Erythromycin Lactobionate for Injection
C37H67NO13.C12H22O12
1092.22
1092.22Erythromycin mono(4-O-
-d-galactopyranosyl-d-gluconate) (salt).
Erythromycin lactobionate (1:1) (salt)
[3847-29-8].» Erythromycin Lactobionate for Injection is a sterile, dry mixture of erythromycin lactobionate and a suitable preservative. It contains the equivalent of not less than 90.0 percent and not more than 120.0 percent of the labeled amount of erythromycin (C37H67NO13).
USP Reference standards 
11
—
USP Endotoxin RS.
USP Erythromycin RS.
USP Erythromycin Lactobionate RS.
11—
USP Endotoxin RS.
USP Erythromycin RS.
USP Erythromycin Lactobionate RS.
Constituted solution—
At the time of use, it meets the requirements for Constituted Solutions under Injections 1.
1.
Identification, Infrared Absorption 197M:
the specimen and the Reference Standard being previously dried in vacuum at a pressure not exceeding 5 mm of mercury at 60
for 3 hours.
197M:
the specimen and the Reference Standard being previously dried in vacuum at a pressure not exceeding 5 mm of mercury at 60 for 3 hours.
Bacterial endotoxins 85—
It contains not more than 1.0 USP Endotoxin Unit per mg of erythromycin.
85—
It contains not more than 1.0 USP Endotoxin Unit per mg of erythromycin.
pH 791:
between 6.5 and 7.5, in a solution containing the equivalent of 50 mg of erythromycin per mL.
791:
between 6.5 and 7.5, in a solution containing the equivalent of 50 mg of erythromycin per mL.
Water, Method I 921:
not more than 5.0%.
921:
not more than 5.0%.
Particulate matter 788:
meets the requirements for small-volume injections when the constituted solution is diluted with filtered water to a concentration of not more than 5 mg of erythromycin base per mL before the test is performed.
788:
meets the requirements for small-volume injections when the constituted solution is diluted with filtered water to a concentration of not more than 5 mg of erythromycin base per mL before the test is performed.
Heavy metals, Method II 231:
0.005%.
231:
0.005%.
Other requirements—
It meets the requirements under Injections 1.
1.
Assay—
Proceed as directed for erythromycin under Antibiotics—Microbial Assays 81, using Erythromycin Lactobionate for Injection constituted as directed in the labeling. Withdraw all of the withdrawable contents where the package is represented as being a single-dose container; or, where the labeling specifies the amount of erythromycin equivalent in a given volume of the resultant preparation, withdraw an accurately measured volume. Dilute quantitatively with water to obtain a stock solution containing the equivalent of about 10 mg of erythromycin per mL. Dilute this stock solution quantitatively with Buffer No. 3 to obtain a Test Dilution having a concentration assumed to be equal to the median dose level of the Standard.
81, using Erythromycin Lactobionate for Injection constituted as directed in the labeling. Withdraw all of the withdrawable contents where the package is represented as being a single-dose container; or, where the labeling specifies the amount of erythromycin equivalent in a given volume of the resultant preparation, withdraw an accurately measured volume. Dilute quantitatively with water to obtain a stock solution containing the equivalent of about 10 mg of erythromycin per mL. Dilute this stock solution quantitatively with Buffer No. 3 to obtain a Test Dilution having a concentration assumed to be equal to the median dose level of the Standard.
Auxiliary Information—
Please check for your question in the FAQs before contacting USP.
| Topic/Question | Contact | Expert Committee |
| Monograph | Ahalya Wise, M.S.
Scientist 1-301-816-8161 |
(MDANT05) Monograph Development-Antibiotics |
| Reference Standards | Lili Wang, Technical Services Scientist 1-301-816-8129 RSTech@usp.org |
|
| 85 |
Radhakrishna S Tirumalai, Ph.D.
Senior Scientist 1-301-816-8339 |
(MSA05) Microbiology and Sterility Assurance |
USP32–NF27 Page 2295