Biological Half-Life
7-12.8 hours

[1]. D Smit. Anti-infective ophthalmic preparations in general practice, South African Family Practice, 54:4, 302-307.

[2]. Modulating the solubility of sulfacetamide by means of cocrystals†.

Sulfacetamide is a white powder. (NTP, 1992)
Sulfacetamide is a sulfonamide that is sulfanilamide acylated on the sulfonamide nitrogen. It has a role as an antimicrobial agent, an antiinfective agent, an EC 2.5.1.15 (dihydropteroate synthase) inhibitor and an antibacterial drug. It is a substituted aniline and a N-sulfonylcarboxamide. It is functionally related to a sulfanilamide. It is a conjugate acid of a sulfacetamide(1-).
An anti-infective agent that is used topically to treat skin infections and orally for urinary tract infections.
Sulfacetamide is a Sulfonamide Antibacterial.
Sulfacetamide has been reported in Apis cerana with data available.
Sulfacetamide is a synthetic sulfanylacetamide derivative with bacteriostatic activity. Sulfacetamide inhibits bacterial folic acid synthesis by competing with para amino benzoic acid. With a broad spectrum of action, it is used as an anti-infective topical agent to treat skin infections and as an oral agent for urinary tract infections. (NCI04)
An anti-bacterial agent that is used topically to treat skin infections and orally for urinary tract infections.
See also: Sulfacetamide Sodium (has salt form); Prednisolone acetate; sulfacetamide sodium (annotation moved to) ... View More ...

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Drug Indication
For the treatment of bacterial vaginitis, keratitis, acute conjunctivitis, and blepharitis.
FDA Label

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Mechanism of Action
Sulfacetamide is a competitive inhibitor of bacterial para-aminobenzoic acid (PABA), an essential component for bacterial growth (according to the Woods-Fildes theory). The inhibited reaction is necessary in these organisms for the synthesis of folic acid.

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Pharmacodynamics
Sulfacetamide is a sulfonamide antibiotic with bacteriostatic actions and broad-spectrum activity against most gram-positive and many gram-negative organisms. However, many strains of an individual species may be resistant. Sulfonamides inhibit multiplication of bacteria by acting as competitive inhibitors of p-aminobenzoic acid in the folic acid metabolism cycle. Bacterial sensitivity is the same for the various sulfonamides, and resistance to one sulfonamide indicates resistance to all. Most sulfonamides are readily absorbed orally. However, parenteral administration is difficult, since the soluble sulfonamide salts are highly alkaline and irritating to the tissues. The sulfonamides are widely distributed throughout all tissues. High levels are achieved in pleural, peritoneal, synovial, and ocular fluids. Although these drugs are no longer used to treat meningitis, CSF levels are high in meningeal infections. Their antibacterial action is inhibited by pus.

C8H10N2O3S

214.239

214.041

144-80-9

Sulfacetamide-d4;Sulfacetamide-13C6

5320

White to off-white solid powder

1.4±0.1 g/cm3

182-184 °C

0.04mmHg at 25°C

1.584

-0.96

2

4

2

14

299

0

SKIVFJLNDNKQPD-UHFFFAOYSA-N

InChI=1S/C8H10N2O3S/c1-6(11)10-14(12,13)8-4-2-7(9)3-5-8/h2-5H,9H2,1H3,(H,10,11)

N-(4-aminophenyl)sulfonylacetamide

NSC-63871; NSC63871

2934.99.9001

Powder      -20°C    3 years

                     4°C     2 years

In solvent   -80°C    6 months

                  -20°C    1 month

Note: This product requires protection from light (avoid light exposure) during transportation and storage.

Room temperature (This product is stable at ambient temperature for a few days during ordinary shipping and time spent in Customs)

DMSO : ~100 mg/mL (~466.77 mM)

Solubility in Formulation 1: ≥ 2.5 mg/mL (11.67 mM) (saturation unknown) in 10% DMSO + 40% PEG300 + 5% Tween80 + 45% Saline (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 400 μL PEG300 and mix evenly; then add 50 μL Tween-80 to the above solution and mix evenly; then add 450 μL normal saline to adjust the volume to 1 mL.
Preparation of saline: Dissolve 0.9 g of sodium chloride in 100 mL ddH₂ O to obtain a clear solution.

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Solubility in Formulation 2: ≥ 2.5 mg/mL (11.67 mM) (saturation unknown) in 10% DMSO + 90% (20% SBE-β-CD in Saline) (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of 20% SBE-β-CD physiological saline solution and mix evenly.
Preparation of 20% SBE-β-CD in Saline (4°C，1 week): Dissolve 2 g SBE-β-CD in 10 mL saline to obtain a clear solution.

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Solubility in Formulation 3: ≥ 2.5 mg/mL (11.67 mM) (saturation unknown) in 10% DMSO + 90% Corn Oil (add these co-solvents sequentially from left to right, and one by one), clear solution.
For example, if 1 mL of working solution is to be prepared, you can add 100 μL of 25.0 mg/mL clear DMSO stock solution to 900 μL of corn oil and mix evenly.

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 (Please use freshly prepared in vivo formulations for optimal results.)