2-Methyl-4-hydroxy-2H-1

Name	Ethyl 4-hydroxy-2-methyl-1,1-dioxo-2H-1,2-benzothiazine-3-carboxylate
Synonyms	2-Methyl-4-hydroxy-2H-1 MeloxicaM IMpurity A(EP) (USP RC A) 2-benzothiazine-3-carboxylic acid ethyl ester-1 Ethyl 4-hydroxy-2-methyl-1,1-dioxo-2H-1,2-benzothiazine-3-carboxylate ETHYL 4-HYDROXY-2-METHYL-1,1-DIOXO-2H-1,2-BENZOTHIAZINE-3-CARBOXYLATE Ethyl 4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide (4-Hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylic acid ethyl)1,1-dioxide 2H-1,2-Benzothiazine-3-carboxylic acid, 4-hydroxy-2-methyl-, ethyl ester, 1,1-dioxide Ethyl 4-Hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate 1,1-Dioxide(Piroxicam Impurity K) (3E)-3-[ethoxy(hydroxy)methylidene]-2-methyl-2,3-dihydro-4H-1,2-benzothiazin-4-one 1,1-dioxide Meloxicam Related Compound A (25 mg) (ethyl-4-hydroxy-2-methyl-2H-1,2-benzothiazine-3-carboxylate- 1,1-dioxide)
CAS	24683-26-9
EINECS	246-403-7
InChI	InChI=1/C12H13NO5S/c1-3-18-12(15)10-11(14)8-6-4-5-7-9(8)19(16,17)13(10)2/h4-7,15H,3H2,1-2H3/b12-10+

Molecular Formula	C12H13NO5S
Molar Mass	283.3
Density	1.458±0.06 g/cm3(Predicted)
Melting Point	140-144 °C (lit.)
Boling Point	448.1±55.0 °C(Predicted)
Flash Point	210.3°C
Vapor Presure	5.97E-08mmHg at 25°C
Appearance	neat
pKa	4.50±1.00(Predicted)
Storage Condition	2-8°C
Refractive Index	1.61
Physical and Chemical Properties	White crystalline powder. Melting point 140.0-143.0 °c.
Use	An intermediate of piroxicam (Yan Tong Xi Kang).

Hazard Symbols	T - Toxic
Risk Codes	23 - Toxic by inhalation
Safety Description	45 - In case of accident or if you feel unwell, seek medical advice immediately (show the label whenever possible.)
UN IDs	UN 2811 6.1/PG 2
WGK Germany	2
RTECS	DL0710425
HS Code	2934990002