Cover - shares	3 Months Ended
	Mar. 31, 2025	May 20, 2025
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	Mar. 31, 2025
Entity Filer Category	Non-accelerated Filer
Document Fiscal Period Focus	Q1
Document Fiscal Year Focus	2025
Entity Ex Transition Period	false
Entity Common Stock Shares Outstanding		75,061,842
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 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 $0.01per share
Trading Symbol	ASPI
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity Interactive Data Current	Yes
Entity Address Address Line 3	Suite 900