Collection: Heterocyclic Building Blocks
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56813-54-8 | 6-Chloro-3-phenyl-1,2,4-triazolo[3,4-a]phthalazine
![CAS RN 56813-54-8 | 6-Chloro-3-phenyl-1,2,4-triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_56813-54-8_867c0eb5-0374-4598-ad94-9201c7697842.jpg?v=1772088111&width=2400)
56813-54-8 | 6-Chloro-3-phenyl-1,2,4-triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $4,464.00
- Sale price
- $1,395.00 - $4,464.00
- Regular price
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2059157-10-5 | 6-Chloro-3-(3-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine
![CAS RN 2059157-10-5 | 6-Chloro-3-(3-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_2059157-10-5_d5c6cf05-d256-44dc-ac41-53cf527e0977.jpg?v=1772088108&width=2400)
2059157-10-5 | 6-Chloro-3-(3-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $3,571.00
- Sale price
- $1,395.00 - $3,571.00
- Regular price
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2361055-13-0 | 4-(6-Chloro[1,2,4]triazolo[3,4-a]phthalazin-3-yl)thiazole
![CAS RN 2361055-13-0 | 4-(6-Chloro[1,2,4]triazolo[3,4-a]phthalazin-3-yl)thiazole](//hoffmanchemicals.com/cdn/shop/files/Image_2361055-13-0_4c5b042b-3bdd-4022-a598-0424d10b7145.jpg?v=1772088105&width=2400)
2361055-13-0 | 4-(6-Chloro[1,2,4]triazolo[3,4-a]phthalazin-3-yl)thiazole
- Regular price
- $1,395.00 - $3,571.00
- Sale price
- $1,395.00 - $3,571.00
- Regular price
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2101477-07-8 | 6-Chloro-3-(thiophen-3-yl)-[1,2,4]triazolo[3,4-a]phthalazine
![CAS RN 2101477-07-8 | 6-Chloro-3-(thiophen-3-yl)-[1,2,4]triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_2101477-07-8_b270a6f8-c38a-4174-83c6-f5836f243c75.jpg?v=1772088103&width=2400)
2101477-07-8 | 6-Chloro-3-(thiophen-3-yl)-[1,2,4]triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $3,571.00
- Sale price
- $1,395.00 - $3,571.00
- Regular price
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220554-06-3 | 6-Chloro-3-(furan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine
![CAS RN 220554-06-3 | 6-Chloro-3-(furan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_220554-06-3_86480c45-bf8f-489c-bbcc-247abed29085.jpg?v=1772088100&width=2400)
220554-06-3 | 6-Chloro-3-(furan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $4,464.00
- Sale price
- $1,395.00 - $4,464.00
- Regular price
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2361055-12-9 | 6-Chloro-3-(thiophen-2-yl)-[1,2,4]triazolo[3,4-a]phthalazine
![CAS RN 2361055-12-9 | 6-Chloro-3-(thiophen-2-yl)-[1,2,4]triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_2361055-12-9_f827049e-2451-49e9-b117-133030968668.jpg?v=1772088098&width=2400)
2361055-12-9 | 6-Chloro-3-(thiophen-2-yl)-[1,2,4]triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $4,464.00
- Sale price
- $1,395.00 - $4,464.00
- Regular price
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2061271-60-9 | 6-Chloro-3-(propan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine
![CAS RN 2061271-60-9 | 6-Chloro-3-(propan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine](//hoffmanchemicals.com/cdn/shop/files/Image_2061271-60-9_286c2164-1a7f-4ea4-983c-5be1c6a3a05e.jpg?v=1772088096&width=2400)
2061271-60-9 | 6-Chloro-3-(propan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine
- Regular price
- $1,395.00 - $4,464.00
- Sale price
- $1,395.00 - $4,464.00
- Regular price
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23069-71-8 | 6-Chloro-3,7,8-trimethyl-[1,2,4]triazolo[4,3-b]pyridazine
![CAS RN 23069-71-8 | 6-Chloro-3,7,8-trimethyl-[1,2,4]triazolo[4,3-b]pyridazine](//hoffmanchemicals.com/cdn/shop/files/Image_23069-71-8_a4d0c9bd-ba41-423e-af3f-dfc8a4a7bf50.jpg?v=1772088094&width=2400)
23069-71-8 | 6-Chloro-3,7,8-trimethyl-[1,2,4]triazolo[4,3-b]pyridazine
- Regular price
- $1,395.00 - $4,464.00
- Sale price
- $1,395.00 - $4,464.00
- Regular price
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![CAS RN 56813-54-8 | 6-Chloro-3-phenyl-1,2,4-triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_56813-54-8_867c0eb5-0374-4598-ad94-9201c7697842.jpg?v=1772088111&width=2400)
![CAS RN 2059157-10-5 | 6-Chloro-3-(3-methoxyphenyl)[1,2,4]triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_2059157-10-5_d5c6cf05-d256-44dc-ac41-53cf527e0977.jpg?v=1772088108&width=2400)
![CAS RN 2361055-13-0 | 4-(6-Chloro[1,2,4]triazolo[3,4-a]phthalazin-3-yl)thiazole](http://hoffmanchemicals.com/cdn/shop/files/Image_2361055-13-0_4c5b042b-3bdd-4022-a598-0424d10b7145.jpg?v=1772088105&width=2400)
![CAS RN 2101477-07-8 | 6-Chloro-3-(thiophen-3-yl)-[1,2,4]triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_2101477-07-8_b270a6f8-c38a-4174-83c6-f5836f243c75.jpg?v=1772088103&width=2400)
![CAS RN 220554-06-3 | 6-Chloro-3-(furan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_220554-06-3_86480c45-bf8f-489c-bbcc-247abed29085.jpg?v=1772088100&width=2400)
![CAS RN 2361055-12-9 | 6-Chloro-3-(thiophen-2-yl)-[1,2,4]triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_2361055-12-9_f827049e-2451-49e9-b117-133030968668.jpg?v=1772088098&width=2400)
![CAS RN 2061271-60-9 | 6-Chloro-3-(propan-2-yl)[1,2,4]triazolo[3,4-a]phthalazine](http://hoffmanchemicals.com/cdn/shop/files/Image_2061271-60-9_286c2164-1a7f-4ea4-983c-5be1c6a3a05e.jpg?v=1772088096&width=2400)
![CAS RN 23069-71-8 | 6-Chloro-3,7,8-trimethyl-[1,2,4]triazolo[4,3-b]pyridazine](http://hoffmanchemicals.com/cdn/shop/files/Image_23069-71-8_a4d0c9bd-ba41-423e-af3f-dfc8a4a7bf50.jpg?v=1772088094&width=2400)