Do not use after the expiration date shown on the label. Fluorescence separation may decrease by as much as 2.5 channels per month as a result of bead aging. Do not freeze the beads or expose them to direct light during storage or use. Excessive changes in results may indicate deterioration of the beads or changes in instrument conditions. For optimization of the flow cytometer before running the samples, see Optimization and Quality Control .
Sodium azide is very toxic.
If inhaled or ingested, contact a physician immediately. If skin or eye contact occurs, wash with copious amounts of water. Under aqueous acidic conditions, sodium azide yields hydrazoic acid, an extremely toxic compound. Azide compounds should be flushed with large volumes of water during disposal to avoid deposits in lead or copper plumbing where explosive conditions may develop. For information on use, refer to the appropriate user's guide .