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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
2-(4-((5,6-Dimethoxyquinolin-8-yl)amino)pentyl)isoindoline-1... Stable Isotopes CS-T-98656 Not Available 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
2-Piperazinyl-4-amino-6,7-dimethoxyquinazoline-d8 Stable Isotopes CS-T-84260 1246820-89-2 Enquire
Ethoxyquin-D5 hydrochloride Stable Isotopes CS-W-00407 3659-01-6(Unlabelled) Enquire
N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-d3-propylene... Stable Isotopes CS-T-47767 1189922-32-4 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethoxyquine API CS-L-00077 91-53-2 In Stock
Ethoxyquin HCl API CS-AZ-00164 Not Available Enquire
Ethoxyquin hydrochloride API CS-W-00406 3659-01-6 Enquire


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
8-Amino-6-methoxyquinolin-5-ol Metabolite CS-CX-00088 67472-57-5 Enquire
8-Amino-6-methoxyquinolin-5-ol dihydrochloride Metabolite CS-CX-00087 860231-00-1 Enquire
(1’-(4-((4-Chlorophenylamino)-6,7-dimethoxyquinazolin-2-yl)-... Metabolite CS-O-43518 864289-53-2 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
(4-(4-amino-7-hydroxy-6-methoxyquinazolin-2-yl)piperazin-1-y... Impurity CS-O-42124 Not Available Enquire
{(1S,2S,4S,5R)-1-ethyl-2-((R)-hydroxy(6-methoxyquinolin-4-yl... Impurity CS-O-59042 ---- Enquire
4-(3-chloro-4-fluorophenylamino)-7-methoxyquinazolin-6-yl ac... Impurity CS-O-31371 788136-89-0 In Stock
4-hydroxy-7-methoxyquinoline-6-carboxamide Impurity CS-O-39929 2110414-05-4 In Stock
7-(3-chloropropoxy)-4-((2,4-dichloro-5-methoxyphenyl)amino)-... Impurity CS-O-16268 380844-49-5 Enquire
(1R,2S)-1-(6-((6-bromo-2-methoxyquinolin-3-yl) (phenyl)methy... Impurity CS-O-34383 Not Available Enquire
(1R,2S)-1-(6-(diisopropylamino)-2-methoxyquinolin-3-yl)-4-(d... Impurity CS-O-34382 Not Available Enquire
(1R,2S)-1-(6-bromo-2-methoxyquinolin-3-yl)-3-((dimethylamino... Impurity CS-O-34380 Not Available Enquire
1-(4-((3-chloro-4-fluorophenyl)amino)-7-methoxyquinazolin-6-... Impurity CS-O-37056 2190490-31-2 Enquire
2-([1,4'-Bipiperidin]-1'-yl)-N-(4-chlorophenyl)-6,7-dimethox... Impurity CS-O-43874 Not Available Enquire
2-(4-allylpiperazin-1-yl)-6,7-dimethoxyquinazolin-4(3H)-imin... Impurity CS-P-07136 Not Available Enquire
2-Amino-6,7-dimethoxyquinazolin-4(3H)-one Impurity CS-M-47054 16175-67-0 Enquire
2-Chloro-6,7-dimethoxyquinazoline Impurity CS-DJ-00426 94644-47-0 Enquire
2-Hydroxy-7-methoxyquinoline-3-carboxaldehyde Impurity CS-CG-00141 101382-55-2 Enquire
3-Bromo-8-methoxyquinoline Impurity CS-N-05177 103030-27-9 Enquire
4-((6,7-dimethoxyquinolin-4-yl)amino)phenol Impurity CS-O-40386 748707-58-6 Enquire
4-(3-chloro-4-(3,3-dimethylureido)phenoxy)-7-methoxyquinolin... Impurity CS-O-39956 Not Available Enquire
4-(4-acetamido-3-chlorophenoxy)-7-methoxyquinoline-6-carboxa... Impurity CS-O-39930 Not Available Enquire
4-(4-aminophenoxy)-6-methoxyquinolin-7-ol Impurity CS-O-40387 1355031-15-0 Enquire
4-(6-bromo-2-methoxyquinolin-3-yl)-2-((dimethylamino)methyl)... Impurity CS-O-34381 Not Available Enquire
4-chloro-5-methoxyquinoline-6-carboxamide Impurity CS-O-40173 Not Available Enquire
4-chloro-6-(3-chloropropoxy)-7-methoxyquinazoline Impurity CS-O-39486 692059-41-9 Enquire
4-Chloro-6-hydroxy-7-methoxyquinazoline Impurity CS-M-51712 574745-97-4 Enquire
5,8-dimethoxyquinoline Impurity CS-DV-02996 58868-41-0 Enquire
methyl 4-chloro-5-methoxyquinoline-6-carboxylate Impurity CS-O-40172 Not Available Enquire
methyl 4-hydroxy-5-methoxyquinoline-6-carboxylate Impurity CS-O-40171 Not Available Enquire
N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-methyl-2-cyanoethyl... Impurity CS-T-02441 76362-28-2 Enquire
N-(6-methoxyquinoline-8-yl)pentane-1,3-diamine Impurity CS-O-41329 2514706-15-9 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Benzyl-6-bromo-2-methoxyquinoline Intermediate CS-O-32114 654655-69-3 In Stock
4-chloro-2-(4-chlorophenyl)-6,7,8-trimethoxyquinazoline Intermediate CS-O-55431 228118-54-5 Enquire
4-Chloro-7-methoxyquinoline-6-carboxamide Intermediate CS-O-32422 417721-36-9 In Stock
6,7-dimethoxyquinolin-4(1H)-one Intermediate CS-O-49222 127285-54-5 Enquire
6-amino-4-(3-chloro-4-(pyridin-2-ylmethoxy)phenylamino)-7-et... Intermediate CS-O-32427 848139-78-6 In Stock


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
6,7-Dimethoxyquinazoline Fine Chemicals CS-O-54453 4101-33-1 Enquire
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
2-methoxyquinolin-7-amine Fine Chemicals CS-ZB-18844 1354222-16-4 Enquire
6-Methoxyquinaldine Fine Chemicals CS-M-02631 1078-28-0 Enquire
7-Bromo-6-methoxyquinazolin-4(3H)-one Fine Chemicals CS-ED-01435 1698027-08-5 Enquire
8-Methoxyquinazolin-4-ol Fine Chemicals CS-MM-47100 16064-27-0 Enquire
N-(3-chloro-4-fluorophenyl)-6-(3-chloropropoxy)-7-methoxyqui... Fine Chemicals CS-ED-01950 912556-91-3 Enquire


Secondary Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethoxyquin Secondary Standards CS-SS-26118 91-53-2 Enquire


Stable Isotope Reagent

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-(4-Amino-6,7-dimethoxyquinazol-2-yl)-N-(methyl-d3)-2-cyano... Stable Isotope Reagent CS-T-65431 1185144-54-0 Enquire


Pesticide Standards

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Ethoxyquin Dimer Pesticide Standards CS-T-54353 74681-77-9 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
7-Chloro-4- Methoxyquinoline Building Blocks CS-O-54003 26707-52-8 In Stock
4-Chloro-8-methoxyquinoline-3-carbonitrile Building Blocks CS-TB-05561 214476-78-5 Enquire
5-Bromo-8-trifluoromethoxyquinoline Building Blocks CS-T-70850 1065074-23-8 Enquire
8-Bromo-6-trifluoromethoxyquinoline Building Blocks CS-T-71087 1020253-25-1 Enquire