Home/Compounds/Pharmaceutical Intermediate/4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylic acid ethylester 1,1-dioxide
C12H13NO5S
283.3 g/mol
Pharmaceutical IntermediateDanger
Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide
CAS24683-26-9EC246-403-7
Category
Pharmaceutical Intermediate
Compound Class
Heterocycle
Primary Use
Pharmaceutical Intermediate
Ethyl 4-hydroxy-2-methyl-1,1-dioxo-1λ6,2-benzothiazine-3-carboxylate is a chemical compound used primarily as a pharmaceutical intermediate. It features a bicyclic structure containing an aromatic ring, an ester group, and a sulfonamide-like moiety, making it a building block in the synthesis of active pharmaceutical ingredients.
pharmaceutical intermediateresearch compound for drug development
Content scope: Information here supports chemical identification and industrial supply, research, and manufacturing contexts. It is not a therapeutic claim, medical advice, or drug-use instructions.
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Related Compounds
SimilarStructure SimilarSimilarity 0.73
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Referencesame scaffold
Isopropyl-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate-1,1-dioxide
CAS118854-48-1
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Safety Reference
Danger
H331Toxic if inhaled
Customs Tariff Classification
The international HS code for Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (CAS 24683-26-9) is 2934.99.
HS code (international, 6-digit)
2934.99
EU CN code (8-digit)
2934 99 90
Classification per the EU customs inventory ECICS (2026-07 snapshot, HS 2022). National tariff lines and product form can affect the final classification.
Identifiers
IUPAC Name
ethyl 4-hydroxy-2-methyl-1,1-dioxo-1lambda6,2-benzothiazine-3-carboxylate
InChIKey
QWTNANUGXZEPFQ-UHFFFAOYSA-N
SMILES
CCOC(=O)C1=C(C2=CC=CC=C2S(=O)(=O)N1C)O
Synonyms (23)
- MELOXICAM IMPURITY A (EP IMPURITY)
- Meloxicam EP Impurity A; Piroxicam EP Impurity K
- Meloxicam impurity A, European Pharmacopoeia (EP)
- PIROXICAM IMPURITY K (EP IMPURITY)
- Piroxicam EP Impurity K(Meloxicam EP Impurity A)
- MELOXICAM IMPURITY A
- Meloxicam impurity A CRS
- PIROXICAM IMPURITY K
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