Tetra sodium of 1-Hydroxy Ethylidene-1,1-Diphosphonic Acid 

(HEDP•Na4)

CAS No.: 3794-83-0

Molecular Formula: C2H4O7P2Na4 Molecular weight: 294

Properties:

HEDP•Na4 is an good scale inhibitor for calcium carbonate, it can be used in low pressure boiler water system, circulating water system, industrial and municipal cleaning water system and swimming pool.

HEDP•Na4 is widely used in circulating cool water system, medium and low pressure boiler, oil field water pipelines as scale and corrosion inhibitor.

Specification:

items index

Appearance White powder Colorless to light yellow transparent liquid

Active component (HEDP) %  56.0 min 20.3-21.7

Active component )HEDP•Na4) % 79.9 min 29.0-31.0

Total phosphoric acid (as PO43-) % 52.0-54.0 18.4-20.4

Fe ppm 35.0 max 20 max

Dry weight loss, % 15 max --

Density (20℃) g/cm3 -- 1.26-1.36

PH 11.0-12.0 (1% water solution) 10.0-12.0 (as it)

Packing and Storage:

For liquid: Normally 250kg net in drum, IBC, or per customers. For solid: inner liner polyethylene (PE) bag, outer plastic woven bag, or confirmed by clients. Storage for ten months in shady room and dry places.

Safety Protection:

Weak acidity, Avoid contact with eye and skin, once contacted, flush with water immediately.