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H33460 3-Amino-4-bromo-1H-indazole, 97%

CAS Number

Stock No. Size Price ($) Quantity Availability
H33460-MD 250mg 85.80
H33460-03 1g 238.00
H33460-06 5g 650.00
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3-Amino-4-bromo-1H-indazole, 97%


Chemical Properties

Formula Weight
Melting point
Storage & Sensitivity
Ambient temperatures.
Slightly soluble.


Microwave heating of 2-halobenzaldehydes or 2-haloacetophenones with phenylhydrazines at 160°C for 10 min quantitatively yielded the arylhydrazones, which were further cyclized to give 1-aryl-1H-indazoles via CuI/diamine-catalyzed N-arylation under microwave heating (160°C, 10 min). Good to excellent yields were observed for 2-iodo, 2-bromo, and 2-chloro benzaldehydes or acetophenones.


Store in cool place. Keep container tightly closed in a dry and well-ventilated place. Store away from strong oxidizing agents. Refrigerate 2-7°C.

Literature References

Regina Zibuck,; Mark A. Stahl,; Bobbi Barchiesi,; Peter S. Waalwijk,; Pauline Cohen-Fernandes,; Clarisse L. Habraken. Indazoles studies. 4. Thermolysis of 3-bromo-1-nitro-1H-indazoles in benzene and toluene. Formation of 1-phenyl-1H-indazoles. J. Org. Chem. 1984 , 49(18) ,3310-3314.

Chittari Pabba,; Hong-Jun Wang,; Susan R. Mulligan,; Zhen-Jia Chen,; Todd M. Stark,; Brian T. Gregg. Microwave-assisted synthesis of 1-aryl-1H-indazoles via one-pot two-step Cu-catalyzed intramolecular N-arylation of arylhydrazones. Tetrahedron Letters. 2005, 46 (44), 7553-7557.

GHS Hazard and Precautionary Statements

Hazard Statements: H302-H315-H319-H335

Harmful if swallowed. Causes skin irritation. Causes serious eye irritation. May cause respiratory irritation.

Precautionary Statements: P261-P264b-P270-P271-P280-P301+P312-P302+P352-P304+P340-P305+P351+P338-P312-P330-P332+P313-P337+P313-P362-P501c

Avoid breathing dust/fume/gas/mist/vapours/spray. Wash face, hands and any exposed skin thoroughly after handling Do not eat, drink or smoke when using this product. Use only outdoors or in a well-ventilated area. Wear protective gloves/protective clothing/eye protection/face protection. IF SWALLOWED: Call a POISON CENTER or doctor/physician if you feel unwell. IF ON SKIN: Wash with plenty of soap and water. IF INHALED: Remove to fresh air and keep at rest in a position comfortable for breathing. IF IN EYES: Rinse cautiously with water for several minutes. Remove contact lenses, if present and easy to do. Continue rinsing. Rinse mouth. If skin irritation occurs: Get medical advice/attention. If eye irritation persists: Take off contaminated clothing and wash before reuse. Dispose of contents/ container to an approved waste disposal plant

Other References

Hazard Class
Packing Group
Harmonized Tariff Code


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