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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Ethoxyquin, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Ethoxyquin impurity reference standards are invaluable for pharmaceutical research, supporting product development, ANDA and DMF submissions, quality control (QC), method validation, and stability studies. They also aid in identifying unknown impurities and assessing genotoxic potential.
Our Ethoxyquin-related products undergo thorough characterization and are supplied with detailed Certificates of Analysis (COA) and analytical data that meet regulatory requirements. All supplied products are re-tested at regular intervals to ensure ongoing quality and compliance.

Ethoxyquin Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-d3-propylen... Stable Isotopes CS-T-47767 1189922-32-4 Enquire
2-(4-((5,6-Dimethoxyquinolin-8-yl)amino)pentyl)isoindoline-1... Stable Isotopes CS-T-98656 Not Available Enquire
2-Piperazinyl-4-amino-6,7-dimethoxyquinazoline-d8 Stable Isotopes CS-T-84260 1246820-89-2 Enquire
4-Chloro-2-propyl-6-trifluoromethoxyquinoline-d8 Stable Isotopes CS-T-96386 168834-43-3 (Unlabelled) Enquire
8-Amino-6-methoxyquinoline-d5 Stable Isotopes CS-T-101907 Not Available Enquire
Ethoxyquin-D5 hydrochloride Stable Isotopes CS-W-00407 Not Available Enquire
N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-(methyl-d3)-2-cyano... Stable Isotopes CS-T-65431 1185144-54-0 Enquire


API Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethoxyquin HCl API Standards CS-AZ-00164 Not Available Enquire
Ethoxyquine API Standards CS-L-00077 91-53-2 In Stock


Metabolites

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
8-Amino-6-methoxyquinolin-5-ol Metabolites CS-CX-00088 67472-57-5 Enquire
8-Amino-6-methoxyquinolin-5-ol dihydrochloride Metabolites CS-CX-00087 860231-00-1 Enquire


Impurities

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"2-Amino-6,7-dimethoxyquinazolin-4(3H)-one" Impurities CS-M-47054 16175-67-0 Enquire
"2-Chloro-6,7-dimethoxyquinazoline" Impurities CS-DJ-00426 94644-47-0 Enquire
"5,8-dimethoxyquinoline" Impurities CS-DV-02996 58868-41-0 Enquire
"7-(3-chloropropoxy)-4-((2,4-dichloro-5-methoxyphenyl)amino)... Impurities CS-O-16268 380844-49-5 Enquire
(1R,2S)-1-(6-((6-bromo-2-methoxyquinolin-3-yl) (phenyl)methy... Impurities CS-O-34383 Not Available Enquire
(1R,2S)-1-(6-(diisopropylamino)-2-methoxyquinolin-3-yl)-4-(d... Impurities CS-O-34382 Not Available Enquire
(1R,2S)-1-(6-bromo-2-methoxyquinolin-3-yl)-3-((dimethylamino... Impurities CS-O-34380 Not Available Enquire
(4-(4-amino-7-hydroxy-6-methoxyquinazolin-2-yl)piperazin-1-y... Impurities CS-O-42124 Not Available Enquire
{(1S,2S,4S,5R)-1-ethyl-2-((R)-hydroxy(6-methoxyquinolin-4-yl... Impurities CS-O-59042 Not Available Enquire
1-(4-((3-chloro-4-fluorophenyl)amino)-7-methoxyquinazolin-6-... Impurities CS-O-37056 2190490-31-2 Enquire
2-(4-allylpiperazin-1-yl)-6,7-dimethoxyquinazolin-4(3H)-imin... Impurities CS-P-07136 Not Available Enquire
2-Hydroxy-7-methoxyquinoline-3-carboxaldehyde Impurities CS-CG-00141 101382-55-2 Enquire
3-Bromo-8-methoxyquinoline Impurities CS-N-05177 103030-27-9 Enquire
4-((6,7-dimethoxyquinolin-4-yl)amino)phenol Impurities CS-O-40386 748707-58-6 Enquire
4-(3-chloro-4-fluorophenylamino)-7-methoxyquinazolin-6-yl ac... Impurities CS-O-31371 788136-89-0 In Stock
4-(4-aminophenoxy)-6-methoxyquinolin-7-ol Impurities CS-O-40387 1355031-15-0 Enquire
4-(6-bromo-2-methoxyquinolin-3-yl)-2-((dimethylamino)methyl)... Impurities CS-O-34381 Not Available Enquire
4-chloro-6-(3-chloropropoxy)-7-methoxyquinazoline Impurities CS-O-39486 692059-41-9 Enquire
4-Chloro-6-hydroxy-7-methoxyquinazoline Impurities CS-M-51712 574745-97-4 Enquire
4-hydroxy-7-methoxyquinoline-6-carboxamide Impurities CS-O-39929 2110414-05-4 In Stock
N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-2-cyanoethyl... Impurities CS-T-02441 76362-28-2 Enquire


Intermediates

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
"2,3-Dichloro-6-methoxyquinoxaline" Intermediates CS-T-91634 39267-04-4 Enquire
"2,4-Dichloro-6-methoxyquinazoline" Intermediates CS-M-42375 105763-77-7 Enquire
"2,4-Dichloro-6-methoxyquinoline" Intermediates CS-EL-00534 70049-46-6 Enquire
"2,4-Dichloro-8-methoxyquinazoline" Intermediates CS-T-17539 61948-60-5 Enquire
"2,4-Dihydroxy-6-methoxyquinoline" Intermediates CS-AC-12503 14300-45-9 Enquire
"2-Methoxyquinoline-6-boronic acid, pinacol ester" Intermediates CS-AC-06522 1201644-36-1 Enquire
"3-(anilinomethyl)-6,7-dimethoxyquinolin-2(1H)-one" Intermediates CS-EL-01179 1557296-84-0 Enquire
"4,6-dimethoxyquinoline-2-carboxylic acid" Intermediates CS-EL-07463 52144-22-6 Enquire
"5,7-Dibromo-8-methoxyquinoline" Intermediates CS-T-88497 17012-49-6 Enquire
"5,8-Dibromo-6-methoxyquinoline" Intermediates CS-T-88820 1187386-37-3 Enquire
"8-Bromo-6-trifluoromethoxyquinoline, HCl" Intermediates CS-T-71265 1261956-53-9 Enquire
(R)-4-((3-chloro-2-fluorophenyl)amino)-7-methoxyquinazolin-6... Intermediates CS-ED-11911 1626387-80-1 Enquire
(R)-5-Oxiranylmethoxyquinoline Intermediates CS-T-38216 145679-40-9 Enquire
1-(2-Hydroxy-2-methylpropyl)-N-(5-((7-methoxyquinolin-4-yl)o... Intermediates CS-ED-05972 913376-83-7 Enquire
1-(3,5-Bis(trifluoromethyl)phenyl)-3-((1R)-(6-methoxyquinoli... Intermediates CS-ED-14919 852913-25-8 Enquire
1-(Ethoxycarbonylmethyl)-6-methoxyquinolinium Bromide Intermediates CS-T-74749 162558-52-3 Enquire
2-(4-((6,7-dimethoxyquinazolin-4-yl)oxy)phenyl)-N-(1-isoprop... Intermediates CS-ED-11912 883986-34-3 Enquire
2-Amino-6,7-dimethoxyquinoline-3-carboxamide Intermediates CS-ED-39889 55149-43-4 Enquire
2-Amino-6,7-dimethoxyquinoline-3-carboxamide hydrochloride Intermediates CS-ED-35505 2108829-95-2 Enquire
2-Amino-8-methoxyquinazoline Intermediates CS-ED-05936 708-15-6 Enquire
2-Chloro-3-ethyl-6-methoxyquinoline Intermediates CS-ED-23799 1031928-07-0 Enquire
2-Chloro-3-methoxyquinoxaline Intermediates CS-AC-12483 32998-25-7 Enquire
2-Chloro-4-ethoxyquinoline Intermediates CS-T-50665 4295-08-3 Enquire
2-Chloro-6-ethoxyquinoline-3-carbonitrile Intermediates CS-ED-24636 937672-26-9 Enquire
2-Chloro-6-fluoro-8-methoxyquinoline Intermediates CS-ED-24370 1086398-43-7 Enquire
2-Chloro-6-methoxyquinoline-3-carbonitrile Intermediates CS-ED-23937 101617-91-8 Enquire
2-chloro-6-methoxyquinoxaline Intermediates CS-AC-12546 55687-11-1 Enquire
2-Chloro-7-methoxyquinazolin-4(3H)-one Intermediates CS-EL-04707 20197-98-2 Enquire
2-chloro-7-methoxyquinazoline Intermediates CS-EL-08824 953039-15-1 Enquire
2-Chloro-8-methoxyquinazoline Intermediates CS-ED-24007 944060-66-6 Enquire
2-Ethoxyquinoline Intermediates CS-AC-12452 46185-83-5 Enquire
2-Methoxyquinoline-6-carbonitrile Intermediates CS-ED-31370 99471-68-8 Enquire
3-(2-aminoethyl)-7-methoxyquinolin-2(1H)-one hydrochloride Intermediates CS-ED-39335 1266685-45-3 Enquire
3-(2-Cyanopropan-2-yl)-N-(3-((7-methoxyquinazolin-4-yl)amino... Intermediates CS-ED-12455 942507-42-8 Enquire
3-(anilinomethyl)-7-methoxyquinolin-2(1H)-one Intermediates CS-EL-04248 947018-31-7 Enquire
3-Amino-7-methoxyquinoline dihydrochloride Intermediates CS-ED-02966 1216228-63-5 Enquire
3-benzyl-6-bromo-2-methoxyquinoline Intermediates CS-O-32114 654655-69-3 In Stock
3-Bromo-4-hydroxy-6-trifluoromethoxyquinoline Intermediates CS-ED-17050 1065087-86-6 Enquire
3-Bromo-4-hydroxy-8-trifluoromethoxyquinoline Intermediates CS-ED-17051 1065087-91-3 Enquire
3-Bromo-6-methoxyquinoline Intermediates CS-EL-04208 14036-96-5 Enquire
3-Bromo-8-methoxyquinolin-4-amine Intermediates CS-ED-04524 1210642-96-8 Enquire
3-chloro-7-methoxyquinoline Intermediates CS-EL-06888 858279-19-3 Enquire
3-fluoro-6-methoxyquinoline Intermediates CS-EL-10615 426842-85-5 Enquire
3-Methoxyquinoline Intermediates CS-M-57072 6931-17-5 Enquire
4-(3-chloro-4-fluorophenylamino)-6-Acetoxy -7-methoxyquinazo... Intermediates CS-O-30856 184475-70-5 Enquire
4-(4-Amino-3-(4-amino-3-chlorophenoxy)phenoxy)-7-methoxyquin... Intermediates CS-ED-40600 2250242-56-7 Enquire
4-(4-Amino-6,7-dimethoxyquinazolin-2-yl)piperazine-1-carbald... Intermediates CS-ED-04891 84050-21-5 Enquire
4,5-Dichloro-8-methoxyquinoline-3-carbonitrile Intermediates CS-ED-25638 1016686-45-5 Enquire
4-Amino-6,7-dimethoxyquinazolin-2(1h)-one Intermediates CS-ED-04378 664347-52-8 Enquire
4-Amino-6-ethoxyquinoline Intermediates CS-ED-12301 948293-13-8 Enquire
4-Amino-6-methoxyquinoline Intermediates CS-EL-03479 6279-51-2 Enquire
4-Bromo-3-chloro-6-methoxyquinoline Intermediates CS-EL-18967 426842-71-9 Enquire
4-Bromo-6-methoxyquinoline Intermediates CS-T-70882 42881-66-3 Enquire
4-Bromo-7-methoxyquinoline Intermediates CS-ED-21981 1070879-27-4 Enquire
4-bromo-8-fluoro-6-methoxyquinolin-3-amine Intermediates CS-EL-08146 724788-53-8 Enquire
4-Bromo-8-methoxyquinoline Intermediates CS-T-68861 103028-31-5 Enquire
4-chloro-2-(4-chlorophenyl)-6,7,8-trimethoxyquinazoline Intermediates CS-O-55431 228118-54-5 Enquire
4-Chloro-2-ethoxyquinoline Intermediates CS-T-50666 91348-94-6 Enquire
4-Chloro-6,7-dimethoxyquinoline Intermediates CS-M-42450 35654-56-9 In Stock
4-chloro-6-methoxyquinazolin-7-ol Intermediates CS-EM-02879 263400-68-6 Enquire
4-Chloro-6-methoxyquinolin-7-ol Intermediates CS-M-57904 205448-31-3 Enquire
4-Chloro-6-methoxyquinoline Intermediates CS-M-46239 874856 Enquire
4-chloro-7-fluoro-6-methoxyquinoline-3-carbonitrile Intermediates CS-O-32429 622369-40-8 Enquire
4-chloro-7-methoxyquinazolin-6-yl acetate Intermediates CS-O-30860 230955-75-6 Enquire
4-chloro-7-methoxyquinoline Intermediates CS-AC-12554 68500-37-8 Enquire
4-Chloro-7-methoxyquinoline-6-carboxamide Intermediates CS-O-32422 417721-36-9 In Stock
4-Chloro-8-methoxyquinazoline Intermediates CS-M-55727 154288-09-2 Enquire
4-Hydroxy-6,7-dimethoxyquinoline-3-carboxylic acid Intermediates CS-ED-40764 26893-22-1 Enquire
4-Hydroxy-8-methoxyquinoline Intermediates CS-AC-12524 21269-34-1 Enquire
4-Methoxyquinolin-8-amine Intermediates CS-ED-03218 59665-93-9 Enquire
4-Methoxyquinoline Intermediates CS-AC-12446 607-31-8 Enquire
5-Amino-8-trifluoromethoxyquinoline Intermediates CS-T-66311 1072944-53-6 Enquire
5-Bromo-8-(bromomethyl)-2-methoxyquinoline Intermediates CS-ED-14985 885687-81-0 Enquire
5-Bromo-8-ethoxyquinoline Intermediates CS-AC-07065 101422-06-4 Enquire
5-Bromo-8-methoxyquinoline Intermediates CS-T-70864 10522-47-1 Enquire
6,7-Dimethoxyquinazolin-4-amine Intermediates CS-ED-10576 21575-13-3 Enquire
6,8-difluoro-4-methoxyquinoline-2-carboxylic acid Intermediates CS-EL-06546 1338651-82-3 Enquire
6-amino-4-(3-chloro-4-(pyridin-2-ylmethoxy)phenylamino)-7-et... Intermediates CS-O-32427 848139-78-6 In Stock
6-amino-4-chloro-7-ethoxyquinoline-3-carbonitrile Intermediates CS-O-32425 848133-87-9 Enquire
6-Amino-7-methoxyquinazolin-4(3H)-one Intermediates CS-ED-12180 130017-55-9 Enquire
6-Bromo-2,4-dichloro-8-methoxyquinazoline Intermediates CS-DJ-00767 864292-36-4 Enquire
6-Bromo-2-chloro-7-methoxyquinazoline Intermediates CS-DJ-00472 953040-63-6 Enquire
6-Bromo-2-chloro-8-methoxyquinazoline Intermediates CS-DJ-00471 953039-14-0 Enquire
6-bromo-3-(2-bromobenzyl)-2-methoxyquinoline Intermediates CS-O-32111 924632-90-6 Enquire
6-Bromo-4-methoxyquinoline Intermediates CS-T-68900 874792-20-8 Enquire
6-Bromo-8-methoxyquinoline Intermediates CS-ED-21992 103028-32-6 Enquire
6-Bromo-8-trifluoromethoxyquinoline Intermediates CS-T-69278 1280786-71-1 Enquire
6-Chloro-2-methoxyquinoline Intermediates CS-AC-12544 1820686-71-2 Enquire
6-Chloro-2-methoxyquinoline-3-carboxylic acid Intermediates CS-T-72955 1542427-87-1 Enquire
6-Ethoxyquinoline-2-carbaldehyde Intermediates CS-ED-28634 100063-12-5 Enquire
6-Fluoro-2-methoxyquinoline Intermediates CS-T-77435 1226808-76-9 Enquire
6-Fluoro-8-methoxyquinoline Intermediates CS-T-76570 887769-92-8 Enquire
6-Hydroxy-4-methoxyquinazoline Intermediates CS-ED-40902 182880-24-6 Enquire
6-Methoxyquinolin-2-amine Intermediates CS-ED-12168 119990-33-9 Enquire
6-Methoxyquinolin-3-amine Intermediates CS-ED-39857 29507-86-6 Enquire
6-Methoxyquinolin-4-ol Intermediates CS-AC-12512 23432-39-5 Enquire
6-Methoxyquinolin-8-ol Intermediates CS-M-42448 477601-28-8 Enquire
6-Methoxyquinoline Intermediates CS-T-57848 5263-87-6 Enquire
6-Methoxyquinoline-2-carboxylic acid Intermediates CS-T-82755 75433-99-7 Enquire
6-Methoxyquinoline-3-carboxaldehyde Intermediates CS-T-80665 13669-60-8 Enquire


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-chloro-7-methoxyquinolin-6-ol Fine Chemicals CS-DV-02739 205448-74-4 In Stock
6-Methoxyquinolin-8-amine Fine Chemicals CS-M-42449 90-52-8 In Stock
8-Amino-6-methoxyquinoline hydrobromide Fine Chemicals CS-O-15468 312693-53-1 In Stock
N-(3-chloro-4-fluorophenyl)-6-(3-chloropropoxy)-7-methoxyqui... Fine Chemicals CS-ED-01950 912556-91-3 Enquire
N4-(3-Chloro-4-fluorophenyl)-7-methoxyquinazoline-4,6-diamin... Fine Chemicals CS-O-35196 179552-75-1 Enquire


Building Blocks

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Chloro-4-((6,7-dimethoxyquinolin-4-yl)oxy)aniline Building Blocks CS-O-59670 286371-44-6 Enquire
4-​Chloro-​7-​(3-​chloropropoxy)​-​3-​cyano-​6-​methoxyquino... Building Blocks CS-T-95861 214470-68-5 Enquire
5-Bromo-8-trifluoromethoxyquinoline Building Blocks CS-T-70850 1065074-23-8 Enquire
7-Chloro-4- Methoxyquinoline Building Blocks CS-O-54003 26707-52-8 In Stock
8-Bromo-6-trifluoromethoxyquinoline Building Blocks CS-T-71087 1020253-25-1 Enquire


Pesticide Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethoxyquin Dimer Pesticide Standards CS-T-54353 74681-77-9 Enquire