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HuagongsheHuagongshe Chemistry Print Report · For research reference only
HCID 6915744Generated: October 30, 2026

Roxithromycin

Roxid · Rulid · Roxithromycin (Roxl-150) · Roxithromycin Solution, 100ppm · Brilid · Overal · RU 965 · Surlid

https://huagongshe.com/en/chemical/6915744

Roxithromycin molecular structure

Identifiers & Physical Properties

CAS No.80214-83-1
Molecular formulaC41H76N2O15
Average molar mass837 g/mol
Monoisotopic mass836.52456972 g/mol
SMILESCC[C@H]1OC(=O)[C@H](C)[C@@H](O[C@H]2C[C@@](C)(OC)[C@@H](O)[C@H](C)O2)[C@H](C)[C@@H](O[C@@H]2O[C@H](C)C[C@H](N(C)C)[C@H]2O)[C@](C)(O)C[C@@H](C)/C(=N\OCOCCOC)[C@H](C)[C@@H](O)[C@]1(C)O
InChIKeyRXZBMPWDPOLZGW-XMRMVWPWSA-N
PubChem CID6915744
ChEMBLCHEMBL1214185
ChEBICHEBI:48844
EC No.617-007-5

Chemical & Physical Properties

XLogP3.1
Topological polar surface area217
Hydrogen bond donors5
Hydrogen bond acceptors17
Rotatable bonds13
Heavy atoms58
Formal charge0
Complexity1,310
DrugsPharmaceuticals -> AntibioticsPharmaceuticals -> Listed in ZINC15
LogP (partition coefficient)3.46
Human DrugsBreast FeedingLactationAnti-Bacterial AgentsAnti-Infective AgentsMacrolides
Dissociation Constants9.27
Collision Cross Section285.66 Ų [M+Na]+
Melting point111-118C
Boiling point864.7±75.0 °C(Predicted)
alphaD25 -77.5 ±2° (c = 0.45 in chloroform)
Density1.25±0.1 g/cm3(Predicted)
Flash point>110°(230°F)
Storage conditionsSealed in dry,2-8°C
Solubilitychloroform: soluble10mg/mLSoluble in water to 18&#181
pKa (acidity coefficient)pKa 9.27±0.01(H2O t = 25.0 I = 0.15 (KCl)) (Uncertain)
Physical statepowder
ColorWhite to off-white
Merck14,8276
Major applicationspharmaceutical (small molecule)
InChIKeyRXZBMPWDPOLZGW-HEWSMUCTSA-N
SMILESCCC1OC(=O)C(C)C(OC2CC(C)(OC)C(O)C(C)O2)C(C)C(OC3OC(C)CC(C3O)N(C)C)C(C)(O)CC(C)C(=N/OCOCCOC)\C(C)C(O)C1(C)O
CAS DataBase Reference80214-83-1
FDA UNII21KOF230FA
ATC codeJ01FA06
EPA Substance Registry SystemErythromycin, 9-[O-[(2-methoxyethoxy)methyl]oxime], (9E)- (80214-83-1)
UNSPSC Code41116107
NACRESNA.24
GHS pictogramGHS07
Signal wordWarning
GHS hazard statementsH302
GHS precautionary statementsP264-P270-P301+P312-P501
Hazard symbolsXn
Risk statements (R)22
Safety statements (S)26-24/25
Water hazard class (WGK)3
RTECS numberKF4990000
Customs code29415000
Storage class11 - Combustible Solids
Hazard classAcute Tox. 4 Oral

Safety & Regulations

GHS classificationWarningH302 (100%): Harmful if swallowed [Warning Acute toxicity, oral]P264, P270, P301+P317, P330, and P501 (click each P-code to see the statement)Aggregated GHS information provided per 67 reports by companies from 2 notifications to the ECHA C&L Inventory.DangerH302: Harmful if swallowed [Warning Acute toxicity, oral]
Regulatory informationRoxithromycin: Does not have an individual approval but may be used under an appropriate group standard
Hazard Classes and CategoriesAcute Tox. 4 (100%)Acute toxicity (Oral) - Category 4
Drug Induced Liver InjuryDrug-Induced Liver Injury Severity and Toxicity (DILIst)ROXITHROMYCINDILI PositiveDOI:10.1016/j.drudis.2019.09.022
Effects During Pregnancy and Lactation◉ Summary of Use during Lactation
Water hazard class (WGK)3
RTECS numberKF4990000
Customs code29415000
Risk statements (R)22
Signal wordWarning
GHS pictogramGHS07
Hazard symbolsXn
Safety statements (S)26-24/25
Storage class11 - Combustible Solids
GHS hazard statementsH302
Hazard classAcute Tox. 4 Oral
GHS precautionary statementsP264-P270-P301+P312-P501

Applications & Uses

Uses

1. It belongs to macrolide antibiotics, being a kind of erythromycin derivative with the antibacterial spectrum being similar as erythromycin but having a 6 times stronger effect on erythromycin with high bioavailability. It is used for the treatment of respiratory tract infection, such as pneumonia, acute bronchitis, acute infection of chronic bronchitis, atypical pneumonia, and genitourinary system infection, skin and soft tissue infections, having good therapeutic effect and tolerance with smaller adverse reactions than erythromycin. 2. As the new generation of macrolide antibiotics; 3. The product belongs to a new generation of macrolide antibiotics, mainly used for Gram-positive bacteria, anaerobes, chlamydia and mycoplasma. Its antibacterial activity in vitro is similar as erythromycin with its in vivo effect being 1-4 times stronger than erythromycin. Pharmacological effects and indications 1, it has strong bactericidal effect on Gram-negative bacteria and some Gram-negative bacteria (meningococcus, Neisseria gonorrhoeae, influenza bacilli, pertussis, Brucella) and spirochetes, Mycoplasma pneumoniae and Rickettsia. Legionella is sensitive to it; its effect against mycoplasma and chlamydia is further enhanced. 4. 2, antibacterial mechanism: it can bind to the bacterial ribosome 50S subunit, through blocking the peptidyl transfer and MRNA displacement, further inhibiting the protein synthesis. 3, this product has excellent oral absorption and quick efficacy with stronger bioavailability and plasma concentrations than erythromycin. According to reports, oral administration of 150 mg can lead to a peak plasma concentration of up to 6.6~7.9 ug/ml while the value for erythromycin under the same conditions is only 0.2~0.4ug/ml; roxithromycin is mainly distributed in body fluids and tissues, with high and durable tissue concentration and cell concentration. Moreover, it has a half-life of up to 12 h while the value for erythromycin is only 1.5~2.0h. 4, in clinical medicine, it is the first-choice drug for the treatment of drug-resistance Staphylococcus aureus and hemolytic streptococcus. In veterinary clinical practice, it is used for the treatment of penicillin-resistant staphylococcus aureus caused severe infection, pneumonia, uterine inflammation and poultry chronic respiratory disease. 5, the goods are mainly used for the treatment of livestock and poultry chronic respiratory disease with good efficacy in the treatment of livestock and poultry staphylococcus and streptococcal disease, chlamydia, spirocheal disease (swine dysentery), infectious pleurisy and rhinitis. 6, indications: avian neck swelling, local heat, pain, difficulty breathing, mouth and nose flow white foam, mucous membranes and skin cyanosis and other symptoms.

Description

Roxithromycin, an oxime ether derivative of erythromycin, is a new macrolide antibiotic of high potency and long duration. Its in v i m activity spectrum is similar to that of erythromycin, but is superior to the latter against Legionella, Mycoplasma and Chlamydia.

Uses

Roxithromycin was one of the new generation erythromycins introduced in the 1980s. Improved acid stability was achieved by converting the 9-keto group to the more stable oxime and alkylation of the oxime to provide the methoxyethoxymethyl ether oxime. In vivo, roxithromycin exhibits higher tissue levels and a longer half-life while being slightly less potent than erythromycin in vitro.

Uses

anesthetic (local)

Uses

Semisynthetic erythromycin derivative. Antibacterial