Picloram is a systemic herbicide used for general woody plant control. It also controls a wide range of broad-leaved weeds, but most grasses are resistant. A chlorinated derivative of picolinic acid, picloram is in the pyridine family of herbicides.

CAS：1918-02-1
中文别名：4-氨基-3,5,6-三氯吡啶羧酸;4-氨基-3,5,6-三氯吡啶-2-羧酸;4-氨基-3,5,6-三氯-2-皮考林酸;毒莠定;毒莠定101;毒草丹;
英文别名：3,5,6-trichloro-4-amino-picolinic acid;2-Pyridinecarboxylic acid, 4-amino-3,5,6-trichloro-;Picloram;4-Amino-3,5,6-trichloropicolinic acid,4-Amino-3,5,6-trichloropyridine-2-carboxylic acid,Picloram;4-Amino-3,5,6-trichloropyridine-2-carboxylic Acid;4-Amino-3,5,6-trichlor-2-pyridinmethanol;4-Amino-3,5,6-trichloropicolinic acid;4-Amino-3,5,6-trichloropicolinic Acid;2-Pyridinemethanol,4-amino-3,5,6-trichloro;4-amino-3,5,6-trichloropyridine-2-carboxylic acid;4-amino-3,5,6-trichloropicolinic acid;4-amino-3,5,6-trichloro-2-pyridinecarboxylic acid;
分子式：C6H3Cl3N2O2
分子量：241.459
精确质量：239.926
Psa：76.21
Logp：2.9034

RTECS号：TJ7525000
BRN号：479075
MDL号：MFCD00012101
EINECS号：217-636-1
PubChem号：24898671

外观与性状：白色晶体
熔点：200°C (dec.)(lit.)
水溶解性：420 mg/L
储存条件：库房通风低温干燥,与食品原料分开储运

RTECS号：TJ7525000
安全说明：S26
危险类别码：R36
WGK Germany：2
危险品标志：Xi

用途
毒莠定及其盐可迅速地通过叶和根吸收与传导,除十字化科作物外大多数阔叶作物都对该药敏感,大多数禾本科作物是耐药的。