Crystal Data for C.I. Pigment Yellow 65

The single-crystal data and X-ray powder pattern are reported for C.I. Pigment Yellow 65 [|α-(1-hydroxy-ethylidenejacet-2-methoxy-anilide-α-azo-(4′-methoxy-2′-nitrobenzene)]. The powder patter has been indexed from the cell dimensions given by single crystal measurements; by problems of multiple indexing have been reduced by comapring the powder data with observed single-crystal intensities.