The C3A (cement component), with its CAS registry number 12042-78-3, has the IUPAC name of dialuminum dicalcium oxygen(2-). With its molecular foumula of Al₂Ca₂O5, it has the formula weight of 270.19. For being a kind of white crystal powder, its product categories are including Inorganics. The production method is as below: prepare the raw material of aluminum acid sodium, calcium chloride and calcium hydroxide and then go through the process as the below chemical equation: 2NaAlO₂+CaCl₂→Ca(AlO₂)₂+2NaCl; Ca(AlO₂)₂+2Ca(OH)₂+4H₂O→3CaO·Al₂O₃·6H₂O.
  
The characteristics of C3A (cement component) are as follows: (1)#H bond acceptors: 1; (2)#H bond donors: 0; (3)#Freely Rotating Bonds: 0; (4)Polar Surface Area: 0 Ų; (5)Exact Mass: 213.862832; (6)MonoIsotopic Mass: 213.862832; (7)Topological Polar Surface Area: 5; (8)Heavy Atom Count: 9; (9)Covalently-Bonded Unit Count: 9.

What's more, the following datas could be converted into the molecular structure:
(1)SMILES:[Al+3].[Al+3].[Ca+2].[Ca+2].[O-2].[O-2].[O-2].[O-2].[O-2]
(2)InChI:InChI=1/2Al.2Ca.5O/q2*+3;2*+2;5*-2
(3)InChIKey:HGCYUAJUOYGULZ-UHFFFAOYAB
(4)Std. InChI:InChI=1S/2Al.2Ca.5O/q2*+3;2*+2;5*-2 
(5)Std. InChIKey:HGCYUAJUOYGULZ-UHFFFAOYSA-N