Request that the FDA take the following administrative actions to preserve continuous United States availability of pentetate calcium trisodium (Ca-DTPA) and pentetate zinc trisodium (Zn-DTPA), FDA-approved medical countermeasures for internal contamination with plutonium, americium, or curium | Federal Regulations · Congress.wiki

Nonrulemaking

FDA

Open for Comments

FDA-2026-P-9677

Request that the FDA take the following administrative actions to preserve continuous United States availability of pentetate calcium trisodium (Ca-DTPA) and pentetate zinc trisodium (Zn-DTPA), FDA-approved medical countermeasures for internal contamination with plutonium, americium, or curium

Documents

Comments

Description

OPEN

Key Dates

Comment Period OpensAug 24, 2026

Documents

Type	Title	Posted	Comments	Status
Supporting Material	Exhibit 3 - 3. Semelka RC, Ramalho M. Coordination chemistry as the governing principle of gadolinium biology: from GBCA design to dissociation, endogenous coordination, and chelation. J Appl Biotechnol Bioeng. 2026;13(4):128-133. doi:10.15406/jabb.2026.13.00427. Exhibit 1.	Oct 5, 2026

Comment Statistics

Total Comments

Keywords

CDER

Citizen Petition

take the administrative actions set forth below

to preserve continuous United States

availability of pentetate calcium trisodium

(Ca-DTPA) and pentetate zinc trisodium (Zn-DTPA)

FDA-approved medical countermeasures for

internal contamination with

Data from Regulations.gov