhalation only; it

does not refer to ingestion. In other words, neither the

D, W, and Y classes nor the chemical forms (compounds) in

the "Class" column refer to the ingestion ALIs.

(Reference: 10 CFR 20 Appendix B).

Page Last Reviewed/Updated Thursday, March 29, 2012