COVER PAGE - shares	6 Months Ended
	Jun. 30, 2020	Aug. 07, 2020
Cover [Abstract]
Entity Registrant Name	SALARIUS PHARMACEUTICALS, INC.
Entity Central Index Key	0001615219
Current Fiscal Year End Date	--12-31
Entity Filer Category	Non-accelerated Filer
Document Type	10-Q
Document Period End Date	Jun. 30, 2020
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q2
Amendment Flag	false
Entity Small Business	true
Entity Emerging Growth Company	true
Entity Ex Transition Period	true
Entity Common Stock, Shares Outstanding		19,820,361
Entity Current Reporting Status	Yes
Entity Shell Company	false
Title of 12(b) Security	Common Stock, $ 0.0001 par value
Trading Symbol	SLRX
Security Exchange Name	NASDAQ
Document Quarterly Report	true
Document Transition Report	false
Entity File Number	001-36812
Entity Incorporation, State or Country Code	DE
Entity Address, Address Line One	2450 Holcombe Blvd
Entity Address, Address Line Two	Suite X
Entity Address, City or Town	Houston
Entity Address, State or Province	TX
Entity Address, Postal Zip Code	77021
Entity Tax Identification Number	46-5087339
City Area Code	832
Local Phone Number	834-6992
Entity Interactive Data Current	Yes