The Bromothymol Blue Solution, cataloged under National Stock Number 6810-00-281-4271, is classified within Federal Supply Class 6810 (Chemicals) of the Chemicals and Chemical Products group. Government technical data includes 12 specifications, cited from the U.S. Government catalog. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. 8 items share a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
Technical Specifications
Parameter
Value
NSN
6810-00-281-4271
Item Name
Bromothymol Blue Solution
FSC / FSG
6810 / 68 — Chemicals
Status
ACTIVE
Ph Range Determination by Solution
+6.0 TO 7.6
Solute Grade
ACS
Solute Designation
BROMOTHYMOL BLUE
Ph Adjustment Range
6.5 MINIMUM AND 7.1 MAXIMUM
Solute Spec/std
FED O-C-265
Solution Ph Value Range
+6.5 TO 7.1
Unit Package Quantity
1
Solvent Concentration Percentage
50.0 BY VOLUME WATER, DISTILLED AND 50.0 BY VOLUME METHANOL
Primary Container Type
BOTTLE
Quantity Within Each Unit Package
4.0 OUNCES OZ
Solvent Designation
WATER, DISTILLED AND METHANOL
Solvent Grade
ACS
Lifecycle & Compliance
Acquisition Status
ACTIVE
DEMIL Code
DEMIL A — No Demilitarization Required
Hazard
Hazardous per DLA record (HMIC Y)
Criticality Code
X
⇄Related Items8
Each row states its source: a government interchangeability/replacement code, or a possible match on a shared part number.
5120-00-288-7803POSSIBLE MATCH
SCREWDRIVER,FLAT TIP
Possible match (shared part number)
5365-00-350-367625532POSSIBLE MATCH
SPACER,RING
Possible match (shared part number)The Oilgear Company Dba Jiffy Lube 213 Div Oilgear
5330-00-365-21442A0614POSSIBLE MATCH
GASKET
Possible match (shared part number)Caterpillar Inc Div Caterpillar Defense
2915-00-408-200525537POSSIBLE MATCH
PLUNGER AND VALVE ASSEMBLY
Possible match (shared part number)Triumph Engine Control Systems Llc
3120-01-037-923110152POSSIBLE MATCH
BEARING,CROSSHEAD P
Possible match (shared part number)Gardner Denver Water Jetting Systems, Inc. Div Engineered Package Group
5920-01-095-389425537POSSIBLE MATCH
FUSEHOLDER,BLOCK
Possible match (shared part number)Transistor Devices Inc Div Astrodyne Tdi High Power Business Unit
5330-01-406-173525532POSSIBLE MATCH
PARTS KIT,SEAL REPLACEMENT,MECHA
Possible match (shared part number)Twg Canada Consolidated Inc
6720-01-540-004425532POSSIBLE MATCH
CAMERA SYSTEM,DIGITAL
Possible match (shared part number)Nikon Inc Dba Nikon Americas Inc
Cross-Reference Index
No manufacturer part numbers on file in the U.S. Government catalog.
Reference documents
Reference
Meaning
MILB11845
5/9Secondary reference
U.S. Government activity
255-32
3/2Design control — primary reference
U.S. Government activity
255-37
5/9Secondary reference
U.S. Government activity
Related Parts
5120-00-288-7803POSSIBLE MATCH
SCREWDRIVER,FLAT TIP
5365-00-350-3676POSSIBLE MATCH
SPACER,RING
25532
5330-00-365-2144POSSIBLE MATCH
GASKET
2A0614
2915-00-408-2005POSSIBLE MATCH
PLUNGER AND VALVE ASSEMBLY
25537
3120-01-037-9231POSSIBLE MATCH
BEARING,CROSSHEAD P
10152
5920-01-095-3894POSSIBLE MATCH
FUSEHOLDER,BLOCK
25537
5330-01-406-1735POSSIBLE MATCH
PARTS KIT,SEAL REPLACEMENT,MECHA
25532
6720-01-540-0044POSSIBLE MATCH
CAMERA SYSTEM,DIGITAL
25532
Frequently Asked Questions
What is NSN 6810-00-281-4271?
NSN 6810-00-281-4271 is a Bromothymol Blue Solution, classified under FSC 6810, Chemicals. Status: active.
What NSN replaces 6810-00-281-4271?
8 possible matches (shared part number, not a government interchangeability claim): 5120-00-288-7803, 5365-00-350-3676, 5330-00-365-2144. Verify interchangeability with system specifications before substitution.
What are the specifications of 6810-00-281-4271?
Key specifications for 6810-00-281-4271: Ph Range Determination by Solution: +6.0 TO 7.6; Solute Grade: ACS; Solute Designation: BROMOTHYMOL BLUE; Ph Adjustment Range: 6.5 MINIMUM AND 7.1 MAXIMUM. 12 specifications are documented in the U.S. Government catalog.
Is NSN 6810-00-281-4271 hazardous material?
Hazardous per DLA record (HMIC Y). Hazard information on this page is shown exactly as it appears in the DLA record.
Sources
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.
✓ Data cited from the U.S. Government catalog; commercial cross-references from OEM and certified industry sources.