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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 1981Generated: October 25, 2026

Acemetacin

aximeixin · AceMetacin (EMflex) · k-708 · Solart · Emflex · acemix · tv1322 · rantudil

https://huagongshe.com/en/chemical/1981

Acemetacin molecular structure

Identifiers & Physical Properties

CAS No.53164-05-9
Molecular formulaC21H18ClNO6
Average molar mass415.8 g/mol
Monoisotopic mass415.08226498 g/mol
SMILESCOc1ccc2c(c1)c(CC(=O)OCC(=O)O)c(C)n2C(=O)c1ccc(Cl)cc1
InChIKeyFSQKKOOTNAMONP-UHFFFAOYSA-N
PubChem CID1981
ChEMBLCHEMBL189171
ChEBICHEBI:31162
EC No.258-403-4
DTXSIDDTXSID7022540

Chemical & Physical Properties

XLogP4.2
Topological polar surface area94.8
Hydrogen bond donors1
Hydrogen bond acceptors6
Rotatable bonds7
Heavy atoms29
Formal charge0
Complexity620
DrugsPharmaceuticals -> Analgesics and anti-inflammatoriesPharmaceuticals -> Listed in ZINC15Pharmaceuticals -> Used in Switzerland
SolubilitySlightly soluble>62.4 [ug/mL] (The mean of the results at pH 7.4)Practically insoluble in water, soluble in acetone, slightly soluble in anhydrous ethanol.
Human DrugsBreast FeedingLactationMilk, HumanAnalgesic AgentsAnti-inflammatory Agents, NonsteroidalPharmaceuticals
Boiling point637ºC565.5±50.0 °C(Predicted)
Melting point151.5ºC151.5°C
Dissociation Constants2.6
Collision Cross Section197.64 Ų [M+Na]+ [CCS Type: TWMethod: calibrated with polyalanine and drug standards]191 Ų [M+H]+ [CCS Type: TW
Density1.2387 (rough estimate)
Refractive index1.6000 (estimate)
RTECS numberNL3521400
Storage conditionsSealed in dry,Store in freezer, under -20°C
pKa (acidity coefficient)2.60±0.10(Predicted)
Physical stateSolid
ColorVery fine, pale-yellow crystals from pet eth
Merck14,27
Major applicationspharmaceutical (small molecule)
InChIInChI=1S/C21H18ClNO6/c1-12-16(10-20(26)29-11-19(24)25)17-9-15(28-2)7-8-18(17)23(12)21(27)13-3-5-14(22)6-4-13/h3-9H,10-11H2,1-2H3,(H,24,25)
InChIKeyFSQKKOOTNAMONP-UHFFFAOYSA-N
SMILESN1(C(=O)C2=CC=C(Cl)C=C2)C2=C(C=C(OC)C=C2)C(CC(OCC(O)=O)=O)=C1C
CAS DataBase Reference53164-05-9(CAS DataBase Reference)
FDA UNII5V141XK28X
ATC codeM01AB11
UNSPSC Code41116107
NACRESNA.24
GHS pictogramGHS06
Signal wordDanger
GHS hazard statementsH300+H310+H330
GHS precautionary statementsP260-P262-P264-P280-P302+P352+P310-P304+P340+P310
Hazard symbolsT+
Risk statements (R)26/27/28
Safety statements (S)22-25-36/37/39-45-24/25
UN transport numberUN 2811
Water hazard class (WGK)3
Hazard class6.1(a)Acute Tox. 1 InhalationAcute Tox. 2 DermalAcute Tox. 2 Oral
Packing groupII
Customs code29339900
Storage class6.1A - Combustible acute toxic Cat. 1 and 2very toxic hazardous materials
ToxicityLD50 in male, female mice, male, female rats (mg/kg): 55.5, 18.42, 24.2, 30.1 orally34.1, 51.1, 38.1, 28.3 i.v. (Jacobi, Dell)
Limited quantities0.5 Kg (solid)
Excepted quantitiesMax Inner Pack (1g or 1ml) and Max Outer Pack (500g or 500ml)

Safety & Regulations

GHS classificationDangerH300 (100%): Fatal if swallowed [Danger Acute toxicity, oral]P260, P262, P264, P270, P271, P280, P284, P301+P316, P302+P352, P304+P340, P316, P320, P321, P330, P361+P364, P403+P233, P405, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 65 reports by companies from 4 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.
Hazard Classes and CategoriesAcute Tox. 2 (100%)
Drug Induced Liver InjuryDrug-Induced Liver Injury Severity and Toxicity (DILIst)ACEMETACINDILI PositiveDOI:10.1016/j.drudis.2019.09.022
Effects During Pregnancy and Lactation◉ Summary of Use during Lactation
Water hazard class (WGK)3
UN transport numberUN 2811
Customs code29339900
ToxicityLD50 in male, female mice, male, female rats (mg/kg): 55.5, 18.42, 24.2, 30.1 orally34.1, 51.1, 38.1, 28.3 i.v. (Jacobi, Dell)
Risk statements (R)26/27/28
Signal wordDanger
GHS pictogramGHS06
Hazard symbolsT+
Safety statements (S)22-25-36/37/39-45-24/25
Hazard class6.1(a)Acute Tox. 1 InhalationAcute Tox. 2 DermalAcute Tox. 2 Oral
Storage class6.1A - Combustible acute toxic Cat. 1 and 2very toxic hazardous materials
Packing groupII
GHS hazard statementsH300+H310+H330
Limited quantities0.5 Kg (solid)
Excepted quantitiesMax Inner Pack (1g or 1ml) and Max Outer Pack (500g or 500ml)
GHS precautionary statementsP260-P262-P264-P280-P302+P352+P310-P304+P340+P310

Applications & Uses

Description

Acemetacin is used in the treatment of pain and restricted mobility resulting from chronic articular rheumatism, degenerative articular disease, gout, and inflammation of muscle, joints, and tendons. Acemetacin causes less gastrointestinal blood loss than indomethacin. Its anti-inflammatory activity results from liberation of the parent compound, indomethacin.

Uses

Cyclo-oxygenase inhibitor; analgesic; anti-inflammatory.

Uses

A potent inhibitor of COX-2 found to have anti-tumor activity in the colon