The 5-Bromocytosine, with CAS registry number 2240-25-7, has the systematic name of 6-amino-5-bromopyrimidin-2(1H)-one. This chemical is a kind of light yellow amorphous powder. When use this chemical, do not breathe dust and avoid contact with skin and eyes. What's more, its EINECS is 218-806-8. The main use of this chemical is for organic reagent and medicines intermediates.

Physical properties of 5-Bromocytosine: (1)ACD/LogP: -1.93; (2)# of Rule of 5 Violations: 0; (3)ACD/LogD (pH 5.5): -1.93; (4)ACD/LogD (pH 7.4): -1.97; (5)ACD/BCF (pH 5.5): 1; (6)ACD/BCF (pH 7.4): 1; (7)ACD/KOC (pH 5.5): 2.11; (8)ACD/KOC (pH 7.4): 1.93; (9)#H bond acceptors: 4; (10)#H bond donors: 3; (11)#Freely Rotating Bonds: 1; (12)Polar Surface Area: 35.91 Å²; (13)Index of Refraction: 1.765; (14)Molar Refractivity: 34.85 cm³; (15)Molar Volume: 84.2 cm³; (16)Polarizability: 13.81×10^-24cm³; (17)Surface Tension: 77.5 dyne/cm.

Preparation: this chemical can be prepared by 4-amino-1H-pyrimidin-2-one. This reaction will need reagents LiBr, NaHCO₃ and solvent acetonitrile.  The yield is about 73%.

You can still convert the following datas into molecular structure:
(1)SMILES: BrC=1\C=N/C(=O)NC=1N
(2)InChI: InChI=1/C4H4BrN3O/c5-2-1-7-4(9)8-3(2)6/h1H,(H3,6,7,8,9)
(3)InChIKey: QFVKLKDEXOWFSL-UHFFFAOYAG
(4)Std. InChI: InChI=1S/C4H4BrN3O/c5-2-1-7-4(9)8-3(2)6/h1H,(H3,6,7,8,9)
(5)Std. InChIKey: QFVKLKDEXOWFSL-UHFFFAOYSA-N