a2-0239-795b881d4054
- Substance key
- a2-0239-795b881d4054
- Table no
- 2
- Substance name
- Hafnium-173
- Atomic number
- 72
- Reportable quantity ci
- 100
- Reportable quantity tbq
- 3.7
Source
- eCFR Versioner full XML — Appendix A to 49 CFR § 172.101 — Office of the Federal Register / NARA · Cleared for reuse
- Read from https://www.ecfr.gov/api/versioner/v1/full/2026-10-07/title-49.xml?part=172 (49 CFR § 172.101, Appendix A, Table 2, data row 239)
- Federal government regulatory text; GPO public-domain policy applies to government work; inspect third-party material separately — terms