| | Identification | More |  | [Name] 
 2-AMINO-BETA-NAPHTHOTHIAZOLE
 |  | [CAS] 
 40172-65-4
 |  | [Synonyms] 
 SKA 31
 -2-amine
 AKOS BBS-00006561
 IFLAB-BB F1386-0401
 naphtho[1,2-d]thiazoL
 LABOTEST-BB LT00154570
 2-Amino-β-naphthothiazole
 2-AMINONAPHTHO-1,2-THIAZOLE
 2-AMINO-BETA-NAPHTHOTHIAZOLE
 naphtho[1,2-d]thiazol-2-amine
 2-AMINO-NAPHTHO[1,2-D]THIAZOLE
 NAPHTHO[1,2-D]THIAZOL-2-YLAMINE
 Naphtho[1,2-d]thiazol-2(1H)-imine
 benzo[e][1,3]benzothiazol-2-amine
 NAPHTHO[1,2-D][1,3]THIAZOL-2-AMINE
 Naphtho[1,2-d]thiazol-2-amine (9CI)
 2-(2-amino-5,6-dihydro-4H-pyrimidin-1-yl)acetic acid
 |  | [EINECS(EC#)] 
 254-822-1
 |  | [Molecular Formula] 
 C11H8N2S
 |  | [MDL Number] 
 MFCD00051329
 |  | [Molecular Weight] 
 200.26
 |  | [MOL File] 
 40172-65-4.mol
 | 
 | Safety Data | Back Directory |  | [Hazard Codes ] 
 Xn
 |  | [Risk Statements ] 
 R20/21/22:Harmful by inhalation, in contact with skin and if swallowed .
 R36/37/38:Irritating to eyes, respiratory system and skin .
 |  | [Safety Statements ] 
 S22:Do not breathe dust .
 S36/37/39:Wear suitable protective clothing, gloves and eye/face protection .
 | 
 | Hazard Information | Back Directory |  | [Description] 
 SKA-31 (40172-65-4) is a KCa3.1 and KCa2 potassium channel activator (EC50 =260, 2900, 2900 nM for KCa3.1, KCa2.1 and KCa2.2 respectively). Enhanced acetylcholine-induced EDHF dilator response in mouse carotid arteries and lowers blood pressure in mouse models at 30 mg/Kg.1,2 Evokes robust vasodilation in rat mesenteric arteries.3
 |  | [Uses] 
 SKA-31 is a potent potassium channel activator with EC50s of 260 nM, 1.9 μM, 2.9 μM, and 2.9 μM for KCa3.1, KCa2.2, KCa2.1 and KCa2.3, respectively. SKA-31 potentiates endothelium-derived hyperpolarizing factor response and lowers blood pressure[1].
 |  | [Biological Activity] 
 Activator  of  K  Ca  3.1  and  K  Ca  2  channels  (EC  50 values  are  260,  2900,  2900  nM  for  K  Ca  3.1,  K  Ca  2.1  and  K  Ca  2.2  respectively).  Potentiates  acetylcholine-induced  EDHF-type  dilations  of  mouse  carotid  arteries  and  lowers  blood  pressure  in  normotensive  and  hypertensive  mice.
 |  | [in vivo] 
 
 SKA-31 is not acutely toxic and has good pharmacokinetic properties[1].SKA-31 potentiates native KCa3.1 and KCa2.3 in murine carotid endothelium with EC50 values of 225 nM and 1.6 μM for KCa3.1 and KCa2.3, respectively[1].
 SKA-31 stimulates KCa3.1 and KCa2.3 in vascular endothelial cells and increases acetylcholine-induced endothelium-derived hyperpolarizing factor (EDHF) -mediated vasodilation[1].
 SKA-31 potentiates EDHF-type vasodilations and lowers blood pressure in mice. Injections of SKA-31 (1-30 mg/kg; i.p.) lower MAP over 24 hours in normotensive wild-type mice but not in KCa3.1(-/-) mice (-/-)[1].
 
 | Animal Model: | 16-25 weeks mice[1] |  | Dosage: | 1 mg/kg, 10 mg/kg, and 30 mg/kg |  | Administration: | Intraperitoneal injection |  | Result: | Lower MAP over 24 hours in normotensive wild-type mice but not in KCa3.1(-/-) mice (-/-). | 
 |  | [storage] 
 +4°C
 |  | [References] 
 Sankaranaravanan et al. (2009), Naphtho[1,2-d]thiazol-2-ylamine (SKA-31), a new activator of KCa2 and KCa3.1 potassium channels, potentiates the endothelium-derived hyperpolarizing factor response and lowers blood pressure; Mol. Pharmacol., 75 281
Brahler et al. (2009), Genetic deficit of SK3 and IK1 channels disrupts the endothelium-derived hyperpolarizing factor vasodilator and causes hypertension ; Circulation, 119 2323
Khaddaj-Mallat al. (2018), SKA-31, an activator of endothelial Ca2+-activated K+ channels evokes robust vasodilation in rat mesenteric arteries; Eur. J. Pharmacol., 831 60
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