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 [catalogue_number] => PA 12 53000 [category_ids] => ,80,81,71,78,70,82, [chemical_name] => [weight] => 285.30 [form] => C17H11N5 [cas] => 112809-51-5 [pslug] => 112809-51-5-letrozole-api-pa1253000 [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 53000
CAS :
Molecular Formula : C17H11N5
Molecular Weight : 285.30
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] => [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 53010
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'-Dicyanobenzophenone [catalogue_number] => PA 12 53510 [category_ids] => ,80,78,70,82, [chemical_name] => [weight] => 232.24 [form] => C15H8N2O [cas] => 32446-66-5 [pslug] => 32446-66-5-4-4-dicyanobenzophenone-pa1253510 [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 53510
Molecular Formula : C15H8N2O
Molecular Weight : 232.24
stdClass Object ( [pname] => 4-Descyano-4-bromo-letrozole [catalogue_number] => PA 12 53520 [category_ids] => ,80,79,71, [chemical_name] => [weight] => 339.19 [form] => C16H11BrN4 [cas] => 143030-54-0 [pslug] => 143030-54-0-4-descyano-4-bromo-letrozole-pa1253520 [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 53520
Molecular Formula : C16H11BrN4
Molecular Weight : 339.19
stdClass Object ( [pname] => 4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile [catalogue_number] => PA 12 53530 [category_ids] => 82,80,78,71,70 [chemical_name] => [weight] => 184.2 [form] => C10H8N4 [cas] => 112809-25-3 [pslug] => 112809-25-3-4-1h-1-2-4-triazol-1-yl-methyl-benzonitrile-pa1253530 [latest_product] => 0 [linkproducts] => 1 [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 53530
Molecular Formula : C10H8N4
Molecular Weight : 184.2
stdClass Object ( [pname] => 4-((1H-1,2,4-Triazol-1-yl)methyl)benzonitrile Hydrochloride [catalogue_number] => PA 12 0531006 [category_ids] => ,80,71,78,70,82, [chemical_name] => [weight] => 220.66 [form] => C10H9ClN4 [cas] => 112809-26-4 [pslug] => 112809-26-4-4-1h-1-2-4-triazol-1-yl-methyl-benzonitrile-hydrochloride-pa120531006 [latest_product] => 0 [linkproducts] => 1 [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 0531006
Molecular Formula : C10H9ClN4
Molecular Weight : 220.66
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