Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide

Also known as: Piroxicam Impurity K, Meloxicam USP Related Compound A, Meloxicam EP Impurity A, 2-Methyl-4-hydroxy-2H-1,2-benzothiazine-1,1-dioxide-3-carboxylic acid ethyl ester, Ethyl 4-hydroxy-2-methyl-1,1-dioxo-2H-1,2-benzothiazine-3-carboxylate, EcMetAP1-IN-1, 2-Methyl-4-hydroxy-2H-1,2-benzothiazine-3-carboxylic acid ethyl ester-1,1-dioxide, Ethyl 4-hydroxy-2-methyl-2H-benzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide, 4-Hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylic acid ethyl ester 1,1-dioxide, 2-METHYL-4-HYDROXY-2H-1,2-BENZOTHIAZINE-3-CARBOXYLIC ETHYL ESTER-1,1-DIOXIDE

Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (CAS 24683-26-9) is a compound in the Organic Acids category listed in the Jingsj chemical database. It has the molecular formula C12H13NO5S and a molecular weight of 283.300 g/mol. Key properties include a melting point of 140-144 °C(lit.), a boiling point of 448.1±55.0 °C at 760 mmHg, a density of 1.5±0.1 g/cm3 and a flash point of 224.8±31.5 °C. It is classified under GHS with signal word Danger and hazard statements H331 — Toxic if inhaled. No supplier offers are currently listed; request a quote. Record last updated Aug 21, 2026.

CAS No.

24683-26-9

Jingsj CID

J-9721-2

Molecular Formula

C₁₂H₁₃NO₅S

Molecular Weight

283.300 g/mol

Category

Organic Acids

Last updated

8/21/2026