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 - API Standards [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] => 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] => 38028 [offers_product_code] => PA 12 53000 [offers_master_id] => 8 [offer_percentage] => 20 % OFF [offers_product_main_cat] => Pharmaceutical Reference Standards )
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] => 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
stdClass Object ( [pname] => 4,4'-Methylenedibenzonitrile [catalogue_number] => PA 12 0531005 [category_ids] => ,71,78,70,82, [chemical_name] => [weight] => 218.26 [form] => C15H10N2 [cas] => 10466-37-2 [pslug] => 10466-37-2-4-4-methylenedibenzonitrile-pa120531005 [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] => 37580 [offers_product_code] => PA 12 0531005 [offers_master_id] => 8 [offer_percentage] => 20 % OFF [offers_product_main_cat] => Pharmaceutical Reference Standards )
Catalogue No.:PA 12 0531005
Molecular Formula : C15H10N2
Molecular Weight : 218.26
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-((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] => Letrozole-d4 (major) [catalogue_number] => PA STI 056360 [category_ids] => ,81,98,78,70,82, [chemical_name] => [weight] => 289.33 [form] => C17H7D4N5 [cas] => 1133712-96-5 [pslug] => 1133712-96-5-letrozole-d4-major-pasti056360 [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 STI 056360
Molecular Formula : C17H7D4N5
Molecular Weight : 289.33
stdClass Object ( [pname] => 4-((4-Cyanophenyl)(1H-1,2,4-triazol-1-yl)methyl)benzoic Acid [catalogue_number] => PA 12 53540 [category_ids] => ,78,70,82, [chemical_name] => [weight] => 304.31 [form] => C17H12N4O2 [cas] => NA [pslug] => 4-4-cyanophenyl-1h-1-2-4-triazol-1-yl-methyl-benzoic-acid-pa1253540 [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 53540
Molecular Formula : C17H12N4O2
Molecular Weight : 304.31
stdClass Object ( [pname] => 4,4'-((1H-1,2,4-Triazol-1-yl)methylene)dibenzoic Acid [catalogue_number] => PA 12 53550 [category_ids] => ,78,70,82, [chemical_name] => [weight] => 323.31 [form] => C17H13N3O4 [cas] => 1644566-39-1 [pslug] => 1644566-39-1-4-4-1h-1-2-4-triazol-1-yl-methylene-dibenzoic-acid-pa1253550 [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 53550
Molecular Formula : C17H13N3O4
Molecular Weight : 323.31
stdClass Object ( [pname] => Letrozole N-Oxide 1 [catalogue_number] => PA 12 53560 [category_ids] => ,78,70,82, [chemical_name] => [weight] => 301.31 [form] => C17H11N5O [cas] => NA [pslug] => letrozole-n-oxide-1-pa1253560 [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 53560
Molecular Formula : C17H11N5O
Molecular Weight : 301.31
stdClass Object ( [pname] => Letrozole N-Oxide [catalogue_number] => PA 12 53570 [category_ids] => ,78,70,82, [chemical_name] => [weight] => 301.31 [form] => C17H11N5O [cas] => 2982528-88-9 [pslug] => 2982528-88-9-letrozole-n-oxide-pa1253570 [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 53570
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
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
stdClass Object ( [pname] => 4-(Chloromethyl)benzonitrile [catalogue_number] => PA 12 0531004 [category_ids] => ,71,78,70,82, [chemical_name] => [weight] => 151.59 [form] => C8H6ClN [cas] => 874-86-2 [pslug] => 874-86-2-4-chloromethyl-benzonitrile-pa120531004 [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 0531004
Molecular Formula : C8H6ClN
Molecular Weight : 151.59
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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