The Membrane Antifreeze, cataloged under National Stock Number 6850-01-429-9840, is classified within Federal Supply Class 6850 (Miscellaneous Chemical Specialties) of the Chemicals and Chemical Products group. The manufacturer of record is Veolia Wts Usa, Inc. Dba Ge Water & Process Technologies. The record lists 2 manufacturer part numbers 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through both NSN and commercial part number lookups. 3 additional reference documents (drawings, advisory and superseded references) are recorded in the U.S. Government catalog. Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6850-01-429-9840 |
| Primary Part Number | PROGARD SPC |
| Item Name | Membrane Antifreeze |
| FSC / FSG | 6850 / 68 — Miscellaneous Chemical Specialties |
| Manufacturer | Veolia Wts Usa, Inc. Dba Ge Water & Process Technologies |
| Status | ACTIVE |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| PROGARD SPC PRIMARY | Veolia Wts Usa, Inc. Dba Ge Water & Process Technologies (USA) |
| TRIFREEZE 110 PRIMARY | Mann+hummel Water & Fluid Solutions, Inc. (USA) |
| Reference | Meaning |
|---|---|
| NTFREEZE | 5/9 Secondary reference Avista Technologies, Inc. |
| PROGARD SPC/5 GAL | 5/9 Secondary reference Betz Dearborn Div of Hercules Dba Argo Scientific Inc |
| PROGARD SPC | 5/9 Secondary reference Betzdearborn, a Division of Hercules, Inc. Dba Betzdearborn Div Betzdearborn |
NSN 6850-01-429-9840 is a Membrane Antifreeze, manufactured by Veolia Wts Usa, Inc. Dba Ge Water & Process Technologies, classified under FSC 6850, Miscellaneous Chemical Specialties. Status: active.
NSN 6850-01-429-9840 has 2 manufacturer part numbers on file: PROGARD SPC (Veolia Wts Usa, Inc. Dba Ge Water & Process Technologies), TRIFREEZE 110 (Mann+hummel Water & Fluid Solutions, Inc.).
Key specifications for PROGARD SPC: Special Features: CLEANER/PRESERVATIVE USED TO PREVENT FREEZING OF REVERSE OSMOSIS MEMBRANES AND ACTS AS A MILD PRESERVATIVE. FLASH POINT 700'F. USE IN WELL VENTILATED AREA. HARMFUL TO ANIMALS. 0 specifications are documented in the U.S. Government catalog.
Hazardous per DLA record (HMIC Y). 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.