Empirical Formula of Dantrolene (CAS NO.7261-97-4): : C₁₄H₁₀N₄O₅
Structure of Dantrolene (CAS NO.7261-97-4):
          
Molecular Weight: 314.253 
EINECS: 230-684-8 
Index of Refraction: 1.715
Density: 1.57 g/cm³
IUPAC Name: 1-[(E)-[5-(4-Nitrophenyl)furan-2-yl]methylideneamino]imidazolidine-2,4-dione
Canonical SMILES: C1C(=O)NC(=O)N1N=CC2=CC=C(O2)C3=CC=C(C=C3)[N+](=O)[O-]
Isomeric SMILES: C1C(=O)NC(=O)N1/N=C/C2=CC=C(O2)C3=CC=C(C=C3)[N+](=O)[O-]
InChI: InChI=1S/C14H10N4O5/c19-13-8-17(14(20)16-13)15-7-11-5-6-12(23-11)9-1-3-10(4-2-9)18(21)22/h1-7H,8H2,(H,16,19,20)/b15-7+
InChIKey: OZOMQRBLCMDCEG-VIZOYTHASA-N

 Dantrolene (CAS NO.7261-97-4) was first described in the scientific literature in 1967, proposed as a new class of muscle relaxant, and it was widely used in the management of spasticity and reported in a landmark 1975 article published in the British Journal of Anaesthesia.Its efficacy in humans was later confirmed in a large, multicenter study published in 1982.

 Dantrolene (CAS NO.7261-97-4) is the only specific and effective treatment for malignant hyperthermia, a rare, life-threatening disorder triggered by general anesthesia, and is also used in the management of neuroleptic malignant syndrome, muscle spasticity, serotonin syndrome, ecstasy intoxication, and 2,4-dinitrophenol poisoning.

Questionable human carcinogen producing Hodgkin's disease. When heated to decomposition it emits toxic fumes of NO_x.

 Dantrolene ,its cas register number is 7261-97-4. It also can be called Dantrium ; Hydantoin, 1-((5-(p-nitrophenyl)furfurylidene)amino)- ; and 2,4-Imidazolidinedione, 1-(((5-(4-nitrophenyl)-2-furanyl)methylene)amino)- . It gave positive results in animal high dose studies regarding mutagenicity and carcinogenity.And it depresses excitation-contraction coupling in skeletal muscle by binding to the ryanodine receptor, and decreasing intracellular calcium concentration. Dantrolene (CAS NO.7261-97-4) should not be given to breastfeeding mothers.