Assay (HPLC) ≥98.0% (area %)
Assay (Nonaqueous Titration) ≥98.0%
Appearance White to almost white powder or crystals
Melting Point 137–141.5 °C (decomposed, lit.)
Loss on Drying (Water Content) ≤0.5%
Residue on Ignition ≤0.1%
Heavy Metals ≤10 ppm
Impurities Single impurity ≤0.2%, total impurities ≤1.0%
Identification Consistent with the standard (IR/UV/HPLC)
pH Value (1% Suspension, 25 °C) 5.0–7.0 (predicted)
4. Main Applications (Detailed)
Sulbutiamine (CAS 3286-46-2) is a synthetic, lipophilic derivative of thiamine (Vitamin B1), developed by the French Servier Pharmaceuticals. It is composed of two modified thiamine molecules linked by a sulfur group, forming a dimer structure that enables it to cross the blood-brain barrier more easily than thiamine itself, thus exerting neurotropic effects and increasing the levels of thiamine and thiamine phosphate esters in the brain.
4.1 Pharmaceutical Field
As a key pharmaceutical ingredient, sulbutiamine is primarily used for the symptomatic treatment of asthenia (a condition characterized by persistent fatigue, weakness, and lack of energy). It works by elevating thiamine levels in the brain, exerting mild stimulant effects to improve memory, reduce feelings of weakness, and enhance mental alertness. Additionally, it may be used in combination with other medications to support daily activities in patients with Alzheimer’s disease, helping to alleviate cognitive decline associated with the condition. In several countries, it is available over-the-counter as a component of nutritional supplements for cognitive support and fatigue relief. It also has therapeutic effects on all types of Vitamin B1 deficiencies, effectively increasing blood levels of Vitamin B1.
4.2 Research and Laboratory Applications
Sulbutiamine is widely used in scientific research, particularly in neuroscience and pharmacology studies. It serves as a research reagent to investigate the role of thiamine derivatives in brain function, memory formation, and neuroprotection. Studies have shown that chronic administration of sulbutiamine can improve long-term memory formation in animals and reduce amnesic effects induced by certain substances. It is also used in analytical chemistry for the development of detection methods (e.g., HPLC with fluorimetric detection) to quantify sulbutiamine and its derivatives in biological samples such as human plasma.
4.3 Nutritional and Dietary Supplements
Due to its lipophilic properties and ability to enhance brain thiamine levels, sulbutiamine is incorporated into dietary supplements aimed at supporting cognitive health, reducing mental fatigue, and improving focus. It is often formulated with other B vitamins, amino acids, or nootropics to synergistically enhance cognitive function, making it popular among individuals seeking to improve memory and mental performance.
4.4 Other Applications
It is also used as a pharmaceutical intermediate in the synthesis of other thiamine derivatives and related compounds. Additionally, it has potential applications in the study of neurological disorders, as it can modulate brain thiamine levels and may have protective effects against neurotoxicity.
