The Leukocyte Alkaline Phosphatase S, cataloged under National Stock Number 6550-01-376-1759, is classified within Federal Supply Class 6550 (In Vitro Diagnostic Substances, Reagents, Test Kits and Sets) of the Medical, Dental, and Veterinary Equipment group. The manufacturer of record is Sigma Aldrich Co Ltd. Government technical data includes 2 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 5 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active. Unit of issue: EA.
| Parameter | Value |
|---|---|
| NSN | 6550-01-376-1759 |
| Primary Part Number | 86R |
| Item Name | Leukocyte Alkaline Phosphatase S |
| FSC / FSG | 6550 / 65 — In Vitro Diagnostic Substances, Reagents, Test Kits and Sets |
| Manufacturer | Sigma Aldrich Co Ltd |
| Status | ACTIVE |
| Component Quantity | 6 |
| Nonsupply Items and Quantities | 10 ML NAPHTHOL AS-B1 ALKALINE SOLUTION 1; 10 ML FRV ALKALINE SOLUTION 1; 10 ML SODIUM NITRITE SOLUTION 1; 50 ML CITRATE SOLUTION 1; 50 ML HEMATOXYLIN SOLUTION 1; ONE GILL NO. 3 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Unit of Issue | EA |
| Part Number | Manufacturer |
|---|---|
| 86R | Sigma Aldrich Co Ltd (GBR) |
| Reference | Meaning |
|---|---|
| 86-R | 5/9 Secondary reference Sigma Chemical Co |
| 86R | 5/9 Secondary reference Sigma-Aldrich Corporation |
| F93D168 | 5/1 Secondary reference Air Force Medical Logistics Office |
| 86R-1KT | 3/9 Design control — primary reference Sigma-Aldrich Corporation |
| 86R | 5/9 Secondary reference Aldrich Chemical Co Inc Sub of Sigma Aldrich Corp |
NSN 6550-01-376-1759 is a Leukocyte Alkaline Phosphatase S, manufactured by Sigma Aldrich Co Ltd, classified under FSC 6550, In Vitro Diagnostic Substances, Reagents, Test Kits and Sets. Status: active.
NSN 6550-01-376-1759 has 1 manufacturer part number on file: 86R (Sigma Aldrich Co Ltd).
1 possible match (shared part number, not a government interchangeability claim): 6530-01-377-1446. Verify interchangeability with system specifications before substitution.
Key specifications for 86R: Component Quantity: 6; Nonsupply Items and Quantities: 10 ML NAPHTHOL AS-B1 ALKALINE SOLUTION 1; 10 ML FRV ALKALINE SOLUTION 1; 10 ML SODIUM NITRITE SOLUTION 1; 50 ML CITRATE SOLUTION 1; 50 ML HEMATOXYLIN SOLUTION 1; ONE GILL NO. 3; Special Features: USED TO STAIN BONE MARROW TO DISTINGUISH CHRONIC MYELOCYLIC LEUKEMIA IN CASES OF UNEXPLAINED LEUKOCYTOSIS; Part Name Assigned by Controlling Agency: LEUKOCYTE ALKALINE PHOSPHATE STAIN KIT USED TO STAIN BONE MARROW. 2 specifications are documented in the U.S. Government catalog.
Possible hazard — SDS may be required (DLA HMIC P). Hazard information on this page is shown exactly as it appears in the DLA record.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-16.
U.S. Government catalog: edition PUBLOGDVD v12.0.0 (OCT 2026), edition date 2026-10-01, retrieved 2026-10-18.