![10-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/JTYAUSWEFIWMHF-UHFFFAOYSA-N.svg)
10-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 34580-11-5
- Formula
- C13H7BrOS
- MW
- 291.16 g/mol
VQ-044639
Impurity reference standards
Ketotifen impurities & reference standards
Characterised Ketotifen impurities, degradation products and related compounds for analytical method development, validation, QC release and regulatory filings.
24reference materials
1nitrosamine impurities
1isotope-labelled
COAHPLC · NMR · MS on request
![10-Methoxy-4H-benzo[4,5]cyclohepta[1,2- b]thiophen-4-one chemical structure](/media/structures/ZSGIVIUNURDDJL-UHFFFAOYSA-N.svg)
10-Methoxy-4H-benzo[4,5]cyclohepta[1,2- b]thiophen-4-one
- CAS
- 59743-84-9
- Formula
- C14H10O2S
- MW
- 242.29 g/mol
VQ-031391
![2-Bromo-10-methoxy-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/VKTNMDBSSPANFV-UHFFFAOYSA-N.svg)
2-Bromo-10-methoxy-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 111428-56-9
- Formula
- C14H9BrO2S
- MW
- 321.19 g/mol
VQ-031392
![2-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/GEMIJYIZSIKGMP-UHFFFAOYSA-N.svg)
2-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 126939-25-1
- Formula
- C13H7BrOS
- MW
- 291.16 g/mol
VQ-031394
![4-(1-Methyl-4-piperidinyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-ol chemical structure](/media/structures/YPJRKYDKERHEOS-UHFFFAOYSA-N.svg)
4-(1-Methyl-4-piperidinyl)-4H-benzo[4,5]cyclohepta[1,2-b]thiophene-4-ol
- CAS
- 4506-57-4
- Formula
- C19H21NOS
- MW
- 311.4 g/mol
VQ-037822
![4H-Benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/AKYJPOPHGMQXHH-UHFFFAOYSA-N.svg)
![9-Bromo-10-methoxy-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/XGKDFPWTQAWELY-UHFFFAOYSA-N.svg)
9-Bromo-10-methoxy-9,10-dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 43076-89-7
- Formula
- C14H11BrO2S
- MW
- 323.21 g/mol
VQ-037825
![9-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/YKBOOMSHWREKCW-UHFFFAOYSA-N.svg)
9-Bromo-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 57568-63-5
- Formula
- C13H7BrOS
- MW
- 291.16 g/mol
VQ-031393
![9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one chemical structure](/media/structures/JAGBUENUSNSSFW-UHFFFAOYSA-N.svg)
9,10-Dihydro-4H-benzo[4,5]cyclohepta[1,2-b]thiophen-4-one
- CAS
- 1622-55-5
- Formula
- C13H10OS
- MW
- 214.28 g/mol
VQ-031390
FAQs — Ketotifen impurities
Which Ketotifen impurities do you supply?
We list 24 Ketotifen-related reference materials, including process impurities, degradation products, nitrosamine impurities, stable-isotope-labelled standards and related compounds. Each is supplied with a COA, and characterisation data (HPLC, 1H-NMR, MS, IR) can be provided on request.
What are Ketotifen impurity standards used for?
They are used for analytical method development and validation, impurity identification and quantification, forced-degradation and stability studies, and to support ANDA, DMF and other regulatory submissions under ICH Q3A/Q3B (and ICH M7 for mutagenic impurities).
Can you synthesise a Ketotifen impurity that is not listed?
Yes. Our custom synthesis service can prepare and characterise unlisted impurities, metabolites and labelled analogues from milligram to gram scale. Share the structure or name and required quantity for a quotation.
Request Ketotifen impurity standards
We reply within one business day with price, pack options, lead time and documentation.