Titanium yellow, also nickel antimony titanium yellow, nickel antimony titanium yellow rutile, CI Pigment Yellow 53, or C.I. 77788, is a yellow pigment with the chemical composition of NiO.Sb2O5.20TiO2. Its CAS number is [1]. It is a complex inorganic compound. Its melting point lies above 1000 °C, and has extremely low solubility in water. While it contains antimony and nickel, their bioavailability is very low, so the pigment is relatively safe. The pigment has crystal lattice of rutile, with 2-5% of titanium ions replaced with nickel(II) and 9-12% of them replaced with antimony(V).