Storage
Store at room temperature
Synonyms
Soludiazine; Suthogen; Sodium sulfapyrimidine; Sulfadiazina sodica; Soluble sulfadiazine; Monosodium 2-sulfanilamidopyrimidine; 2-Sulfanilamidopyrimidine sodium salt
Molecular Formula
C10H9N4NaO2S
Smiles
C1=CN=C(N=C1)[N-]S(=O)(=O)C2=CC=C(C=C2)N.[Na+]
Appearance
White to off-white crystalline powder
Boiling Point
512.6℃ at 760 mmHg
Relative Density
1.496 (Predicted)
General Description
Sulfadiazine sodium is a short-acting sulfonamide antibiotic administered intravenously for serious infections. It is the sodium salt of sulfadiazine, providing water solubility for parenteral use. The drug is often combined with pyrimethamine for the treatment of toxoplasmosis.
Mechanism of Action
Sulfadiazine competitively inhibits bacterial dihydropteroate synthase, blocking the incorporation of para-aminobenzoic acid (PABA) into dihydrofolic acid. This disrupts folate synthesis, which is essential for bacterial DNA production. Human cells are unaffected because they utilize preformed folate. The action is bacteriostatic, requiring host immune defenses to eliminate the organism.
Application
Sulfadiazine sodium is indicated for the treatment of nocardiosis, toxoplasmosis (with pyrimethamine), and as second-line therapy for urinary tract infections. Intravenous administration is reserved for severe, hospitalized patients. It is also used for rheumatic fever prophylaxis in penicillin-allergic patients.
In a rat study, second‑degree burns covering less than 10% body surface area were left untreated (control) or treated daily with povidone‑iodine, saline, or silver sulfadiazine for 21 days. Histological evaluation of inflammatory cells, vascularization, fibroblast proliferation, collagen formation, and epithelialization revealed no statistically significant differences between any treatment group and the control. The authors conclude that, under these experimental conditions, none of the three common burn dressings showed superiority over no treatment. They call for further studies using deeper or larger burn wounds to better assess these agents’ clinical utility.
Fig. 1 Hematoxylin and eosin staining. (Yüksel EB, et al., 2014)
References
- Yüksel EB, et al. The effect of different topical agents (silver sulfadiazine, povidone-iodine, and sodium chloride 0.9%) on burn injuries in rats. Plast Surg Int. 2014;2014:907082.
New sulfadiazine‑chitosan conjugates were used to form polyelectrolyte complexes with sodium hyaluronate. The complexes were characterized by FTIR, SEM, and near‑infrared chemical imaging. They demonstrated antimicrobial activity against E. coli, Listeria monocytogenes, and Salmonella typhymurium, with complexes containing sulfadiazine‑modified chitosan being more active than those with unmodified chitosan. These PECs have potential for burn wound treatment.
Fig. 2 Swelling behavior of PEC (polyelectrolyte complexe) sponges in PBS (phosphate buffered saline) pH 7.4 at 37 °C. (Dumitriu RP, et al., 2015)
References
- Dumitriu RP, et al. Sulfadiazine-Chitosan Conjugates and Their Polyelectrolyte Complexes with Hyaluronate Destined to the Management of Burn Wounds. Materials (Basel). 2015;8(1):317-338.
Does Sulfadiazine Sodium require protection from light and moisture during storage?
Yes, it is photosensitive and hygroscopic. Light exposure causes discoloration; moisture promotes hydrolysis. Store in light-resistant, tightly sealed containers with desiccant.
What is the recommended storage temperature for Sulfadiazine Sodium?
Store at controlled room temperature (15-25°C). Avoid excessive heat above 30°C, which accelerates degradation to sulfanilamide and other impurities.
Is Sulfadiazine Sodium stable in solution for intravenous use?
Reconstituted solutions are alkaline and stable for up to 24 hours at room temperature. We provide in-use stability data for various diluents and storage conditions.
How is the impurity sulfanilamide monitored during stability?
This primary hydrolysis product is specifically quantified using a stability-indicating HPLC method, ensuring it remains below pharmacopoeial limits.