| 摘要 |
PCT No. PCT/GB95/02832 Sec. 371 Date Jul. 17, 1997 Sec. 102(e) Date Jul. 17, 1997 PCT Filed Dec. 5, 1995 PCT Pub. No. WO96/22333 PCT Pub. Date Jul. 25, 1996An azo pyrazolone compound of the formula: wherein Z represents a substituent selected from Cl, Br, F, NO2, SO2R, CO2R, NHSO2R1 and NHCOR1 in which R and R1 are hydrocarbyl groups and the sulphonic acid group in ring A is in the 3- or 4-position relative to the pyrazolyl group, said compound being in the form of a salt, and its use as a pigment.
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