The Methyl Violet Stain, cataloged under National Stock Number 6550-01-169-0271, 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 A J P Scientific Inc Dba Eng Scientific. Government technical data includes 4 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government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.
| Parameter | Value |
|---|---|
| NSN | 6550-01-169-0271 |
| Primary Part Number | 5501 |
| Item Name | Methyl Violet Stain |
| FSC / FSG | 6550 / 65 — In Vitro Diagnostic Substances, Reagents, Test Kits and Sets |
| Manufacturer | A J P Scientific Inc Dba Eng Scientific |
| Status | ACTIVE |
| Primary Container Content Quantity | 100.000 MILLILITERS |
| Primary Container Type | BOTTLE |
| Physical Form | LIQUID |
| Total Primary Container Quantity | 2 |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Possible hazard — SDS may be required (DLA HMIC P) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| 5501 PRIMARY | A J P Scientific Inc Dba Eng Scientific (USA) |
| Reference | Meaning |
|---|---|
| HEINZ BODY STAIN | 5/9 Secondary reference A J P Scientific Inc Dba Eng Scientific |
| 550 | 5/9 Secondary reference A J P Scientific Inc Dba Eng Scientific |
| 5500 | 5/1 Secondary reference A J P Scientific Inc Dba Eng Scientific |
NSN 6550-01-169-0271 is a Methyl Violet Stain, manufactured by A J P Scientific Inc Dba Eng Scientific, classified under FSC 6550, In Vitro Diagnostic Substances, Reagents, Test Kits and Sets. Status: active.
NSN 6550-01-169-0271 has 1 manufacturer part number on file: 5501 (A J P Scientific Inc Dba Eng Scientific).
1 possible match (shared part number, not a government interchangeability claim): 6550-01-449-4551. Verify interchangeability with system specifications before substitution.
Key specifications for 5501: Primary Container Content Quantity: 100.000 MILLILITERS; Primary Container Type: BOTTLE; Physical Form: LIQUID; Special Features: USED IN DETECTING HEMOLYTIC ANEMIA AND RED CELLS OF THE PRIMAQUINE-SENSITIVE TYPE; CONTAINS METHYL VIOLET AND SALINE. 4 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.