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Specifications

Ampicillin inhibits cell wall synthesis. Used to select for drug-resistant, plasmid-bearing bacteria.
Catalog #	A2261
Specifications	• Recommended Working Concentration: 20-50ug/ml
Specifications	• Purity: 98%
	• Potency: 850-975ug/mg
	• Appearance: White crystalline powder
	• Solubility (10mg/ml, H2O): Clear, colorless and complete with warming
	• pH (1%): 8.0-10.0
	• Water: 12.0-15.0%
Working Concentration	20-50ug/ml for E. coli
Storage	Long term: Reconstitute, aliquot and freeze (-20°C) for long term storage
	Short term: Refrigerate
Stablility	Lyophilized: 1-2 years at 0-5°C
	Aqueous stock solutions: 72 hours at +4°C or 4 months as a frozen solution
	Concentrate: 1 year at -20°C
CAS Number	7177-48-2
Molecular Formula	C16H19N3O4S•3H2O
Molecular Weight	403.4
Important Note	This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.
Alternate names	6-[D-(-)-alpha-Aminophenylacetamido]-penicillanic acidtrihydrate