Over a ring of scalars R without 2-torsion there is, up to a scalar multiple, only one odd product that can be defined on a Kac bimodule to form a Jordan superalgebra. Over a field F with charF ¬= 2,3, the split Kac superalgebra K10(F) is simple. Indeed for any ring R of scalars with 1/6εR, we have a one-to-one correspondence between the associative ideals I of R and the graded ideals X of K10{R) given by I - I = K10(I). For any R with 1/2εR, we have a one-to-one correspondence between the associative ideals I of R and the ideals or outer ideals of the Jordan algebra J(Q, eo) of a split quadratic form Q over R.