PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

S669-25Sudan III Stain

Modern Laboratory Services, Inc. · NSN 6550-00-243-3398 · FSC 6550 · No Item Name Available
Verified by PartsTable
NSN 6550-00-243-3398 — this item is cataloged by the U.S. Government under National Stock Number 6550-00-243-3398. Primary manufacturer part number: S669-25.
Features
  • Sudan III Stain — FSC 6550
  • Primary Container Content Quantity: 25.000 GRAMS G
  • Physical Form: POWDER
  • Usage Design: FAT STAIN
  • Supplementary Features: D-DAY ITEM FOR DOD
  • Primary Container Type: BOTTLE, GLASS
  • 4 verified cross-references
  • Primary manufacturer: Modern Laboratory Services, Inc.
Applications
  • Industrial maintenance and repair
  • Government and military logistics
  • Equipment overhaul and refurbishment
General Description

The Sudan III Stain, cataloged under National Stock Number 6550-00-243-3398, is classified within Federal Supply Class 6550 (No Item Name Available) of the Medical, Dental, and Veterinary Equipment group. The primary manufacturer of record is Modern Laboratory Services, Inc.. Government technical data includes 5 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 9 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Active. Unit of issue: BT.

Technical Specifications
ParameterValue
NSN6550-00-243-3398
Primary Part NumberS669-25
Item NameSudan III Stain
FSC / FSG6550 / 65 — No Item Name Available
ManufacturerModern Laboratory Services, Inc.
StatusACTIVE
Primary Container Content Quantity25.000 GRAMS G
Physical FormPOWDER
Usage DesignFAT STAIN
Supplementary FeaturesD-DAY ITEM FOR DOD
Primary Container TypeBOTTLE, GLASS
Lifecycle & Compliance
Acquisition StatusACTIVE
HAZMATNo
Unit of IssueBT
Verified Substitutes 9
4410-00-070-944926100 INTERCHANGEABLE
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Emerson Automation Solutions Final Control Us Lp Div Navy Product Team
5130-00-402-817626100 INTERCHANGEABLE
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5330-00-505-3712 INTERCHANGEABLE
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6685-00-606-8178 INTERCHANGEABLE
Thermostat,flow Control
4820-01-123-2999261-00 INTERCHANGEABLE
Seat,valve
Trac Regulator Co., Inc. Dba Trac Regulator Co Inc
9905-01-531-98032610.0 INTERCHANGEABLE
Tag,marker
Go Electronics Inc. Dba Control Design Supply
8115-01-549-2315S4136 INTERCHANGEABLE
Box,folding
Uline Inc
6515-01-663-412326100 INTERCHANGEABLE
Tip Set,ear,tympanometer
Welch Allyn, Inc.
7830-01-673-8079 INTERCHANGEABLE
Dumbbell,gymnastic
Cross-Reference Index
Part NumberManufacturer
S669-25 Modern Laboratory Services, Inc. (USA)
S4136 Modern Laboratory Services, Inc. (USA)
S4136-25G Sigma-Aldrich Corporation (USA)
26100 Biological Stain Commission Biochemistry Dept Box 607 University of Rochester Medical Ctr (USA)
Related Parts
4410-00-070-9449INTERCHANGEABLE
WRENCH,NOZZLE,SAFETY,VALVE
26100
5130-00-402-8176INTERCHANGEABLE
BRUSH,WIRE,ROTARY CUP
26100
5330-00-505-3712INTERCHANGEABLE
SEAL,PLAIN ENCASED
6685-00-606-8178INTERCHANGEABLE
THERMOSTAT,FLOW CONTROL
4820-01-123-2999INTERCHANGEABLE
SEAT,VALVE
261-00
9905-01-531-9803INTERCHANGEABLE
TAG,MARKER
2610.0
8115-01-549-2315INTERCHANGEABLE
BOX,FOLDING
S4136
6515-01-663-4123INTERCHANGEABLE
TIP SET,EAR,TYMPANOMETER
26100
7830-01-673-8079INTERCHANGEABLE
DUMBBELL,GYMNASTIC

Frequently Asked Questions

What is NSN 6550-00-243-3398?

NSN 6550-00-243-3398 is a Sudan III Stain, manufactured by Modern Laboratory Services, Inc., classified under FSC 6550 (No Item Name Available). Status: active.

What are the part numbers for NSN 6550-00-243-3398?

NSN 6550-00-243-3398 has 4 cross-referenced part numbers: S669-25 (Modern Laboratory Services, Inc.), S4136 (Modern Laboratory Services, Inc.), S4136-25G (Sigma-Aldrich Corporation), 26100 (Biological Stain Commission Biochemistry Dept Box 607 University of Rochester Medical Ctr).

What NSN replaces 6550-00-243-3398?

There are 9 known substitutes for 6550-00-243-3398: 4410-00-070-9449, 5130-00-402-8176, 5330-00-505-3712 and 6 more. Verify interchangeability with system specifications before substitution.

What are the specifications of S669-25?

Key specifications for S669-25: Primary Container Content Quantity: 25.000 GRAMS G; Physical Form: POWDER; Usage Design: FAT STAIN; Part Name Assigned by Controlling Agency: SUDAN III STAIN POWDER FAT STAIN 25 GRAMS G. 6 total characteristics are documented in the Federal Logistics Information System.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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