4-aminopyridine, also known as fampridine, is a white crystalline powder that is soluble in water and organic solvents such as ethanol and methanol. It is classified as a potassium channel blocker and is used as a drug to improve nerve conduction in patients with multiple sclerosis, spinal cord injuries, and other neurological disorders.

The most common form of 4-aminopyridine powder is the sulfate salt which has a molecular formula of C5H6N2.H2SO4 and a molecular weight of 223.23 g/mol. It is typically supplied in bulk quantities for research, development, and manufacturing purposes.

As with any pharmaceutical product, the use of 4-aminopyridine powder requires strict adherence to regulations and guidelines set by regulatory authorities such as the FDA and EMA. It is important to handle and store the powder in a controlled environment to ensure its stability and purity.

Possible side effects of 4-aminopyridine powder include nausea, dizziness, and seizures. It is important to consult a healthcare professional before use and to follow dosage instructions carefully.