National Stock Number (NSN) 6640-00-551-8470, or NIIN 005518470, (litmus paper) was assigned January 1, 1963 in the Federal Logistics Information System (FLIS). This NIIN is Available for Manual Assignment. This NSN does not replace any other NSNs.
There are 4 manufacturer part numbers associated with this NSN. One of those part number(s) are considered obsolete. The manufacturer part numbers were originally supplied by 2 suppliers. Today, 2 suppliers are listed as Active suppliers for this NSN. Of the active suppliers, 2 suppliers are deemed design controlled or valid supply parts.
This part number has been procured by the US Government within the last year, but shows no recent (last 90 days) procurement activity. There have been 97 contracts issued for this part number, with 90 awards given. There is heavy competition for this NSN. The US Government has awarded contracts to 11 different suppliers. The last contract numbers awarded were: SPE2DS25P0591, SPE2DS25P0065, SPE2DS25V0267, SPE2DS24V125M, SPE2DS24V8854. The total value of the awarded contracts has been US$ 1,261.97.
This NSN is somewhat common among different platforms, belonging to 7 different weapons systems.
This national stock number is in high demand. The demand for this NSN originated from less than 5 countries. Based on a planned procurement review by the Primary Inventory Control Activity (PICA) on Dec 02, 2006, this NSN's acquisition method was noted as: Acquire directly from the actual manufacturer, whether or not the prime contractor is the actual manufacturer. This part is a commercial/non-developmental/off-the-shelf-item. Valid AMCs: 1, 2, 3, 4 and 5.
This NSN is assigned to Item Name Code (INC) 23492. [A REAGENT STRIP USED TO DETERMINE THE ACIDITY, ALKALINITY, OR NEUTRALITY OF A SOLUTION/LIQUID. FOR ITEMS DESIGNED TO DETERMINE PH MORE PRECISELY BY COMPARISON WITH A COLOR CHART, SEE TEST PAPER,HYDROGEN ION.]. This item does not have a nuclear hardened feature or any other critical feature such as tolerance, fit restriction or application. There is no information in the HMIRS; however, the NSN is in an FSC in Table II of Federal Standard 313 and an MSDS may be required by the user. The requirement for an MSDS is dependent on a hazard determination of the supplier or the intended end use of the product. NSN 6640005518470 contains an unknown precious metal.
This NSN is associated to Schedule B 3822000002: diagnostic or lab reagents on a backing, prepared diag/lab reagents whether or not on a backing, not of heading 3002 or 3006; certified ref materials. The Schedule B End Use is listed as chemicals-other. NAICS classification category 325412: pharmaceutical preparation manufacturing.
This information was last updated on Jul 01, 2025.