The Scale Control Additive, cataloged under National Stock Number 6850-01-423-2813, is classified within Federal Supply Class 6850 (Miscellaneous Chemical Specialties) of the Chemicals and Chemical Products group. The manufacturer of record is Bio-Lab Inc. Government technical data includes 3 specifications, cited from the U.S. Government catalog. The record lists 1 manufacturer part number for this item, enabling identification through both NSN and commercial part number lookups. 1 additional reference document (drawings, advisory and superseded references) is recorded in the U.S. Government catalog. 1 item shares a part number with this NSN in the catalog (possible match — not a government interchangeability claim). Current acquisition status: Active.
| Parameter | Value |
|---|---|
| NSN | 6850-01-423-2813 |
| Primary Part Number | BELGARD EVN |
| Item Name | Scale Control Additive |
| FSC / FSG | 6850 / 68 — Miscellaneous Chemical Specialties |
| Manufacturer | Bio-Lab Inc |
| Status | ACTIVE |
| Level of Dermal Irritation Potential | SLIGHT |
| Supplementary Features | CLAR OR SLIGHLY HAZY AMBER LIQUID W/ SLIGHT ODOR. FREEZING POINT 0 TO -10 DEGREE C, BOILING POINT 100-102 DEGREE C, STABLE UP TO 300 DEGREE C. SUITABLE FOR USE IN MULTI-STAGE FLASH PLANTS. A NEUTRALISED AQUEOUS SOLUTION OF A POLYCARBOXYLIC ACID. PH 8-9 |
| Color | RED |
| Acquisition Status | ACTIVE |
| DEMIL Code | DEMIL A — No Demilitarization Required |
| Hazard | Hazardous per DLA record (HMIC Y) |
| Criticality Code | X |
| Part Number | Manufacturer |
|---|---|
| BELGARD EVN PRIMARY | Bio-Lab Inc (USA) |
| Reference | Meaning |
|---|---|
| BELGARD EVN | 5/9 Secondary reference Fmc Corp Process Additives Div |
NSN 6850-01-423-2813 is a Scale Control Additive, manufactured by Bio-Lab Inc, classified under FSC 6850, Miscellaneous Chemical Specialties. Status: active.
NSN 6850-01-423-2813 has 1 manufacturer part number on file: BELGARD EVN (Bio-Lab Inc).
1 possible match (shared part number, not a government interchangeability claim): 6850-01-581-5026. Verify interchangeability with system specifications before substitution.
Key specifications for BELGARD EVN: Level of Dermal Irritation Potential: SLIGHT; Supplementary Features: CLAR OR SLIGHLY HAZY AMBER LIQUID W/ SLIGHT ODOR. FREEZING POINT 0 TO -10 DEGREE C, BOILING POINT 100-102 DEGREE C, STABLE UP TO 300 DEGREE C. SUITABLE FOR USE IN MULTI-STAGE FLASH PLANTS. A NEUTRALISED AQUEOUS SOLUTION OF A POLYCARBOXYLIC ACID. PH 8-9; Color: RED; Special Features: ANTISCALANT FOR SEAWATER EVAPORATORS. 3 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.