---
schema_version: "secwatch.filing_event.v1"
accession: "0001437749-26-008319"
form_type: "8-K"
ticker: "INIS"
cik: "0001038277"
company_name: "RADNOSTIX INC"
filed_at: "2026-03-16T23:59:59+00:00"
generated_at: "2026-05-15T11:20:02.162650+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.7
calibrated_materiality_score: 0.7
confidence: "high"
source: SEC EDGAR
---

# Radnostix terminates $12.45M DUF6 plant sale to AFR; voluntary capsule recall

## Summary
- APA terminated mutually on March 11, 2026; AFR could not pay $12.45M balance by March 31, 2026.
- AFR had paid $170K in non-refundable fees; no closing proceeds received by Radnostix.
- Company sees asset appreciation, low buyer funding confidence; will evaluate DUF6 plant options.
- Voluntary recall of Dibasic Sodium Phosphate Capsules (lots 2022-2025) for final capsule weight out of spec.
- Estimated costs: $125K write-offs and refunds; further $75K inventory + $25K-$75K/week lost revenue thru Q2.

## SEC filing metadata
- accession: 0001437749-26-008319
- form_type: 8-K
- ticker: INIS
- cik: 0001038277
- company_name: RADNOSTIX INC
- filed_at: 2026-03-16T23:59:59+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.7
- calibrated_materiality_score: 0.7
- confidence: high
- sec_items: 1.02, 8.01, 9.01
- EDGAR index: https://www.sec.gov/Archives/edgar/data/1038277/000143774926008319/0001437749-26-008319-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/1038277/000143774926008319/inis20260313_8k.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0001437749-26-008319
- JSON: https://secwatch.observer/filing/0001437749-26-008319.json
- Plain text: https://secwatch.observer/filing/0001437749-26-008319.txt

## Key facts
- Material Agreements
  RADNOSTIX INC terminated Asset Purchase Agreement with American Fuel Resources, LLC (effective 2026-03-11).
  - Action: termination
  - Agreement: asset purchase
  - Counterparty: American Fuel Resources, LLC
  - Effective: 2026-03-11
  source text: On March 16, 2026, Radnostix, Inc. (formerly International Isotopes, Inc., “RNX” or the “Company”), announced a mutual termination on March 11, 2026 of an Asset Purchase Agreement (the “APA”) dated February 8, 2024 that was entered into between RNX and its wholly-owned subsidiary International Isotopes Fluorine Products, Inc. (together with RNX, the “Seller”) and American Fuel Resources, LLC (“AFR”).
  evidence_url: https://www.sec.gov/Archives/edgar/data/1038277/000143774926008319/0001437749-26-008319-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.