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Cover - USD ($)
 12 Months Ended
Dec. 31, 2023
Apr. 08, 2024
Jun. 30, 2023
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, 2023    
Entity Filer Category Non-accelerated Filer    
Document Fiscal Period Focus FY    
Document Fiscal Year Focus 2023    
Entity Ex Transition Period false    
Entity Common Stock Shares Outstanding   48,923,276  
Entity Public Float     $ 10.2
Document Annual Report true    
Document Transition Report false    
Document Fin Stmt Error Correction Flag false    
Entity File Number 001-39069    
Entity Incorporation State Country Code DE    
Entity Tax Identification Number 87-2618235    
Entity Address Address Line 1 1101 Pennsylvania Avenue NW    
Entity Address Address Line 2 Suite 300    
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. 2 on Form 10-K/A (this “Amendment No.2”) to our Annual Report on Form 10-K for the fiscal year ended December 31, 2023, originally filed with the Securities and Exchange Commission (the “SEC”) on April 10, 2024 (the “Original Filing”), as amended by Amendment No.1 thereto filed with the SEC on April 29, 2024 (“Amendment No.1”), to amend and restate Part II “Item 9A: Controls and Procedures” solely to revise Management’s Annual Report on Internal Controls Over Financial Reporting in order to correct a typographical error to state that, based on management’s evaluation, the Company’s internal control over financial reporting was not effective as of the end of the period covered by the Original Filing due to the material weaknesses previously disclosed in the Original Filing. This Amendment No.2 contains only an updated cover page, this explanatory note, the complete text of Item 9A, the exhibit list, a signature page and the certifications pursuant to Section 302 of the Sarbanes-Oxley Act of 2002. Except as described above, this Amendment No.2 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 No.2 should be read in conjunction with our Original Filing, Amendment No.1 and with our other 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