The C.I. Pigment Blue 27(9CI), with the CAS registry number 12240-15-2, has the IUPAC name of potassium; iron(2+); iron(3+); hexacyanide, For being a kind of dark blue powder, this chemical is insoluble in water, ethanol, and ether and soluble in acid-base, with the product categories including P; Stains and Dyes. When you are using this chemical, do not breathe dust and then avoid contacting with skin and eyes.

The characteristics of this chemical are as below: (1)#H bond acceptors: 6; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 142.74; (5)Exact Mass: 306.852035; (6)MonoIsotopic Mass: 306.852035; (7)Topological Polar Surface Area: 143; (8)Heavy Atom Count: 15; (9)Complexity: 127; (10)Covalently-Bonded Unit Count: 9.

As to its usage, it is widely applied in many ways. It could be used as the painting and lithographic ink in many industries; And it is also used in the coloration of LDPE and Hizex. In addition, it could be used in the coloration of painting, crayon, and other products. 

Additionally, you could convert the following datas into the molecular structure:
(1)Canonical SMILES: [C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[C-]#N.[K+].[Fe+2].[Fe+3]
(2)InChI: InChI=1S/6CN.2Fe.K/c6*1-2;;;/q6*-1;+2;+3;+1
(3)InChIKey: LDQICAMJIICDLF-UHFFFAOYSA-N