Letrozole is also used to help prevent the cancer from returning. Some breast cancers are made to grow faster by a natural hormone called estrogen. It is sold under the brand name Femara. Reference standards of Letrozole API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
stdClass Object ( [pname] => Letrozole - Impurity A [catalogue_number] => PA 12 53010 [category_ids] => ,80,75,71,78,70,82, [chemical_name] => [weight] => 285.30 [form] => C17H11N5 [cas] => 112809-52-6 [pslug] => 112809-52-6-letrozole-impurity-a-pa1253010 [latest_product] => 0 [linkproducts] => 0 [offers_id] => 8 [offers_name] => Ready Stock [offers_status] => 1 [offers_start_date] => 2024-12-16 [offers_end_date] => 2024-12-31 [pageview] => 2 [offers_slug] => ready-stock [offers_product_id] => 38031 [offers_product_code] => PA 12 53010 [offers_master_id] => 8 [offer_percentage] => 20 % OFF [offers_product_main_cat] => Pharmaceutical Reference Standards )
Catalogue No.:PA 12 53010
CAS :
Molecular Formula : C17H11N5
Molecular Weight : 285.30
stdClass Object ( [pname] => Letrozole - Impurity B [catalogue_number] => PA 12 53020 [category_ids] => ,80,75,71,78,70,82, [chemical_name] => [weight] => 319.36 [form] => C22H13N3 [cas] => 113402-31-6 [pslug] => 113402-31-6-letrozole-impurity-b-pa1253020 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 12 53020
Molecular Formula : C22H13N3
Molecular Weight : 319.36
stdClass Object ( [pname] => 4-(4-Cyanobenzyl)-1,2,4-triazole [catalogue_number] => PA 12 0531000 [category_ids] => ,123,81,78,75,76,82, [chemical_name] => [weight] => 184.2 [form] => C10H8N4 [cas] => 112809-27-5 [pslug] => 112809-27-5-4-4-cyanobenzyl-1-2-4-triazole-pa120531000 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 12 0531000
Molecular Formula : C10H8N4
Molecular Weight : 184.2
stdClass Object ( [pname] => 4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzamide [catalogue_number] => PA 12 0531001 [category_ids] => ,78,75,76,82, [chemical_name] => [weight] => 321.34 [form] => C17H15N5O2 [cas] => 2170106-13-3 [pslug] => 2170106-13-3-4-4-1h-1-2-4-triazol-1-yl-methylene-dibenzamide-pa120531001 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 12 0531001
Molecular Formula : C17H15N5O2
Molecular Weight : 321.34
stdClass Object ( [pname] => Tris(4-cyanophenyl)methanol [catalogue_number] => PA 12 0531002 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 335.37 [form] => C22H13N3O [cas] => 117678-98-5 [pslug] => 117678-98-5-tris-4-cyanophenyl-methanol-pa120531002 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 12 0531002
Molecular Formula : C22H13N3O
Molecular Weight : 335.37
stdClass Object ( [pname] => Letrozole (IPRS/12/18) -from IPC [catalogue_number] => PA IPRS 12 18 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => NA [form] => NA [cas] => NA [pslug] => letrozole-iprs-12-18-from-ipc-paiprs1218 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA IPRS 12 18
Molecular Formula : NA
Molecular Weight : NA
stdClass Object ( [pname] => Letrozole Mono-Amide Impurity [catalogue_number] => PA 12 0531003 [category_ids] => ,75,76,78,70,82, [chemical_name] => [weight] => 303.33 [form] => C17H13N5O [cas] => 2500927-47-7 [pslug] => 2500927-47-7-letrozole-mono-amide-impurity-pa120531003 [latest_product] => 0 [linkproducts] => 0 [offers_id] => [offers_name] => [offers_status] => [offers_start_date] => [offers_end_date] => [pageview] => [offers_slug] => [offers_product_id] => [offers_product_code] => [offers_master_id] => [offer_percentage] => [offers_product_main_cat] => )
Catalogue No.:PA 12 0531003
Molecular Formula : C17H13N5O
Molecular Weight : 303.33
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