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Status Key

Now Selling Item is in stock and available for purchase.
Backordered Item is not available at this time. When it becomes available, it will be shipped.
Out of Stock Item is not available at this time. To be notified about changes in the status of this item, please proceed through the ordering process now. This will place you on the notification list without committing to the purchase.
Discontinued The product is no longer being produced.
Superseded The product has been replaced by the indicated SRM.
Not Available The SRM is no longer available from NIST.

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Last updated: 11/28/2014