The Indole Test Reagent, cataloged under National Stock Number 6550-01-735-1425, 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 Thermo Fisher Scientific (asheville) Llc Div Laboratory Products Division. The record lists 3 manufacturer part numbers for this item, enabling identification through both NSN and commercial part number lookups. 2 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active. Unit of issue: PG.
| Parameter | Value |
|---|---|
| NSN | 6550-01-735-1425 |
| Primary Part Number | R21550 |
| Item Name | Indole Test Reagent |
| FSC / FSG | 6550 / 65 — In Vitro Diagnostic Substances, Reagents, Test Kits and Sets |
| Manufacturer | Thermo Fisher Scientific (asheville) Llc Div Laboratory Products Division |
| Status | ACTIVE |
| 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 | PG |
| Part Number | Manufacturer |
|---|---|
| 669681 | Mckesson Medical-Surgical Inc. Dba Mckesson Medical-Surgical Inc (USA) |
| R21550 | Fisher Scientific Company L.l.c. Dba Thermofisher Scientific (USA) |
| R21550 PRIMARY | Thermo Fisher Scientific (asheville) Llc Div Laboratory Products Division (USA) |
| Reference | Meaning |
|---|---|
| 1707241 | 5/1 Secondary reference U.S. Government activity |
| 6550NCM252128 | 5/1 Secondary reference Defense Medical Standardization Board |
NSN 6550-01-735-1425 is a Indole Test Reagent, manufactured by Thermo Fisher Scientific (asheville) Llc Div Laboratory Products Division, classified under FSC 6550, In Vitro Diagnostic Substances, Reagents, Test Kits and Sets. Status: active.
NSN 6550-01-735-1425 has 3 manufacturer part numbers on file: 669681 (Mckesson Medical-Surgical Inc. Dba Mckesson Medical-Surgical Inc), R21550 (Fisher Scientific Company L.l.c. Dba Thermofisher Scientific), R21550 (Thermo Fisher Scientific (asheville) Llc Div Laboratory Products Division).
Key specifications for R21550: Special Features: REAGENT FOR THE DETECTION OF THE ABILITY OF A MICROORGANISM TO SPLIT INDOLE FROM TRYPTOPHAN. BACTIDROP SPOT INDOLE: QUANTITY. 50 X 0.75 ML. DETECTABLE ANALYTES: NITRITE, FREE NITROGEN GAS. STORAGE: 20 C TO 25 C; Part Name Assigned by Controlling Agency: REAGENT DROPPER SPOT INDOLE, 0.75 ML AMPULE 50/PK. 0 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.