The susceptibility showed a sharp cusp at 4.0 K and Curie Weiss fitting to the high temperature susceptibility (20-300K, including a temperature independent paramagnetism term) gave a Weiss temperature, θ , of -7.8(2) K, and an effective moment of 3.27(0.06) µ B , reduced from the spin-only value of 3.87 µ B . Isothermal magnetisation measurements at 2 K and 5 K showed no evidence of hysteresis, with a field-induced transition at around 1.4(1) T observered in the data measured at 2 K. Together, this suggests that Cr[Bi(SCN) 6 ] • H 2 O is an antiferromagnet, with mildly frustrated ratio of f = |θ |/T N = 1.9.