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Cover - shares
 6 Months Ended
Jun. 30, 2023
Aug. 11, 2023
Cover [Abstract]    
Entity Registrant Name ASP Isotopes Inc.  
Entity Central Index Key 0001921865  
Document Type 10-Q  
Amendment Flag false  
Current Fiscal Year End Date --12-31  
Entity Small Business true  
Entity Shell Company false  
Entity Emerging Growth Company true  
Entity Current Reporting Status Yes  
Document Period End Date Jun. 30, 2023  
Entity Filer Category Non-accelerated Filer  
Document Fiscal Period Focus Q2  
Document Fiscal Year Focus 2023  
Entity Ex Transition Period false  
Entity Common Stock Shares Outstanding   37,385,684
Entity File Number 001-41555  
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  
Local Phone Number 756-2245  
Security 12b Title Common Stock, par value $0.01 per share  
Trading Symbol ASPI  
Security Exchange Name NASDAQ  
Document Quarterly Report true  
Document Transition Report false  
Entity Interactive Data Current Yes