Cover - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Mar. 31, 2025	Jun. 30, 2024
Cover [Abstract]
Entity Registrant Name	ASP Isotopes Inc.
Entity Central Index Key	0001921865
Document Type	10-K/A
Amendment Flag	true
Entity Voluntary Filers	No
Current Fiscal Year End Date	--12-31
Entity Well Known Seasoned Issuer	No
Entity Small Business	true
Entity Shell Company	false
Entity Emerging Growth Company	true
Entity Current Reporting Status	Yes
Document Period End Date	Dec. 31, 2024
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	FY
Document Fiscal Year Focus	2025
Entity Ex Transition Period	false
Entity Common Stock Shares Outstanding		72,068,059
Entity Public Float			$ 96.0
Document Annual Report	true
Document Transition Report	false
Document Fin Stmt Error Correction Flag	false
Entity File Number	001-41555
Entity Incorporation State Country Code	DE
Entity Tax Identification Number	87-2618235
Entity Address Address Line 1	601 Pennsylvania Avenue NW
Entity Address Address Line 2	South Building
Entity Address Address Line 3	Suite 900
Entity Address City Or Town	Washington
Entity Address State Or Province	DC
Entity Address Postal Zip Code	20004
City Area Code	202
Amendment Description	ASP Isotopes Inc. (“ASP Isotopes,” the “Company,” “we,” “us,” or “our”) is filing this Amendment No. 1 on Form 10-K/A (this “Amendment”) to amend our Annual Report on Form 10-K for the fiscal year ended December 31, 2024, originally filed with the Securities and Exchange Commission (the “SEC”) on March 31, 2025 (the “Original Filing”), to include the information required by Items 10 through 14 of Part III of Form 10-K.  We previously omitted this information from our Original Filing in reliance on General Instruction G(3) to Form 10-K, which permits the information in the above-referenced items to be incorporated in the Original Filing by reference to our definitive proxy statement if such statement is filed no later than 120 days after our fiscal year-end.  We are filing this Amendment to provide the information required in Part III of Form 10-K because we will not file a definitive proxy statement containing that information within 120 days after the end of the fiscal year covered by our Original Filing. This Amendment amends and restates in their entirety Items 10, 11, 12, 13 and 14 of Part III of our Original Filing.  The cover page of our Original Filing is also amended to delete the reference to the incorporation by reference of portions of our definitive proxy statement into Part III of the Original Filing.  In addition, as required by Rule 12b-15 under the Securities Exchange Act of 1934, as amended (the “Exchange Act”), Item 15 of Part IV of the Original Filing is hereby amended solely to include, as Exhibits 31.3 and 31.4, new certifications by the Company’s Principal Executive Officer and Principal Financial Officer pursuant to Rule 13a-14(a) under the Exchange Act. Except as described above, this Amendment does not amend any other information set forth in the Original Filing, and the Company has not updated disclosures included therein to reflect any subsequent events. Accordingly, this Amendment should be read in conjunction with our Original Filing and with our filings with the SEC subsequent to the Original Filing.
Icfr Auditor Attestation Flag	false
Local Phone Number	756-2245
Security 12b Title	Common stock, par value $0.01 per share
Trading Symbol	ASPI
Security Exchange Name	NASDAQ
Entity Interactive Data Current	Yes