Home · FSC 6550 In Vitro Diagnostic Substances, Reagents, Test Kits And Sets · NSN 6550-01-574-6831

NSN 6550-01-574-6831 — Chlorine Test Tablets

NIIN 01-574-6831 · unit of issue PG · AAC L (not stocked, local purchase) · source of supply SMS

Buying rhythm

from 7 government buys since 2025

The government has bought this item about every 2 months (very regular, gaps vary ±34%). Last buy Sep 9, 2026. If the rhythm holds, the next one falls between Sep 24, 2026 and Dec 23, 2026: a buy is due about now.

How well this works: for very regular items, "next buy about one typical gap after the last, give or take 112 days" caught the actual next buy 49% of the time across 5,054 past buys, against 20% for a fixed "one year later" guess. A rhythm, not a schedule: DLA buys when stock and demand say so. Every item due for a buy now.

NSN 6550-01-574-6831 is the national stock number for a chlorine test tablets in federal supply class 6550 (In Vitro Diagnostic Substances, Reagents, Test Kits And Sets). It cross-references to 7 manufacturer part numbers from 5 CAGE codes, including La Motte Chemical Products Co Inc, The Dba La Motte Company, Defense Logistics Agency Directorate Of Medical Materiel Defense Supply Center Philadelphia, Arthur H. Thomas Company; the primary is 11980. The unit of issue is PG and the FLIS list price is $21.42.

The U.S. government has bought this item 22 times on record, 22 of them in the last 24 months, most recently on September 15, 2026 for $18 from Szy Holdings, LLC. The median unit price paid over 36 months is $17.69. No seller has confirmed stock of it here in the last 60 days; watching the number is free and the first listing triggers an alert.

7

part numbers from 5 CAGEs

0

open solicitations, all agencies

22

government buys in 24 months · median $17.69

0

sellers with confirmed stock

Watch NSN 6550-01-574-6831: an email the morning the government solicits or buys it, or an AD names it. Free.
Know someone who should see this?

Cross-references

Part numbers filed against this stock number, with the manufacturer (CAGE) and the FLIS reference codes.

Part numberCAGEManufacturerReferenceVariation
6903A-J34807La Motte Chemical Products Co Inc, The Dba La Motte Company3 · Design control (vendor)9 · Reference only
1198089875Defense Logistics Agency Directorate Of Medical Materiel Defense Supply Center Philadelphia5 · Secondary reference1 · Not fully interchangeable
1221U5159728Arthur H. Thomas Company5 · Secondary reference2 · Fully interchangeable
6515NCM09341964616Defense Medical Standardization Board5 · Secondary reference1 · Not fully interchangeable
9864H1059728Arthur H. Thomas Company5 · Secondary reference9 · Reference only
DPD CHLORINE TABLETS59728Arthur H. Thomas Company5 · Secondary reference9 · Reference only
WS74683170784Fort Defiance Industries LLC5 · Secondary reference2 · Fully interchangeable

Government demand

Nothing open right now. Last government buy Sep 15, 2026. Watch this NSN and we will email you when it is solicited.

What the government paid

DateVendorQtyUnit costAmountBuyerReference
Sep 15, 2026Szy Holdings, LLC 0AG09$18DlaSPE2DS26V9859 » Award/Basic Package View
Sep 9, 2026Midland Scientific Inc 6P701$18DlaSPE2DS26V9655 » Award/Basic Package View
Aug 3, 2026Midland Scientific Inc 6P70110$18.42DlaSPE2DS26V8320
Jul 13, 2026Szy Holdings, LLC 0AG091$18.42DlaSPE2DS26V7608
Jul 9, 2026Szy Holdings, LLC 0AG091$18.25DlaSPE2DS26P2394
May 29, 2026Midland Scientific Inc 6P7011$18.45DlaSPE2DS26V6106
Apr 29, 2026Szy Holdings, LLC 0AG091$18.45DlaSPE2DS26V5097
Apr 13, 2026Szy Holdings, LLC 0AG091$17.71DlaSPE2DS26P1389
Apr 9, 2026Szy Holdings, LLC 0AG092$17.44DlaSPE2DS26V4515
Mar 26, 2026Midland Scientific Inc 6P7011$17.43DlaSPE2DS26V4081
Mar 9, 2026Szy Holdings, LLC 0AG091$17.44DlaSPE2DS26V3563
Feb 20, 2026Szy Holdings, LLC 0AG091$17.88DlaSPE2DS26V3084
Feb 17, 2026Szy Holdings, LLC 0AG091$17.44DlaSPE2DS26V2959
Dec 29, 2025Midland Scientific Inc 6P7011$17.49DlaSPE2DS26V1678
Dec 18, 2025Midland Scientific Inc 6P7011$17.80DlaSPE2DS26V1577
Nov 7, 2025Government Scientific Source Inc 0S9082$17.50DlaSPE2DS26V0830
Nov 3, 2025Midland Scientific Inc 6P7011$17.85DlaSPE2DS26V0761
Oct 28, 2025Szy Holdings, LLC 0AG091$18.00DlaSPE2DS26V0680
Oct 1, 2025Midland Scientific Inc 6P7012$16.49DlaSPE2DS26V0011
Sep 23, 2025Ars Sales & Services LLC 1KA5910$16.45DlaSPE2DS25V260J

Sources: DLA DIBBS procurement history (unit cost), DLA award history, FPDS (all agencies), SAM.gov notices. 22 buys on record in total.

Sellers with confirmed stock

No seller has confirmed stock on this NSN in the last 60 days. Watch it and we will email you when one does, or request a quote on 11980.

Request 11980

No account needed. Goes to the sellers who carry this number or its family.

Listings appear here only while the seller has confirmed them within 60 days. Sellers: list this part free.

DLA management data

FLIS unit price
$21.42
Unit of issue
PG
Acquisition advice
L — Not stocked, local purchase
Source of supply
SMS
Shelf life code
P
Effective
Oct 1, 2025

Item characteristics

Primary Container Type
PACKAGE
Total Primary Container Quantity
100
Part Name Assigned By Controlling Agency
CHLORINE TABS NO.1 DIETHYL-P-PHENYLENEDIAMINE 100TT
Special Features
DIETHYL-P-PHENYLENDEDIAMINE (DPD) CHLORINE TABS NO.1; USED TO MEASUE FREE AVAILABLE CHLORINE IN WATER; RANGE: 0 TO 10PPM FOR APPROXIMATELY 10ML SAMPLE SIZE; SHELF LIFE APPROX. 3 YEARS; INSTRUMENT GRAD

Related stock numbers

Other NSNs filed under the same part numbers.

About this page

An NSN is 13 digits: the 4-digit Federal Supply Class and the 9-digit NIIN. Cross-references come from the federal logistics record; demand from DLA DIBBS, SAM.gov and FPDS; ADs from the Federal Register. Refreshed nightly. Market Pulse shows the whole market.

Get the daily Market Pulse

New DLA RFQs, SAM.gov notices, yesterday's awards and FAA directives, weekday mornings. Free, one click to leave.