A synthetic form of thyroid hormone, Thyroxine. Levothyroxine is used in the treatment of thyroid hormone deficiency and certain types of thyroid tumors. It is a levorotatory enantiomer of Thyroxine. Reference standards of Levothyroxine API,and its pharmacopeial, non pharmacopeial impurities, and stable isotopes are listed below.
stdClass Object ( [pname] => Levothyroxine - API Standards [catalogue_number] => PA 12 15000 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 776.87 [form] => C15H11I4NO4 [cas] => 51-48-9 [pslug] => 51-48-9-levothyroxine-api-pa1215000 [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 15000
CAS :
Molecular Formula : C15H11I4NO4
Molecular Weight : 776.87
stdClass Object ( [pname] => Levothyroxine - Impurity A [catalogue_number] => PA 12 15010 [category_ids] => ,70,71,75,78,79,80,82, [chemical_name] => [weight] => 650.97 [form] => C15H12I3NO4 [cas] => 6893-02-3 [pslug] => 6893-02-3-levothyroxine-impurity-a-pa1215010 [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 15010
Molecular Formula : C15H12I3NO4
Molecular Weight : 650.97
stdClass Object ( [pname] => Levothyroxine - Impurity B [catalogue_number] => PA 12 15020 [category_ids] => ,79,80,75,78,70,82, [chemical_name] => [weight] => 685.42 [form] => C15H11ClI3NO4 [cas] => 1628720-66-0 [pslug] => 1628720-66-0-levothyroxine-impurity-b-pa1215020 [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 15020
Molecular Formula : C15H11ClI3NO4
Molecular Weight : 685.42
stdClass Object ( [pname] => Levothyroxine - Impurity F [catalogue_number] => PA 12 15060 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 1120.76 [form] => C21H13I6NO5 [cas] => 911661-90-0 [pslug] => 911661-90-0-levothyroxine-impurity-f-pa1215060 [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 15060
Molecular Formula : C21H13I6NO5
Molecular Weight : 1120.76
stdClass Object ( [pname] => Levothyroxine N-Methylamide [catalogue_number] => PA 12 15540 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 789.91 [form] => C16H14I4N2O3 [cas] => 2088032-52-2 [pslug] => 2088032-52-2-levothyroxine-n-methylamide-pa1215540 [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 15540
Molecular Formula : C16H14I4N2O3
Molecular Weight : 789.91
stdClass Object ( [pname] => O-(4-Hydroxy-3,5-diiodophenyl)-3,5-diiodo-hydroxy-L-tyrosine [catalogue_number] => PA 12 15550 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 792.87 [form] => C15H11I4NO5 [cas] => 2749357-47-7 [pslug] => 2749357-47-7-o-4-hydroxy-3-5-diiodophenyl-3-5-diiodo-hydroxy-l-tyrosine-pa1215550 [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 15550
Molecular Formula : C15H11I4NO5
Molecular Weight : 792.87
stdClass Object ( [pname] => Levothyroxine - Impurity G [catalogue_number] => PA 12 15560 [category_ids] => 82,80,79,78,75,71,70 [chemical_name] => [weight] => 746.89 [form] => C15H13I4NO2 [cas] => 2230724-39-5 [pslug] => 2230724-39-5-levothyroxine-impurity-g-pa1215560 [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 15560
Molecular Formula : C15H13I4NO2
Molecular Weight : 746.89
stdClass Object ( [pname] => 2-Acetamido-3-(4-acetoxy-3,5-diiodophenyl)propanoic Acid [catalogue_number] => PA 12 15570 [category_ids] => ,79,80,78,70,82,71, [chemical_name] => [weight] => 517.05 [form] => C13H13I2NO5 [cas] => 153324-21-1 [pslug] => 153324-21-1-2-acetamido-3-4-acetoxy-3-5-diiodophenyl-propanoic-acid-pa1215570 [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 15570
Molecular Formula : C13H13I2NO5
Molecular Weight : 517.05
stdClass Object ( [pname] => β-Hydroxy Thyroxine [catalogue_number] => PA 12 15580 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 792.87 [form] => C15H11I4NO5 [cas] => 107849-54-7 [pslug] => 107849-54-7-beta-hydroxy-thyroxine-pa1215580 [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 15580
stdClass Object ( [pname] => Monochlorotriiodothyronine [catalogue_number] => PA 12 15590 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 685.42 [form] => C15H11ClI3NO4 [cas] => 909279-46-5 [pslug] => 909279-46-5-monochlorotriiodothyronine-pa1215590 [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 15590
stdClass Object ( [pname] => DL-Thyroxine [catalogue_number] => PA 12 15600 [category_ids] => ,79,80,78,70,82,71, [chemical_name] => [weight] => 776.87 [form] => C15H11I4NO4 [cas] => 300-30-1 [pslug] => 300-30-1-dl-thyroxine-pa1215600 [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 15600
stdClass Object ( [pname] => (S)-2-Amino-3-(4-(4-(4-hydroxy-3-iodophenoxy)-3,5-diiodophenoxy)-3,5-diiodophenyl)propanoic Acid [catalogue_number] => PA 12 15610 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 994.86 [form] => C21H14I5NO5 [cas] => 2086274-34-0 [pslug] => 2086274-34-0-s-2-amino-3-4-4-4-hydroxy-3-iodophenoxy-3-5-diiodophenoxy-3-5-diiodophenyl-propanoic-acid-pa1215610 [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 15610
Molecular Formula : C21H14I5NO5
Molecular Weight : 994.86
stdClass Object ( [pname] => 2-Hydroxy-2-(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)-N-methylacetamide [catalogue_number] => PA 12 15620 [category_ids] => ,79,80,78,70,82,71, [chemical_name] => [weight] => 776.87 [form] => C15H11I4NO4 [cas] => 2088032-68-0 [pslug] => 2088032-68-0-2-hydroxy-2-4-4-hydroxy-3-5-diiodophenoxy-3-5-diiodophenyl-n-methylacetamide-pa1215620 [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 15620
stdClass Object ( [pname] => (S)-2-Amino-3-(4-(4-(4-hydroxy-3,5-diiodophenoxy)-3-iodophenoxy)-3,5-diiodophenyl)propanoic Acid [catalogue_number] => PA 12 15630 [category_ids] => ,79,80,78,70,82,71, [chemical_name] => [weight] => 994.86 [form] => C21H14I5NO5 [cas] => 2514763-69-8 [pslug] => 2514763-69-8-s-2-amino-3-4-4-4-hydroxy-3-5-diiodophenoxy-3-iodophenoxy-3-5-diiodophenyl-propanoic-acid-pa1215630 [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 15630
stdClass Object ( [pname] => 4-(4-Hydroxy-3,5-diiodophenoxy)-3,5-diiodo-N-methylbenzamide [catalogue_number] => PA 12 15640 [category_ids] => 82,80,79,78,71,70 [chemical_name] => [weight] => 746.84 [form] => C14H9I4NO3 [cas] => 2088032-78-2 [pslug] => 2088032-78-2-4-4-hydroxy-3-5-diiodophenoxy-3-5-diiodo-n-methylbenzamide-pa1215640 [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 15640
Molecular Formula : C14H9I4NO3
Molecular Weight : 746.84
stdClass Object ( [pname] => 3,4-Bis(4-(4-hydroxy-3,5-diiodophenoxy)-3,5-diiodophenyl)-1H-pyrrole-2-carboxylic acid [catalogue_number] => PA 12 15650 [category_ids] => ,79,80,78,70,82,71, [chemical_name] => [weight] => 1486.65 [form] => C29H13I8NO6 [cas] => 2088032-81-7 [pslug] => 2088032-81-7-3-4-bis-4-4-hydroxy-3-5-diiodophenoxy-3-5-diiodophenyl-1h-pyrrole-2-carboxylic-acid-pa1215650 [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 15650
Molecular Formula : C29H13I8NO6
Molecular Weight : 1486.65
stdClass Object ( [pname] => Levothyroxine Lactose Adduct [catalogue_number] => PA 12 15660 [category_ids] => ,70,78,79,80,82,91, [chemical_name] => [weight] => 1101.15 [form] => C27H31I4NO14 [cas] => NA [pslug] => levothyroxine-lactose-adduct-pa1215660 [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 15660
Molecular Formula : C27H31I4NO14
Molecular Weight : 1101.15
stdClass Object ( [pname] => Methyl L-tyrosinate, [catalogue_number] => PAI 12 008190 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 195.22 [form] => C10H13NO3 [cas] => NA [pslug] => -methyl-l-tyrosinate-pai12008190 [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.:PAI 12 008190
Molecular Formula : C10H13NO3
Molecular Weight : 195.22
stdClass Object ( [pname] => Methyl (S)-2-amino-3-(3-chloro-4-hydroxyphenyl)propanoate, [catalogue_number] => PAI 12 008200 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 229.66 [form] => C10H12ClNO3 [cas] => NA [pslug] => -methyl-s-2-amino-3-3-chloro-4-hydroxyphenyl-propanoate-pai12008200 [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.:PAI 12 008200
Molecular Formula : C10H12ClNO3
Molecular Weight : 229.66
stdClass Object ( [pname] => Methyl (S)-2-amino-3-(3-chloro-4-hydroxy-5-iodophenyl)propanoate, [catalogue_number] => PAI 12 008210 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 355.56 [form] => C10H11ClINO3 [cas] => NA [pslug] => -methyl-s-2-amino-3-3-chloro-4-hydroxy-5-iodophenyl-propanoate-pai12008210 [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.:PAI 12 008210
Molecular Formula : C10H11ClINO3
Molecular Weight : 355.56
stdClass Object ( [pname] => Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(3-chloro-4-hydroxy-5-iodophenyl)propanoate, [catalogue_number] => PAI 12 008220 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 455.67 [form] => C15H19ClINO5 [cas] => NA [pslug] => -methyl-s-2-tert-butoxycarbonyl-amino-3-3-chloro-4-hydroxy-5-iodophenyl-propanoate-pai12008220 [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.:PAI 12 008220
Molecular Formula : C15H19ClINO5
Molecular Weight : 455.67
stdClass Object ( [pname] => Methyl (S)-2-((tert-butoxycarbonyl)amino)-3-(3-chloro-5-iodo-4-(4-methoxyphenoxy)phenyl)propanoate, [catalogue_number] => PAI 12 008230 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 561.81 [form] => C22H25ClINO6 [cas] => NA [pslug] => -methyl-s-2-tert-butoxycarbonyl-amino-3-3-chloro-5-iodo-4-4-methoxyphenoxy-phenyl-propanoate-pai12008230 [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.:PAI 12 008230
Molecular Formula : C22H25ClINO6
Molecular Weight : 561.81
stdClass Object ( [pname] => (S)-2-amino-3-(3-chloro-4-(4-hydroxyphenoxy)-5-iodophenyl)propanoic acid, [catalogue_number] => PAI 12 008240 [category_ids] => ,71,79,80,78,70,82, [chemical_name] => [weight] => 433.63 [form] => C15H13ClINO4 [cas] => NA [pslug] => -s-2-amino-3-3-chloro-4-4-hydroxyphenoxy-5-iodophenyl-propanoic-acid-pai12008240 [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.:PAI 12 008240
Molecular Formula : C15H13ClINO4
Molecular Weight : 433.63
stdClass Object ( [pname] => Ethyl (S)-2-acetamido-3-(4-(4-methoxyphenoxy)-3,5-dinitrophenyl)propanoate [catalogue_number] => PA 12 0151005 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 447.4 [form] => C20H21N3O9 [cas] => 83290-90-8 [pslug] => 83290-90-8-ethyl-s-2-acetamido-3-4-4-methoxyphenoxy-3-5-dinitrophenyl-propanoate-pa120151005 [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 0151005
Molecular Formula : C20H21N3O9
Molecular Weight : 447.4
stdClass Object ( [pname] => Ethyl (S)-2-acetamido-3-(3,5-diamino-4-(4-methoxyphenoxy)phenyl)propanoate [catalogue_number] => PA 12 0151006 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 387.44 [form] => C20H25N3O5 [cas] => 440667-78-7 [pslug] => 440667-78-7-ethyl-s-2-acetamido-3-3-5-diamino-4-4-methoxyphenoxy-phenyl-propanoate-pa120151006 [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 0151006
Molecular Formula : C20H25N3O5
Molecular Weight : 387.44
stdClass Object ( [pname] => Ethyl (S)-2-acetamido-3-(3,5-diiodo-4-(4-methoxyphenoxy)phenyl)propanoate [catalogue_number] => PA 12 0151007 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 609.2 [form] => C20H21I2NO5 [cas] => 83730-50-1 [pslug] => 83730-50-1-ethyl-s-2-acetamido-3-3-5-diiodo-4-4-methoxyphenoxy-phenyl-propanoate-pa120151007 [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 0151007
Molecular Formula : C20H21I2NO5
Molecular Weight : 609.2
stdClass Object ( [pname] => (S)-2-Acetamido-3-(4-hydroxy-3,5-dinitrophenyl)propanoic Acid [catalogue_number] => PA 12 0151008 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 313.22 [form] => C11H11N3O8 [cas] => 20767-00-4 [pslug] => 20767-00-4-s-2-acetamido-3-4-hydroxy-3-5-dinitrophenyl-propanoic-acid-pa120151008 [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 0151008
Molecular Formula : C11H11N3O8
Molecular Weight : 313.22
stdClass Object ( [pname] => Ethyl (S)-2-acetamido-3-(4-hydroxy-3,5-dinitrophenyl)propanoate [catalogue_number] => PA 12 0151009 [category_ids] => ,70,71,78,79,80,82, [chemical_name] => [weight] => 341.28 [form] => C13H15N3O8 [cas] => 29358-99-4 [pslug] => 29358-99-4-ethyl-s-2-acetamido-3-4-hydroxy-3-5-dinitrophenyl-propanoate-pa120151009 [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 0151009
Molecular Formula : C13H15N3O8
Molecular Weight : 341.28
I accept terms and conditions
Message sent successfully!! We will get back to you shortly ....
