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Clearsynth is a leading innovator in pharmaceutical reference standards, offering high-quality Reference Standards for Erlotinib, including both pharmacopeial and non-pharmacopeial impurities, metabolites, stable isotope products, and nitrosamines (N-NO products). Our Erlotinib 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 Erlotinib-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.

Erlotinib Related Compounds

Stable Isotopes

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Erlotinib D4 Stable Isotopes CS-EO-02363 1130852-41-3 Enquire
Erlotinib-13C6 Hydrochloride Stable Isotopes CS-O-00724 1210610-07-3 In Stock
Erlotinib-d6 Stable Isotopes CS-O-03064 1034651-23-4 In Stock
N-(2-Methoxyethyl) Erlotinib-d3 Stable Isotopes CS-T-100064 Not Available Enquire
N-(3-Desethynylphenyl)-N-(3-bromophenyl) Erlotinib Hydrochlo... Stable Isotopes CS-T-96817 Not Available Enquire
O-Desmethylerlotinib-d4 Stable Isotopes CS-B-00276 Not Available Enquire
Tetrahydro Erlotinib-d9 Stable Isotopes CS-T-99799 Not Available Enquire
3-Ethynylaniline-d4 Stable Isotopes CS-T-92341 1794883-73-0 Enquire
Erlotinib D6 Hydrochloride Stable Isotopes CS-O-11856 1189953-78-3 Enquire
Erlotinib D8 Stable Isotopes CS-O-32666 1266534-68-2 Enquire
O-Desmethyl Erlotiniβ-d8 HCl Stable Isotopes CS-BV-00041 183321-84-8 Enquire
O-Desmethylerlotinib hydrochloride 13C6 Stable Isotopes CS-EK-01115 183320-51-6 unlabeled Enquire
O-Didesmethylerlotinib hydrochloride 13C6 Stable Isotopes CS-EK-01163 1261395-30-5 Enquire
OSI-420-d4, Free Base (Desmethyl Erlotiniβ-d4) Stable Isotopes CS-T-59970 1216420-11-9 Enquire


API

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Erlotinib API CS-O-31362 183321-74-6 In Stock
Erlotinib Hydrochloride API CS-M-58440 183319-69-9 In Stock


Metabolite

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
Erlotinib 4-Hydroxy Metabolite HCl salt Metabolite CS-EO-03532 882420-22-6 (Freebase) Enquire
Erlotinib impurity G Metabolite CS-AQ-00200 2514264-76-5 In Stock
Erlotinib O-Desmethyl Metabolite Isomer (M14) Hydrochloride Metabolite CS-P-07852 183320-51-6 In Stock
Erlotinib Carboxylic Acid Metabolite CS-O-11867 882420-21-5 Enquire
Hydroxy Erlotinib Metabolite CS-O-11868 882420-22-6 Enquire
O-Desmethyl Erlotinib Metabolite CS-O-11869 183321-86-0 Enquire


Impurity

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-Amino-4,5-bis(2-methoxyethoxy)benzoic acid ethyl ester Impurity CS-O-32359 183322-17-0 In Stock
3-Aminophenylacetylene Impurity CS-O-30852 54060-30-9 In Stock
7-(2’-Desmethyl) Erlotinib formate salt Impurity CS-O-36198 Not Available In Stock
Desethynyl Erlotinib Impurity CS-T-73717 1145671-52-8 In Stock
Erlotinib Aldehyde Impurity CS-O-33313 1278586-80-3 Enquire
Erlotinib Amine Impurity Impurity CS-ED-41702 1417161-98-8(free base) Enquire
Erlotinib Impurity 17 Impurity CS-P-07862 183322-16-9 In Stock
Erlotinib Impurity 19 Impurity CS-P-07864 1312937-41-9 In Stock
Erlotinib Impurity 21 Impurity CS-EO-03533 2055841-66-0 Enquire
Erlotinib Impurity 24 Impurity CS-O-32530 938185-06-9 In Stock
Erlotinib Impurity 35 HCl salt Impurity CS-EO-03534 1354727-63-1 (Freebase) Enquire
Erlotinib Impurity A Impurity CS-AQ-00190 13794-72-4 In Stock
Erlotinib Related Compound A Impurity CS-O-46248 299912-59-7 In Stock
Erlotinib USP Related Compound A Impurity CS-EO-03535 299912-60-0 (Freebase) Enquire
N-(2-Methoxyethyl) Erlotinib Impurity CS-T-95872 Not Available In Stock
Tetrahydro Erlotinib Impurity CS-T-86281 299912-61-1 In Stock
4-(3-((6,7-bis(2-methoxyethoxy)quinazolin-4-yl)amino)phenyl)... Impurity CS-O-37085 Not Available Enquire
6,6',7,7'-tetrakis(2-methoxyethoxy)-4H-[3,4'-biquinazolin]-4... Impurity CS-O-37086 Not Available Enquire
6,7-bis(2-methoxyethoxy)-N-(3-vinylphenyl)quinazolin-4-amine Impurity CS-O-37084 1058132-82-3 Enquire
6-O-Desmethoxyethyl-6-O-chloroethyl Erlotinib Hydrochloride Impurity CS-T-52184 183320-04-9 Enquire
7-(2’-Desmethyl) Erlotinib Impurity CS-T-89073 183365-34-6 Enquire
7-O-Desmethoxy-7-O-chloroethyl Erlotinib Hydrochloride Impurity CS-T-52185 183320-19-6 Enquire
Desmethyl Erlotinib Acetate Impurity CS-T-16312 183320-15-2 Enquire
Desmethyl Erlotinib Carboxylate Acid Impurity CS-T-52272 882172-60-3 Enquire
Didesmethyl Erlotinib Hydrochloride Impurity CS-T-52743 183320-12-9 Enquire
Erlotinib impurity 1 Impurity CS-EO-00069 1710372-46-5 Enquire
Erlotinib Impurity 10 Impurity CS-P-07858 950596-58-4 Enquire
Erlotinib Impurity 11 Impurity CS-P-07859 950596-59-5 Enquire
Erlotinib Impurity 13 Impurity CS-P-07860 236750-65-5 Enquire
Erlotinib Impurity 14 Impurity CS-P-07861 236750-62-2 Enquire
Erlotinib Impurity 18 Hydrochloride Impurity CS-P-07863 299912-61-1 (free base) Enquire
Erlotinib Impurity 6 Impurity CS-P-07857 179688-26-7 Enquire
Erlotinib Impurity F Impurity CS-P-07856 1624294-38-7 Enquire
Erlotinib impurity I Impurity CS-AQ-00201 183320-29-8 Enquire
Erlotinib impurity K Impurity CS-AQ-00203 1225350-79-7 Enquire
Erlotinib impurity L Impurity CS-AQ-00204 Not Available Enquire
Erlotinib impurity, 6-(2-chloroethoxy)-7-(2-methoxyethoxy) Impurity CS-P-07855 183321-83-7 Enquire
Erlotinib impurity, 6-(2-methoxyethoxy)-7-(2-chloroethoxy) Impurity CS-P-07854 183321-85-9 Enquire
Erlotinib impurity, 6,7-bis(2-chloroethoxy) Impurity CS-P-07853 183321-82-6 Enquire
Erlotinib Related Compound A (Base) Impurity CS-P-08699 299912-60-0 Enquire
Erlotinib-N-Oxide Impurity CS-O-16945 Not Available Enquire
N-(3-bromophenyl)-6,7-bis(2-methoxyethoxy)-4-quinazolinamine... Impurity CS-T-94107 2055840-41-8 Enquire
N-(3-Desethynylphenyl)-N-(3-(1-chlorovinyl)phenyl) Erlotinib Impurity CS-O-33361 2204518-92-1 Enquire


Intermediate

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
4-(3-Aminophenyl)-2-methyl-3-butyn-2-ol Intermediate CS-AC-02753 69088-96-6 In Stock
6,7-bis-(2-Methoxyethoxy)-quinazolin-4(3h)-one Intermediate CS-O-31512 179688-29-0 In Stock
Ethyl 3,4-Dihydroxybenzoate Intermediate CS-T-22061 3943-89-3 In Stock
N-(3-Desethynylphenyl)-N-(3-bromophenyl) Erlotinib Intermediate CS-T-16104 328528-74-1 In Stock


Fine Chemicals

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
3-Bromonitrobenzene Fine Chemicals CS-T-08702 585-79-5 Enquire
4-Chloro-6,7-Bis-(2-methoxyethoxy)-4(3H)-quinazoline Fine Chemicals CS-O-31360 183322-18-1 In Stock
2-((4-((3-ethynylphenyl)amino)-6-(2-methoxyethoxy)quinazolin... Fine Chemicals CS-O-34203 183320-24-3 Enquire
3-Bromoaniline Fine Chemicals CS-T-07904 591-19-5 Enquire


Nitrosamine

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
N-Nitroso Erlotinib Nitrosamine CS-O-38886 ---- Discontinued
N-Nitroso Erlotinib Cyclised compound Nitrosamine CS-O-44703 Not Available Discontinued


Pharmaceutical Stds.

COMPOUND CATEGORY CAT. No. CAS. No. STOCK STATUS
2-[[4-Amino-7-(2-methoxyethoxy)-6-quinazolinyl]oxy]ethanol Pharmaceutical Stds. CS-TA-15036 1839513-98-2 Enquire
6,7-Bis(2-methoxyethoxy)-4-quinazolinamine Pharmaceutical Stds. CS-TA-59236 1417161-98-8 Enquire